Home

SnapSAN S3000/S5000 Snapshot User Guide

1. Determining the system configuration Sele ct necessary hardware j Hardware Confi guration configuration bee eer Sele ct necessary sofbyare Software Configuration confi guration a Installing software Install Uninstall Update iSM Install Uninstall Update SnapC antral Determining the disk array confi guration Unlock the product license Product License Unlocking j Bind a necessary logical dik wie F 5 LD Binding aLogical Dix LD Assign an identification name to the management target hardware Settings of Dik ArrayN ame Logical Disk Name and Port Name i EEN ioan cornet in ana sald ss a Binding the Snapshot Reserve Area Bind a sapshot volume ng a Snap ume i R Binding a Link V olume j re ee ea Access Control Setting Set Access Controls according to the connection state 2 i Setting a control volume ontrol V olume Setting H Only when a control volume is used Credingthe volume list 4 Volume List Creation Preparing volumes Prepari ng V olume Figure 2 1 Installation Task 10400422 002 02 2013 2013 Overland Storage Inc 42 1 SnapSAN 3000 S5000 Snapshot User Guide System Configuration System Configuration Hardware Configuration Select hardware components according to the business conditions requirements disk capacity and
2. Number 0S Type Logical Disk Name 0040h NX WebSvr0l_LV0040 0044h NX WebSvr0Ol_ LVO044 Is link setting screen displayed Czn re Figure 5 92 Link Setting Displayed If you click Yes after checking the content of the message the Link Setting screen is displayed Clicking No returns you to the previous screen letting you select a link volume again Link Setting m Volume Setting Link volume Destination volume Number OS Type Logical Disk Name Number OS Type Logical Disk Name O001bh WN DBSvr01l_LVOO1B x 0007h WN DBSvr01l_svo007 J View Base volume m Specific Access Mode R W Permit C Read Only Not Ready Not Available Access to destination volume is attained via link volume after a link setting Figure 5 93 Link Setting Volume Setting The Link volume field displays an unconnected link volume and the Destination volume field displays an active snapshot volume that is not connected to any link volume If there is no volume for which link setting can be executed Without correspondence is displayed Select the logical disk for which link setting is to be executed 10400422 002 02 2013 2013 Overland Storage Inc 45 91 SnapSAN 3000 S5000 Snapshot User Guide If you check View Base volume under the Destination volume field the following confirmation dialog is displayed Clicking Yes changes the display of the Destination volume field to that o
3. RemoteDataRep ication SS a OyramicDataRep ication R F Permit R T Permit R Y Permit Green Light blue Blue Yellow 5 DynamicDataRepl icat ion PV Ist layer 2nd layer 3rd layer Figure 5 104 Color Layers To distinguish the upper most MV in a hierarchical structure from other MVs it is called a Primary Volume PV 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 102 SnapSAN 3000 S5000 Snapshot User Guide Connection Line of Volumes A line that connects each volume indicates the connection state of volumes and is displayed as a pipe as shown below During copy operation an arrow the color of the disk on a connection line indicates the copy state moving from the copied volume to the copy destination e For Snapshots Active Inactive Restore is being executed Deletion is being executed C Active and Inactive are displayed altemately For Volume Cloning Replicate is executed Replicate is complete Restore is executed Restore is complete E E Separate is executed Separate is complete a e For Replication and Mirrormg Replicate is executed Replicate is complete Restore is executed Restore is complete Separate is executed Separate is complete L a E Figure 5 105 Connection Link of Volumes 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 103 SnapSAN 3000 S5000 Snapshot User Guide Display of Link State The link states of link volume
4. Display Description Normal Indicates a state other than below Indicates the state that data is being restored from snapshot Restoring volume to base volume Restore fault Indicates the restore fault state SV fault Indicates the snapshot fault state Capacity GB Displays the capacity of the logical disk Partition Name Displays the name of partition to which the base volume belongs This column is not displayed for disk arrays for which VirtualStoragePartitioning has not been purchased SV Pool Number Displays the number of the pool to which the snapshot volume set in the base volume belongs in hexadecimal SV Pool Name Displays the name of the pool to which the snapshot volume set in the base volume belongs SV PD Type Displays the physical disk type configuring the pool to which the snapshot volume set in the base volume belongs 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 10 SnapSAN 3000 S5000 Snapshot User Guide Display Description FC Indicates an FC disk ATA Indicates an ATA disk SAS SED Indicates a SAS SED disk NLSAS Indicates an NLSAS disk Number of SVs Displays the number of snapshot volumes set in the base volume Number of Active SVs Displays the number of snapshot volumes set in the base volume whose snapshot status is active Number of Cancelled SVs Displays the number of snapshot volumes set in the base volume whose snapshot status is released Snapsh
5. When creating a generation you must specify SVs disk so that they have one to one correspondence with logical disks making up the volume group Logical Disk Volume Group Disk Pool Logical Disk Logical Volume Figure 2 6 LVM Disk Generation Creation and Replication Saving the BV Volume Group Setting Information Save the BV volume group setting information vecfgbackup dev vg01 10400422 002 02 2013 2013 Overland Storage Inc 42 12 SnapSAN 3000 S5000 Snapshot User Guide System Configuration When using VxVM This section describes volume binding and necessary preparations when you use VxVM VxVM Configuration The VxVM logical volume configuration is shown Logical Disk BV Logical Volume 2 GB Idev sda J Volume Manager Disk VM Disk disk01 Disk Group Group of VM Disks Volume vol1 He Figure 2 7 VxVM Configuration Creating a file system application server Bind a file system used for applications if necessary Bind a file system by entering the following In this example VxFS is used as a file system mkfs t vxfs dev vx dsk dg01 vol1 Creating a generation application server Check that a snapshot generation and link volume have been created for BV When creating a generation you must specify SVs disk so that they have one to one correspondence with logical disks making up the disk group 10400422 002 02 2013 2013 Overland Storage Inc 42 13 SnapSAN 3000 S5000 Sn
6. When the actual used capacity of the original volume is large the actual used capacity of the target volume increases rapidly For this reason be careful about the free capacity of the pool to which the target virtual capacity logical disk belongs when BV or SDV is operated in that virtual capacity logical disk If the actual capacity of the pool in SRA SDV is insufficient a write error may occur because the data is delivered to SRA SDV from BV As the BV is in the snapshot fault state at this moment SV and LV and SRA SDV must be established again If the actual used capacity exceeds the LD capacity quota value for the virtual capacity logical disk including BV when data is restored from SV the operation fails with a restore fault To resolve this restore fault it is necessary to review the LD capacity quota value of the virtual capacity logical disk in the BV If the actual capacity of the pool to which the BV belongs is insufficient it is necessary to review the actual capacity of the pool by adding more logical disks as needed or otherwise After reviewing you must restore data again from the SV in which the restore fault occurred Using SSD For the snapshot function even if the physical disks that make up volumes are SSDs Solid State Drives there are no operation restrictions However to fully utilize the SSD performance characteristics both BV and SRA SDV must consist of SSDs For an operation that involves m
7. is displayed for the generation number at snapshot fault Generation Attribute Displays the generation attribute of the snapshot This item is shown when the snapshot is active or being restored Display Description Normal Indicates a normal generation Indicates a generation with the derived attribute by Derived restoration Used Capacity GB Displays the amount of snapshot capacity used This item is shown when the snapshot is active or being restored Restore Different Value GB Displays the amount of difference caused before restoration is completed This item is shown when the status is restoring LV Number Displays the logical disk number of the link volume in hexadecimal This item is shown when there is a volume link LV OS Type Indicates the OS type of the link volume This item is shown when there is a volume link For information about the displayed type refer to BV OS Type in Base volume list LV Logical Disk Name Displays the logical disk name of the link volume This item is shown when there is a volume link LV Mode Displays the access restriction of the link volume This item is shown when there is a volume link 10400422 002 02 2013 2013 Overland Storage Inc lt 5 21 SnapSAN 3000 S5000 Snapshot User Guide Display Description R W Permit Indicates the volume can be read and written from the operating host Read Only Indicates the volume can only be read fr
8. Unmounting a volume iSMrc_umount mvol Volume 37d84cca 2507 11d5 a0f7 00004c714491 5 Releasing a link iSMsc_unlink lv lv001 lvflg ld Returning to normal operation Execute Snapshot e When the partition contains an error execute snapshot referring to Preparing Volume Invalid Product If the product for snapshot has not been purchased or if it does not match the total physical capacity of the disk array the snapshot does not function properly If the products are not purchased properly the icon on the Snapshot screen tree view changes to indicate missing products or products not purchased For purchased products check disk array Properties in the State Monitoring screen Collecting Information of Error of Unknown Cause When an error whose cause is unknown has occurred and you want to request the provider to investigate the error you must collect information required for error analysis e Fault by SnapSAN Manager operation e For SnapControl error Follow the steps below to execute the command and collect the operation trace and other fault information at a time A disk for storing fault information must have at least about 4 MB of unused space The total size of fault information files differs depending on the system status and it may exceed 4 MB It is advisable to allocate an unused space of enough size 1 Log on as a member in the Administrator group 2 Click the Windows Start button and select ControlC
9. 1 MB Example 2 When the user specified capacity is 2044 GB In this case SDV 0 capacity 2046 GB and SDV 1 capacity 2 MB which requires correction SDVA 2046 GB 254 MB Data area 2044 GB Example 3 When the user specified capacity is 2045 GB SDVA0 2046 GB SDV l 1GB 2MB Data area 2045 GB Example 4 When all the free space of the pool is specified free pool space 2000 GB 1 SDV 20GB 10400422 002 02 2013 2013 Overland Storage Inc 47 2 SnapSAN 3000 S5000 Snapshot User Guide Snapshot Reserve Area Data area 2000 GB 2 GB 1 MB 1 Indicates maximum capacity of LDs that can be bound in the pool Even if there is no LD in the pool 256 MB of space is necessary for the management area for logical disks meaning this capacity 2000 GB 256 MB For information about the pool capacity and logical disk capacity refer to Appendix E of the Configuration Setting Tool User s Manual GUD About Expansion from iSM The snapshot reserve area can be expanded after binding With iSM expanding the snapshot reserve area is equivalent to expanding the existing SDV space However since the maximum SDV capacity is 2046 GB expanding the snapshot reserve area beyond this limit requires binding new SDVs as described in A 2 About Binding from iSM In the following examples the size of the management area per SDV is 1 MB Example 1 When expanding the snapshot reserve area by adding the user spec
10. 10400422 002 02 2013 2013 Overland Storage Inc 45 33 SnapSAN 3000 S5000 Snapshot User Guide When adding disks When adding physical disks to expand the snapshot reserve area perform the configuration setting in accordance with the following procedure Start Configuration Setting Expand Pool Capacity Add physical disks to the bound pool to expand its capacity Expand the snapshot reserve area for the expanded pool Expand Snapshot Reserve Area If necessary adda snapshot generation to the expanded pool End Configuration Setting When rebinding a snapshot volume When the snapshot related volumes need to be rebound because of a failure or for some other reasons perform the configuration setting in accordance with the following procedure Start Configuration Setting Stop access marage ment for a volume for which access Stop Access Manage ment P gement cae Unbind the t tion Urbind Generation ae Unbind the faultybase volume link volume and snapshot Unbind Logical Disk ORD eg Release Snapshot Related Volumes Unbind Pool Unbind the fultypool Recover fiom Fahne Take action to recover from the failure Re bind the pool logical disk and other resources End Configuration Setting 10400422 002 02 2013 2013 Overland Storage Inc 45 34 SnapSAN 3000 S5000 Snapshot User Guide Binding the Snapshot Reserve Area The work of binding the SRA Snapshot Reserve Area is done using the
11. BV Restoring Retry after restoration is completed There is no snapshot volume for which cyclic creation can be executed Prepare an inactive snapshot volume or a snapshot with a generation number that is not guarded and connected to a Impossible SV link volume and then retry Snapshot Deleting Retry after snapshot deletion is completed Monitoring Suspended Retry after restarting the monitoring of the disk array 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 71 SnapSAN 3000 S5000 Snapshot User Guide Unexecutable Information Action Freezing Retry after defreezing the replication function Replication Operating This operation cannot be executed during the replication operation Restore fault This operation cannot be executed because a restore fault occurred in the target base volume SV fault This operation cannot be executed because a snapshot fault occurred in the target base volume BV Data Being Migrated Retry after data migration is completed Clicking the Execute button displays the following confirmation dialog 08225 Snapshot cyclic creation wil be executed Tt is deleted when the snapshot is already created Wil you execute Proceed the execution Is BV secured a pause point and consistent as a volume Figure 5 66 Cyclic Creation Execute Clicking the Yes button displays the following dialog indicating the system is during processing Proc
12. Choose volume which you want to execute from list then click Execute button It is possible that multiple volumes are chosen and executed Figure 5 90 Guard Cancel From the list select the snapshot volume whose snapshot guard you want to cancel and then click the Execute button You can specify two or more volumes at a time and execute the operation for all of them simultaneously Unexecutable volumes cannot be selected Selected Volume List This part of the screen displays a list of the information about the snapshot volume selected from the information list display area If Unexecutable is shown in the Execution Result field the volume does not meet the execution conditions and therefore cannot be selected If there is any unexecutable volume refer to the Unexecutable Information and take one of the following actions Unexecutable Action Information SV Guard Cancel The guard has already been canceled Monitoring Suspended Retry after restarting the monitoring of the disk array 10400422 002 02 2013 2013 Overland Storage Inc 45 89 SnapSAN 3000 S5000 Snapshot User Guide Unexecutable Action Information Freezing Retry after defreezing the replication function This operation cannot be executed because a restore Restore fault fault occurred in the target base volume This operation cannot be executed because a snapshot SV fault fault occurred in the target base volume Summary Deta
13. Copy Control State Copy Mode i Separated start 2007 01 10 15 04 57 Separated stop 2007 01 10 15 04 57 StorageS4900_3 StorageS4900_3 Oceah WN LDS_49_3 2 OcdTh WN LDL_49 3 1 Guard Status Active Creation Time 2006 12 21 17 06 52 Generation Number Derived Storage54900_3 Ocebh WN LDS_49 3 1 1 36 GB 17 40 MB S Status Restoring Creation Time 2007 01 11 14 40 38 Generation number 1 Normal Restore start 2007 01 11 15 04 57 Remaining copy time 1m 20s Figure 5 102 Connection Disk Array Name Displays the name of the disk array where the volume exists or SAA The disk array name of the volume selected to display the Connection screen is highlighted 10400422 002 02 2013 2013 Overland Storage Inc 45 98 SnapSAN 3000 S5000 Snapshot User Guide Logical Disk Number Format Logical Disk Name Displays them in the form of logical disk number format logical disk name or VAA The logical disk number format and logical disk name of the volume selected to display the Connection screen are highlighted Copy Progress Displays the progress of copy This display disappears when copy is complete Progress may not change if I O load is too heavy If a link failure occurs Progress may not change Access Mode Displays the access mode of the link volume and RV The access modes are as follows Mode Description R W Permit The volume can be read and written from t
14. Disk array Component list Collection of base volumes Base volume list Collection of snapshot volumes Snapshot volume list Collection of link volumes Link volume list Collection of pools Pool list Base volume unit list Base volume Volume list related to the selected base volume Pool Snapshot volume list per pool The items displayed in the list are described below Disk Array List Disk Array Subsystem Name StorageS4900 001 ff Storages4900 002 Figure 5 7 Disk Array List The disk array list displays the information about the items described below Double clicking an item switches the display to the list one level below the currently displayed one 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 7 SnapSAN 3000 S5000 Snapshot User Guide Disk Array Subsystem Name The names of disk arrays that are being monitored by SnapSAN Manager and that can use the snapshot functions are displayed Disk arrays for which Snapshots has not been purchased are not displayed In addition for a partition user disk arrays for which VirtualStoragePartitioning has not been purchased and disk arrays without partitions to which the authority is given are not displayed Icon 5 Description z sit Indicates that the disk array is operating normally Indicates that the Snapshots disk capacity is insufficient Indicates that the snapshot has been released because of insufficient SRA capacity Indica
15. It is better to set the disk array subsystem names port names and logical disk names according to the operating conditions and server connection conditions When you use the snapshot function you do not need to note disk array names and port names For the OS type of a logical disk you need to note the following e The OS type of SDV cannot be set e The OS type of BV must be appropriate for the supporting platform e The OS types of SV and LV are set in the same type as BV at volume binding e After creation of the generation you cannot change the OS types of BV and SV LV These settings are performed from an SnapSAN Manager client For details on the operation procedure refer to the User s Manual UNIX 10400422 002 02 2013 2013 Overland Storage Inc 42 6 SnapSAN 3000 S5000 Snapshot User Guide System Configuration Setting a disk array name for administrating database of customers Disk Array Subsystem S5000 Disk Array Subsystem Name Customer_DataBase Port Names Director Number Port Number Port Name Connected Server OOh OOh DB_SECONDARY Application server Oth OOh DB_PRIMARY OOh Oih BACKUP_PRIMARY Backup server Oth Oth BACKUP_SECONDARY Setting Logical Disk Names and OS Types LD No OS Type Logical Disk Name Remarks 0000h LX DB_DATA_BV BV for DB data file oooh DB_REDO1_BV BV for DB REDO file 1 o002h DB_REDO2_BV BV for DB REDO file 2 0003h_ DB_CTL_B
16. Poci Nome T PO Type namber of 9v3 T ante of Acme Ses T Number of Carcnted Srs Capaotyf a Ured Capactyi i T Snapshot Capact fai Snapshet Used Capac Gt T Snapshot Deeshok ce wooh K s o mao ET 20 i 10 Figure 5 12 Pool List The pool list displays the information about the following items of the pool to which the snapshot volume belongs Double clicking an item switches the display to the list one level below the currently displayed one Pool Number Displays the pool number in hexadecimal Icon Description p Represents a pool If a threshold excess occurred in pool the icon changes to 5 Pool Name Displays the pool name PD Type Displays the physical disk type configuring the pool 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 15 SnapSAN 3000 S5000 Snapshot User Guide Display Description FC Indicates an FC disk ATA Indicates an ATA disk SAS SED Indicates a SAS SED disk NLSAS Indicates an NLSAS disk Number of SVs Displays the number of snapshot volumes belonging to the pool Number of Active SVs Displays the number of snapshot volumes belonging to the pool whose snapshot status is active Number of Cancelled SVs Displays the number of snapshot volumes belonging to the pool whose snapshot status is released Capacity GB Displays the capacity of the pool For the virtual capacity pool displays the actual capacity Check the capacity of the virtu
17. Summary Details Retry after data migration is completed Clicking the Execute button displays the following confirmation dialog 08226 Snapshot creation will be executed It is deleted when the snapshot is already created Will you execute Is BY secured a pause point and consistent as a volume Figure 5 74 Creation Confirmation Clicking the Yes button displays the following dialog indicating the system is during processing 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 77 SnapSAN 3000 S5000 Snapshot User Guide Processing O3a8h CX SC_BV_SVO3A8 Figure 5 75 Processing The Processing dialog displays information for the snapshot volume currently being processed Clicking the Cancel button displays the following dialog From this dialog you can suspend cyclic snapshot creation and return to the Snapshot Management screen for other operations You can also check the object snapshot state of the selected base volume from the information list display area of the Snapshot Management screen 08423 Snapshot creation operation was canceled during the process The state of selected snapshots can be checked by the snapshot screen Figure 5 76 Cancellation If a snapshot has already been created for the target snapshot volume the following confirmation dialog is displayed after the Yes button is clicked 08623 The snapshot is created by snapshot volume 000ch WN DBSvr01_SVO00C W
18. Volume 37d84cca 2507 11d5 a0f7 00004c714491 specify as shown below MOUNTVOL H Volume 87d84cca 2507 11d5 a0 7 00004c714491 3 Repairing the file system The file system may contain conflicting data Execute CHKDSK F to repair the file system Example of executing CHKDSK Omit the at the end of the mount point volume name in specifying it for CHKDSK CHKDSK Volume 37d84cca 2507 11d5 a0f7 00004c714491 F You can specify a drive letter in this step CHKDSK H F Illegal File System on SV LV Snapshot creation without unmounting SV LV may result in illegal file system If snapshot file system has become illegal restore the system by the restoration procedures Research method e When an error occurs in using the SnapControl or an access program If the SnapControl command outputs the following error message or errors meaning destroyed file or disk the snapshot file system is illegal Restore the file system by the restoration procedures iSM13639 Specified path is not normal status e Ifbackup server is allowed to access snapshot during unmounting operation Access to SV LV which is in the Not Ready state during unmounting operation is not allowed normally Try to access to SV LV volume during unmounting operation from My Computer 10400422 002 02 2013 2013 Overland Storage Inc 44 19 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault ioixi File Edit View F
19. e Specify a disk name based on the BV name in the following format logical disk name to which generations are added_SV logical disk number When the specified disk name exceeds 16 characters the dialog box to select the portion to be used is displayed 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 51 SnapSAN 3000 S5000 Snapshot User Guide e Specify an arbitrary name by adding a logical disk number to the specified prefix The logical disk name must be unique within the system no other logical disk must have the same name The OS type is the same as that of the base volume and does not need to be specified The logical disk name can be changed later by selecting the Logical Disk Logical Disk Management Change Settings When naming a logical disk make sure that the name conforms to the following rules A nonconforming name cannot be set e Length of the namel to 24 characters e Specifiable characters Alphabetical lettersA to Z a to z Case sensitive Numbers 0 to 9 Under bar _ Slash All characters must be 1 byte in size If the attempt to name the logical disk at the time of binding fails a 20 character long logical disk name is set that consists of the disk array specific 16 character string followed by a four digit hexadecimal logical disk number Completion dy Comeration Addiction Figure 5 40 Generation Addition Successful The snapshot addition result is displayed Whe
20. 3 222 225 472 Bytes Specity a threshold by the ratio or capacity Patio 11 99 s s Capacity 1 20 16 Snapshot reserve area capacity 20 21 474 836 480 Bytes Snapshot threshold 16GB ow 17 179 869 184 Bytes f K cence Help Figure 5 49 Confirm Advance Settings In this screen the detailed settings for a snapshot reserve area are specified Specify a threshold by the ratio or capacity Specify the threshold for the snapshot reserve area by using either of the following methods e Ratio Specify the threshold as the ratio to the snapshot reserve area capacity e Capacity Specify the threshold as the capacity of the snapshot reserve area When the snapshot usage exceeds the specified threshold a warning is issued to SnapSAN Manager 10400422 002 02 2013 2013 Overland Storage Inc 45 59 SnapSAN 3000 S5000 Snapshot User Guide Completion Gy Capacity Expansion Snapshot Reserve Area Expansion gt Confirmation gt Completion fi Snapshot reserve area expansion succeeded Click a following link if necessary Add generation Click Finish to exit Monitoring of the disk array resumes Figure 5 50 SRA Expansion Success The capacity expansion result is displayed When the processing succeeded the following links are displayed e Add generation Opens the Generation Addition screen Finish button Returns to the monitoring screen Changing the Snapshot Threshol
21. LDN h OS Type LDName LD Capacity 0000 Po010001_SDV0000 68 0G8 Snapshot Pool Detail Information Displays the detailed snapshot information about the specified pool Pool No h Displays the pool number Pool Name Displays the pool name Pool Type Displays the pool type Node No h Displays the node number of the pool PD Type Displays the PD type configuring the pool Threshold Displays the threshold state Total Snapshot Capacity Capacity of the snapshot reserve area Used Snapshot Capacity Snapshot capacity used Snapshot Threshold Snapshot threshold Snapshot Control Capacity Capacity for snapshot control SDV List Displays a list of information about the snapshot area associated with the specified pool LDN h Displays the LD number OS Type Displays the OS type of each LD LD Name Displays the arbitrary ID information logical disk name of each LD acquired from the disk array LD Capacity Displays the LD capacity Node No h is displayed only for the disk arrays with nodes Tf the specified snapshot pool does not exist the following error message is displayed 11183 Snapshot Pool doesn t exist Snapshot Configuration Information File Output Function The disk array configuration information can be obtained as a text format or CSV format file using the SnapSAN Manager Configuration Setting screen configuration display command iSMview and configuration information file output command iSMcsv The
22. The on line backup reserves a logical static point in combination with log The log is used upon recovery For executing cold backup or using snapshot for files other than database requires considerations similar to those for usual files Microsoft SQL Server Use of the ReplicationControl SQL Option allows producing backup data even in business operation Refer to the ReplicationControl SQL Option User s Manual for details In the cases above also backup of transaction logs is made via network Using snapshot for transaction log requires considerations similar to those for usual files Halting database and making backup physically requires considerations similar to those for usual files The backup data made in such process cannot be used for transaction log Snapshot Creation and Data Consistency SV When using SV LV file on backup server and creating snapshot again cache data on backup server must be discarded To discard cache data flush the cache data and unmount the SV LV using the commands provided by snapshot operation You can use the force option to forcibly unmount the SV LV even when the file system is being used If the process above is omitted inconsistency may occur between cache and volume upon setting LV link again which may result in destruction of file system Restoration and Data Consistency When restoring data upon failure on BV of application server backup data existing on tape is utilized in
23. WORM User Guide Display Description SSD Indicates that the physical disk type is SSD SAS SED Indicates that the physical disk type is SAS SED NLSAS Indicates that the physical disk type is NLSAS Target Name Displays Target information in the logical disk Menu Item List This section describes the items on the menu bar of the Volume List Display screen File menu Eile View Operation Help Create Update Volume List Create Update Volume List Create Update the Volume List CSV Output of Information List E ER CSV Output of Information List Properties CSV Output of Information List Exit Alt F4 Properties Displaymg Property Information of Volume List Exit Startmg Termmatmg Volume List Display View menu View Operation Help v Toolbar v Status Bar Toolbar View Hide Toolbar ate Display Information F5 Status Bar Sail View Hide Status Bar Update Display Information Updating Display Information Operation menu Operation Help Define Control volume Define Control Volume Defmmg Control Volume Help menu Help List Display Screen Help F1 List Display Screen Help Ame Displays mformation about the Volume List About Display screen About Displays mformation about the version Starting Terminating Volume List Display This section describes the procedures for starting and terminating the Volume List Display funct
24. generation Status snap_status YYYY MM DD hh mm ss Description ld_name Logical disk name type OS Type volume name Mount point volume name 10400422 002 02 2013 2013 Overland Storage Inc 46 56 SnapSAN S3000 S5000 Compliance WORM User Guide path Drive letter or path name mounted to the folder of the NTFS volume accessed by users generation SV relative generation number snap_status SV snapshot status YYYY MM DD hh mm ss Snapshot creation time On the UNIX system iSMsc_svguard Info 1SM19040 iSMsc_svguard has normally terminated BV ld_nametype Special File special file name SV ld_nametype Generation generation Status snap_status YYYY MM DD hh mm ss Description ld_name Logical disk name type OS Type special file name Special file name generation SV relative generation number snap_status SV snapshot status YYYY MM DD hh mm ss Snapshot creation time Execution Conditions To perform snapshot guard classification setting cancellation the following conditions must be satisfied e The SV corresponding to the target BV is bound in advance e The activity state of the target volume is snapshot active being restored or being prepared for restoration e The disk array storing the target volume is not in the freeze state The following notes do not apply to joint operation with iSM e The target BV is registered in the volume list e Ifthe target BV is not registered in the volume
25. i j Separation j Restoration z P v Executable Unexecutable Being restored includes three states restoration in progress restore preparing and restore suspended Copy mode of Volume Cloning and Remote Replication and creating a snapshot When Volume Cloning Remote Replication and the snapshot function are used concurrently to create an RV snapshot there are the following notes and restrictions If RV is set as BV only the Background Copy mode can be used for replication to the RV If RV is set as BV only Restore protect can be used for restoration from the RV to MV Large Capacity Volume When using the snapshot function the capacity of a volume that can be used as a base volume BV or snapshot volume SV is limited This capacity is referred to as the maximum support capacity and varies depending on the disk array types All the disk arrays that support the snapshot function can build and use the volumes whose capacities are less than 2 TB as the BV or SV For the large capacity volumes exceeding 2 TB the disk arrays that support 2 TB or more as the maximum support capacity can build and use the volumes whose capacities are within the maximum support capacity as the BV or SV For the data replication function large capacity volumes larger than 2 TB can be paired in a disk array which supports volumes of 2 TB or more Such a large capacity volume can be used as a base volume BV within operation
26. registered as a control volume because it may enter the Not Ready state during operation The control volume setting procedure differs depending on the disk array functions as shown below Disk Arrays Identifying the Control Volume Attribute Create or update the volume list when the logical disk built as a control volume is connected to the server and recognized as a disk by the system The disk array identifies the logical disk having the control volume attribute from the logical disks connected to the server and automatically registers it in the volume list To create or update the volume list refer to Volume List Creation After creating or updating the volume list list the control volumes using the iSMvollist command to check that the control volume has been successfully registered in the volume list iSMvollist ctl Other Disk Arrays It is necessary to select the control volume from the logical disks connected to the server and describe it in the control volume definition file on the server for definition Describe the logical disk number LDN and disk array name of the logical disk to be used as a control volume in the control volume definition file You can check the information on the logical disk by using the iSMrc_ldlist command This information includes the list of disk arrays connected to the server disk array names list of logical disks in each disk array and logical disk numbers e To display the list of disk
27. v 15 iSMrc_signature Signature Performs operation regarding the v Operation signature of each disk 16 iSMrc_scan Disk scanning Scans for detecting available disks v 17 v Targeted Not targeted Notes e All commands can be used after SnapControl has been installed e Command No 1 can be used also for SnapSAN Manager and ReplicationControl e Commands No 11 to No 17 can be used also for ReplicationControl 10400422 002 02 2013 2013 Overland Storage Inc 46 2 SnapSAN S3000 S5000 Compliance WORM User Guide e In the above table UNIX refers to all the UNIX systems that SnapControl supports such as HP UX Solaris and Linux e On the Windows system operations are allowable only for a user who belongs to the Administrators group e On the UNIX system operation authority is given to a super user immediately after the installation The volume list can be created only by the super user other operations however can be performed by anybody by changing the authority to access commands and directory operations e When SnapSAN Manager is operated together I O issue to a disk array is controlled via SnapSAN Manager joint operations are possible for commands from No 2 to No 12 Operation Types To use SnapControl the following operations can be selected Direct operation for a disk array This operation performs directly to a volume BV or LV connected to the server and recognized by OS This operatio
28. you can restore the image using any SV If a snapshot is restored when a large capacity volume is used the state temporarily transits to restore preparing before transiting to restoration in progress BV can be accessed with the SV image during restoration In addition BV can be updated during restoration and SV to be restored is not affected There are two operation modes for restoration Derived SV auto delete mode When restoration is executed a snapshot of which generation is later than the restored generation is deleted Derived SV keep mode Snapshots including those of which generations are later than the restored generations are kept A snapshot can be restored by command operation from a server on which SnapControl is installed or by GUI operation with iSM 10400422 002 02 2013 Cae 3rd generation time 1 Figure 3 11 Restoration 2013 Overland Storage Inc 43 12 SnapSAN 3000 S5000 Snapshot User Guide When a restore fault occurred it is necessary to reexecute the restoration from the SV that is in the restore suspended state To restore a snapshot the following conditions need to be satisfied e The relationship between the BV and SV to be operated is established e The activity state of the BV and SV to be operated is in the snapshot active state e The activity state of other SVs set to the BV to be operated is not being deleted restored or prepared for restoration e In the derived SV a
29. 002 02 2013 2013 Overland Storage Inc 46 66 SnapSAN S3000 S5000 Compliance WORM User Guide e Specification of the volume Specify the target volume Specification of the volume vol volume volflg vol_flg Specify the volume and volume type e Display of the attribute information attr Displays the logical disk attributes and link status of the link volume LV e Displaying data protection information protect Displays the logical disk attributes in the WORM function Displayed Information The iSMrc_sense command displays the following information On the Windows system Displayed Information When the attr option is specified Disk No disk_number LD Name Id_name VAA vaa Type type Volume Name volume_name Path path Attribute attribute LV Link Status link_status When the protect option is specified Disk No disk_number LD Name ld_name VAAv aa Type type Volume Namev olume_name Path path Protection Information Protection State protection_state Begin Date begin_date Retention Date retention_date Retention Mode retention_mode Reinitialize reinitialize_state 10400422 002 02 2013 2013 Overland Storage Inc lt 6 67 SnapSAN S3000 S5000 Compliance WORM User Guide 10400422 002 02 2013 attribute link_status protection_state retention_date retention_mode reinitialize_stats Physical disk number Logical disk name VAA Volume Absolute AVolume Cloningess OS Ty
30. 2013 2013 Overland Storage Inc 46 53 SnapSAN S3000 S5000 Compliance WORM User Guide bv_type BV OS Type special_file_name Special file name by_state BV state Type SV OS Type LdName SV logical disk name n Snapshot generation number Only is displayed for the SV that became a derived generation until a new generation number is given by recreating a snapshot snap_status SV snapshot status YYYY MM DD hh mm ss Snapshot creation time link_sts SV link status Detailed information when the detail option is specified BV Information LD Name bv_ld_name Type bv_type Special File bv_special_file_name State bv_state Pair Information SV LD Name sv_ld_name Type sv_type Generation n Snap State aaaaaaaa YYYY MM DD hh mm ss lt State gt Start Time YYYY MM DD hh mm ss lt State gt End Time YYYY MM DD hh mm ss Processing Data Size bbbbbbbbKB Snapshot Data Size ddddddddKB SV Guard preserve_mode LV Link Status link_sts LV LD Name lv_Id_name Type lv_type Special File lv_special_file_name LV Access access_mode Description bv_Id_name BV logical disk name 10400422 002 02 2013 2013 Overland Storage Inc 46 54 SnapSAN S3000 S5000 Compliance WORM User Guide bv_type BV OS Type bv_special_file_name BV special file name bv_state BV state sv_Id_name SV logical disk name sv_type SV OS Type n Snapshot generation number aaaaaaaa SV snapshot status YYYY MM DD
31. 2013 Overland Storage Inc 46 45 SnapSAN S3000 S5000 Compliance WORM User Guide Displayed Information The iSMse_restore command outputs the following messages afterrestoring a snapshot On the Windows system iSMsc_restore Info iSM19030 iSMsc_restore has normally terminated BV id_name type Volume Name volume name Path path SV id_name type Generation generation Status snap_status YYYY MM DD hh mm ss Description ld name Logical disk name Qpe OS Type volume name Mount pointvolumename path Drive letter or path name mounted to the folder ofthe NTFS volume accessed byusers generation SV relative generation number smap_status SV snapshot status YYYY MMODD hh mm ss Snapshot creation time On the UNIX system iSMsc_restore Info iSM19030 iSMsc_restore has normally terminated BV id_name type Special File special fiie name SV id_name type Generation generation Status snap_status YYYY MM DD hh mm ss Description Id name Logical disk name Qype OS Type special fils name Special filename generation SV relative generation number snap_status SV snapshot status YYYY MMDD hh mm ss Snapshot creation time Execution Conditions To perform snapshot restoration the following conditions must be satisfied 10400422 002 02 2013 The SV corresponding to the target BV is bound in advance The activity state of the target volume is snapshot active The activity state of other SVs set in the speci
32. 6 of 3 10 Management and Operations of Snapshot 2 Setting a link If a link is released execute the following command iSMsc_link lv lv001 lvflg ld sv bv001 1 svflg ld relgen 3 Recognizing the SV LV again Execute the following command to make the operating system recognize SV LV volume iSMrc_scan 4 Resetting the drive letter Set again the drive letter Check the volume list and reset the SV LV drive letter that was set before the restart You can reset a drive letter on the Disk Management screen or by executing the iSMrc_mount command iSMrc_mount mvol Volume 37d84cca 2507 11d5 a0f7 00004c7144913 drv H 5 Unmounting a volume and releasing a link After recognizing a disk execute the following operations to return to normal operation Writing data to the file system buffer iSMrc_flush mvol Volume 37d84cca 2507 11d5 a0 7 00004c714491 Unmounting a volume iSMrc_umount mvol Volume 37d84cca 2507 11d5 a0f7 00004c714491 Releasing a link iSMsc_unlink lv lv001 lvflg ld 6 Returning to normal operation Execute Snapshot referring to 2 2 Operations Management and Operations of Snapshot e You can execute snapshot operations such as snapshot creation and restoration by using the SnapSAN Manager s snapshot control function However the operations from SnapSAN Manager are asynchronous with business operation and trouble may occur To execute these snapshot operations therefore use the
33. BV or the SV currently linked with it is unlinked For the volume types refer to 4 3 Volume Types Displayed Information The iSMsc_unlink command outputs the following messages Common to Windows UNIX 10400422 002 02 2013 2013 Overland Storage Inc 46 59 SnapSAN S3000 S5000 Compliance WORM User Guide iSMsc_unlink Info iSM20030 iSMsc_unlink has normally terminated Execution Conditions To execute the unlinking operation the following conditions must be satisfied e The specified volume is linked e The disk array storing the target volume is not in the freeze state e The specified LV is unmounted from the host UNIX only The following notes do not apply to joint operation with iSM e The target LV is registered in the volume list e The volume list is not being created e TheiSM only special file is not being created HP UX system and Linux system only Link State Display Command The iSMsc_linkinfo command is used for displaying the link state Main Options For the iSMsc_linkinfo command you can specify the following options Specification of the target volume Specify the volume and volume type of the LV or the destination volume For the volume types refer to 4 3 Volume Types Specification of whether or not to display the link control list Specify whether or not to display the link control list Displayed Information The iSMsc_linkinfo command displays the following information
34. Canceling the Snapshot Guard Help Snapshot Operation ieee eum Link Setting Setting a Link Uplink Unlinking Access Mode Change Changing Access Mbde AS Snapshot Help Fl Displays the help information about the snapshot screen Dialog List gt Displays the help information about the dialog list related to snapshot manage ment Figure 5 16 CSV Flow Information Displayed in Execution Dialogs The execution dialogs displayed for individual snapshot operations are described below Execution dialog for base volume operations The following execution dialog example of the Snapshot Cyclic Creation explains the execution dialog displayed for the base volume operations 10400422 002 02 2013 2013 Overland Storage Inc 45 29 SnapSAN 3000 S5000 Snapshot User Guide Snapshot Cyclic Creation r Frecution Reralt Unexecwtable Information BY Mumber BY 08 DY Logical Disk Wane S7 Mumbe When the snapshot is created by object mapshot veluse At As crested after deletion Choose volume which you wat te execute from List then click Exeowe button TS is possible that sultiple volumes are chosen and executed Figure 5 17 Cyclic Creation The information screen of the execution dialog displays the information about the items described below The information of each individual item is updated only when the Execute button is clicked Execution Result Displays t
35. Command trace file n generations older e Switch between generations The switch of command trace file generations occurs when the file size of the current generation exceeds the size defined by the environment variable If the maximum number of generations is reached the file of the oldest generation is deleted Volume List Creation Display The function to create and display the volume list associates logical disk information disk array side with system dependent information server side and displays the associated information Since it handles system dependent information the function on the Windows system is different from the function on the UNIX system On the Windows system operations are possible by using the GUI Graphical User Interface Command Operations Windows On the Windows system by using the volume list creation and display function by means of the iSMvollist command it is possible to obtain and display drive letter HBT host adapter number bus number target ID and LUN logical unit number physical disk number and logical disk names and associated OS type hereafter volume list of logical disks in the disk arrays The following is the description of the HBT e Host adapter number HBA This is the number for an interface card that connects a SCSI bus to the host system There are multiple buses in the host adapter e Bus number Bus This is the number for the path bus from the host adapter to a targe
36. Display Displays the Start Time and End Time when operation for a volume is performed Displays the transition time at the forced separation or fault occurrence Displays the estimate of remaining time before copy completion during Replicate Restore or Separate However is displayed for the time if the disk array to which MV belongs is not recognized by replication management The time is displayed at the forced separation only on the RV side even if replication management does not recognize the disk array to which MV belongs The estimate of remaining time may not be correct because it changes according to the monitoring timing the units the status of lines and so on Differential Quantity of Volume Displays remaining amount transfer rate during synchronization Protection of a snapshot Displays the protection state of a snapshot Disk Array Button When volumes in multiple disk arrays are displayed on the Connection screen disk array buttons are displayed at the top of the Connection screen When volumes in only a single disk array are displayed no disk array button is displayed When you select a disk array button the volumes which belong to the disk array are highlighted out of the volumes displayed on the Connection screen To cancel the highlight select the same button again Double clicking a volume works in the same way as selecting the button of the disk array to which the volume belongs Displayed Cha
37. Execution Conditions The SV corresponding to the target BV is bound in advance The following notes do not apply to joint operation with iSM e The target BV is registered in the volume list e Ifthe target BV is not registered in the volume list the following conditions must be satisfied e The LV linked to the target BV is registered in the volume list e Ifthe target BV is paired as the RV for replication the MV paired with the RV is registered in the volume list e The volume list is not being created e When specifying the combination of a volume group or a disk group with a logical disk name specify the same number of logical volumes as those constituting a volume or disk group on the side where the logical disk name is specified to the BV SV In this case waiting for the specified snapshot state is performed in the specified order e When a volume group is specified the target volume group is active e When a disk group is specified the target disk group is active e TheiSM only special file is not being created HP UX system and Linux system only Snapshot State Display Command The iSMsc_query command is used for displaying snapshot information Main Options For the iSMsc_query command you can specify the following options Specification of the target SV Specify the volumes of the BV and the SV to be created e Specification of the BV bv volume bvflg bv_flg Specify the volume and volume type of the BV
38. FC attribute ATA ATA attribute SAS SAS attribute SAS SED SAS SED attribute NLSAS NLSAS attribute Gi Smapshot LD List Link Control LD List LDN Displays the LD number LD Name Displays the arbitrary ID information logical disk mame of each LD acquired from the disk amay Snapshot Attribute Displays the smapshot volume attribut BV Basevolume volume from which a snapshot is copied sv Snapshot volume volume storing the information used to manaze differences in the BV at specific point of time LY Link volume virtual volume linked witha BV or SV to allow indirect access sv One typ of smapshot volume that does not have the information usai to mamaze differences in the BV Node No h Displays the node number of the LD PD Type Display either of the following as the type of the PD configuring the LD Fc FC attribute ATA ATA attribute SAS SAS attribute SAS SED SAS SED attribute NLSAS NLSAS attribute Node No h is displayad only for the disk amays with nodes 10400422 002 02 2013 2013 Overland Storage Inc 45 116 SnapSAN 3000 S5000 Snapshot User Guide Displaying Snapshot Information Displaying the List Information About a Snapshot Pool When the spl option is specified the command displays the list information about the snapshot pool of the specified disk array iSMview spl Storsge001 Snapshot Pool Information PoolNo h Pool Name Node No h PD Type Threshold 00
39. L Id 68 link information display 6 2 link setting 6 2 logical disk information display 6 2 6 4 logical disk name 6 8 M MBR format A 1 mdir 6 8 message ID 6 11 message text 6 11 2013 Overland Storage Inc 41 1 SnapSAN Snapshot 3000 S5000 User Guide mount point volume name 6 8 mvol 6 8 N NA 3 8 A 4 NR 3 8 A 4 NTFS folder name 6 8 P primary partition A 1 process number 6 10 R R W A 4 relative generation name 6 8 restoration from snapshot 6 1 restoration in progress 3 5 restore suspended 3 5 RO 3 8 A 4 rst exec 3 5 rst suspended 3 5 S sfn 6 8 signature operation 6 2 6 4 snap active 3 4 snap inactive 3 4 snapshot active 3 4 snapshot creation 6 1 snapshot deletion 6 2 snapshot inactive 3 4 snapshot information display 6 2 special filename 6 8 T time 6 10 type 6 10 U unlinking 6 2 10400422 002 02 2013 Vv vg 6 8 volume group name 6 8 volume list creation display 6 1 6 3 volume list display 6 2 6 4 volume mount 6 2 6 4 volume unmount 6 2 6 4 2013 Overland Storage Inc 42
40. LV Link Volume LV is a virtual volume that establishes connection with BV or SV and implements indirect access LV that a server can access can be linked with a different SV This enables access to any snapshot A list of BV or SV volumes link permit volume that LV can access is referred to as a link control list LCL 10400422 002 02 2013 2013 Overland Storage Inc 43 1 SnapSAN 3000 S5000 Snapshot User Guide CV Control Volume CV is a volume for controlling disk arrays When you use SnapControl this volume is needed for a server that uses LV SRA Snapshot Reserve Area SRA is an area for retaining SV differential data Whenever BV is updated the differential data for each update is accumulated You need to secure enough space before using snapshot SDV Snapshot Data Volume SDV is a logical disk that comprises SRA Function and Operation of Snapshot Snapshot provides the following functions related to snapshot volume operation Binding SV This function is used for creating and allocating the necessary number of SVs used for saving BV snapshot images After binding SVs you can change the number of created SVs Creating a Snapshot This function is used for specifying SV paired with BV and creating the BV snapshot image at the time in SV Restoration from a Snapshot This function is used for restoring the snapshot image created in SV to BV Deleting a Snapshot This function is used for deleting a snapshot
41. Name VAA OS Type HBT LUN Disk No Disk Array Volume Name Psth kin k_name vss type hbt lun disk_num disk_aray_name volume_name psth Descrintion ldn Logical disk number ld_name Logical disk mame yaa VAA Volume Absolute AVolume Cloningess type OS type hbt Host adapter number bus number target ID lun LUN disk_num Physical disk number disk_amay_name Disk ewsy name volume name Mount point volume name Drive letter or path name mountedin the NTFS volume folder accessed by a user A 2013 Overland Storage Inc 46 14 SnapSAN S3000 S5000 Compliance WORM User Guide 10400422 002 02 2013 Gv When the ai option is specified v Correspondence and configuration information about logical disks as shown below is listad Volume List iSMvollist Version X X XX LDN LD Name VAA OS Type HBT LUN Disk No Disk Array PD Type Volume Name Path kin k_name vss type hbt lun disk_num disk_srrsy_nsme pd_type volume_nsme psth Description X X XXX Information about the version of the executed iS Mvollist command ldn Logical disk number 1d_name Logical disk name vaa VAA Volume Absolute AVolume Cloningess type OS type hbt Host adapter number bus number tarzet ID lun LUN disk_num Physical disk number disk_amay_name Disk amay name pd type PD Type volume name Mount point volume name path Drive letter or path name mounted in the NTFS volume folder accessed by a user When the ctl option i
42. On the Windows system Specified Volume Information aa LD Name ld_name Type type Volume Name volume_name Path path State link_sts ld_name 10400422 002 02 2013 2013 Overland Storage Inc lt 6 60 SnapSAN S3000 S5000 Compliance WORM User Guide Mode access_mode Destination Volume Information bb ld_name2 type2 link_sts lid_name 2 access_mode2 Description Specified Volume Information Indicates that the displayed information is that of the specified volume If LV is specified the command displays the information of the LV If BV SV is specified it displays the information of the BV and SV aa Type of the specified volume LV BV SV ld_name Logical disk name type OS Type volume name Mount point volume name path Drive letter or path name mounted to the folder of the NTFS volume accessed by users link_sts id_name Link status If the link is established the name of the destination volume is displayed access_mode Access restrictions Destination Volume Information Indicates that the displayed information is that of a volume that can be linked with the specified volume If LV is specified the command displays the information of the BV or SV If BV SV is specified it displays the information of the LV This information is displayed only when the lcl option is specified bb Displays the volume type LV BV SV ld_name 2 Logical disk name type2 OS Type link_sts id_name 2 Link status If the
43. Operation of Operation Linked Disk Array with SnapSAN Manager iSMvollist Volume List Creation Display v2 iSMsc_create Snapshot creation et v 10400422 002 02 2013 2013 Overland Storage Inc lt 4 6 3 SnapSAN S3000 S5000 Compliance WORM User Guide Command Name Operation Direct Operation of Operation Linked Disk Array with SnapSAN Manager iSMsc_restore Restoration from snapshot yil Ve iSMsc_delete Snapshot deletion Waa 7 iSMsc_svguard SV guard classification vil 7 setting cancellation iSMsc_wait Snapshot state wait fl Z iSMsc_query Snapshot information display Yr Z iSMsc_link Link setting Y Z iSMsc_unlink Unlinking J 7 iSMsc_linkinfo Link information display VA 2 iSMrc_sense Volume List Display y Z iSMrc_lIdlist Logical disk information display vA s iSMrc_flush File system buffer flush v2 iSMrc_mount Volume Mount War iSMrc_umount Volume Unmount v2 p iSMrc_signature Signature Operation v2 z iSMrc_scan Disk scanning v2 z Not targeted V Available 1 If the control volume is not used the operation is available only from the server OS that recognizes BV 2 Only the volume of the system recognized by the server can be operated 10400422 002 02 2013 2013 Overland Storage Inc 46 4 SnapSAN S3000 S5000 Compliance WORM User Guide Direct Operation for a Disk Array For direct operation for a disk array you can select one of the following configurations for each server Direc
44. S5000 Snapshot User Guide Cancel button Displays a dialog box confirming your intention to quit the wizard Clicking the OK button returns to the monitoring screen If the configuration change of one of snapshot data volumes SDV configuring a snapshot reserve area is locked the threshold cannot be changed Unbinding Snapshot Generations The work of unbinding snapshot generations is done using the Generation Deletion screen in the wizard format as follows Generation Deletion The logical disk of which snapshot generations are unbound Confirmation Snapshot volumes to delete are displayed Check whether the settings are correct Completion The generation unbinding result is displayed Generation Deletion dy Consration Deletion Generation Deletion gt Confirmation gt Completion Waber or baro vorse m Mumber of generations to delete 1 2 Figure 5 53 SRA Expansion Wizard Select logical disk Select a logical disk of which snapshot generations are to be unbound from the list Pools that meet any of the following conditions cannot be selected no unbindable SV There is no snapshot volume that can be unbound locked Configuration change is locked Select deletion generation Specify the number of generations to be unbound 10400422 002 02 2013 2013 Overland Storage Inc 45 62 SnapSAN 3000 S5000 Snapshot User Guide Next button Proceeds to the Confirmation screen Cancel but
45. Snapshot Reserved Area Bind screen in the wizard format as follows Snapshot Reserve Area Bind A snapshot reserve area to bind is set up Confirmation The settings to bind a snapshot reserve area are displayed Check whether the settings are correct Advanced Click this button to make detailed Snapshot Reserve Area settings Completion The binding result is displayed Snapshot Reserve Area Bind Figure 5 21 Snapshot Reserve Area SRA Binding Select a pool Select a pool where you want to bind a snapshot reserve area Pools that meet any of the following conditions cannot be selected 10400422 002 02 2013 2013 Overland Storage Inc 45 35 SnapSAN 3000 S5000 Snapshot User Guide Condition Description lack capacity A pool with a port on which configuration setting operation guard is set PD rotation stop A pool in the rotation stop state by the eco mode A pool to be used by thin provisioning function which was bound on a disk Thin provisioning array that does not support the snapshot function Specify the capacity of the snapshot reserve area Specify the capacity of a snapshot reserve area to be bound Next button Proceeds to the Confirmation screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends A new snapshot reserve area SRA cannot be bound in the following pools A
46. The SnapSAN Manager snapshot management screen provides the following snapshot related operation and information display functions Note that executing the snapshot link operation requires that the user level of the client be operator or administrator e Snapshot creation deletion and restoration e Link setting and unlinking e Snapshot information display e Link information display The snapshot management screen consists of the configuration display area i displaying the disk array configuration and states on the left side of the screen and the information list display area ii on the right side of the screen that displays the information about the item selected in the configuration display area 10400422 002 02 2013 2013 Overland Storage Inc 45 4 SnapSAN 3000 S5000 Snapshot User Guide EF Snapshot Condor _D8 001 Base volume 0028h 08Sw001 Sv0030 D8Swr001 _SV003E OBSwr001_SVOO3F LV Number LV OS Type LV Logical Disk Name Partition Name gt LV oh WN DBSvr00I LV0041 DBServer lt Figure 5 5 Snapshot Management G Configuration Display Area Gi Information List Display Area Configuration Display Area The configuration display area displays the snapshot configuration information in the mom format of a tree view consisting of three layers disk array layer component layer and individual component layer RR StorageS4900 002 Figure 5 6 Configuration Display Area In the con
47. a disk failure In this case restart the backup server as the file system may be invalid Check and measures You can check SRA capacity from the main window of the SnapSAN Manager client When the SRA capacity is insufficient take one of the following measures to obtain enough capacity e SRA expansion Obtain differential management area of the snapshot by expanding the SRA capacity Expand SRA capacity on the configuration setting screen of the SnapSAN Manager client e Deleting an unnecessary snapshot Release the differential management area of the occupied snapshot by deleting an unnecessary snapshot Since a snapshot of the oldest generation occupies a great amount of space generally you can have great effect if you delete the oldest one You can delete a snapshot on the Snapshot screen of the SnapSAN Manager client SRA Fault Effect when an SRA fault occurs When SRA becomes unavailable due to a fault none of the snapshots that share the SRA can be accessed Check and Measures It may be caused by a physical fault of SDV constituting SRA or a physical fault of the pool where SRA is stored On the main window of the SnapSAN Manager client you can check whether a fault occurs After a fault recovery create SRA and the snapshot again 10400422 002 02 2013 2013 Overland Storage Inc 44 16 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault BV fault Effect when a BV fault occurs When a physic
48. a link volume Retry after BV Connecting unlinking the link volume SV Deleting by other pair The snapshot of the snapshot volume of some other pair is being deleted Retry after deletion is completed SV Connecting by other The snapshot volume of some other pair is connected to a pair link volume Retry after unlinking the link volume Monitoring Suspended Retry after restarting the monitoring of the disk array Freezing Retry after defreezing the replication function Replication Operating This operation cannot be executed during the replication operation Restore fault This operation cannot be executed because a restore fault occurred in the target base volume SV fault SV Preparing This operation cannot be executed because a snapshot fault occurred in the target base volume Execute the operation for a snapshot volume whose snapshot state is active SV Prepare Fault Execute the operation for a snapshot volume whose snapshot state is active 10400422 002 02 2013 BV Data Being Migrated 2013 Overland Storage Inc Retry after data migration is completed lt 4 5 84 SnapSAN 3000 S5000 Snapshot User Guide Summary Details Restore Conditions Select Keep or Delete of the new generation that becomes a derived generation by restoration If the new generation is guarded you cannot select delete and execute restoration Clicking the Execute button displays one of the foll
49. a pool Select a pool of which snapshot reserve area is to be expanded from the list Pools that meet any of the following conditions cannot be selected locked The configuration setting operation guard is set to the snapshot data volume lack capacity A pool of which capacity is insufficient Specify the capacity of the snapshot reserve area Specify the snapshot reserve area capacity after expansion Next button Proceeds to the Confirmation screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends About expanding the snapshot reserve area Snapshot data volumes are treated as logical disks in the disk array Therefore no more snapshot data volumes than the maximum number of logical disks supported by the disk array or the maximum number of logical disks in a pool can be bound The maximum number of logical disks to bind is as follows Disk array 1024 up to 1024 per node Pool 1024 If the configuration change of one of snapshot data volumes SDV configuring a snapshot reserve area is locked the area cannot be expanded 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 57 SnapSAN 3000 S5000 Snapshot User Guide Confirmation d Capacity Expansion Snapshot reserve area 700 number osoin 7002 mame Peoi0001 40 008 20 737 410 240 Bytes Capacity atter expansion 20 0 21 474 026 400 Byter Threshold
50. applications application server Terminate or halt the operations and applications that are accessing the volume where a fault has occurred If a shared folder is used on the target volume cancel the sharing temporarily Example Halting service NET STOP service name When halting a service ESMCommonService specify as follows NET STOP ESMCommonService Example Canceling sharing of folder NET SHARE share_name delete When canceling the sharing of the folder bv_folder1 specify as follows NET SHARE bv_folder1 delete 2013 Overland Storage Inc 44 7 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault 2 Flushing BV file system application server Flush the BV file system to discard data in the buffer of the file system iSMrc_flush drv G 3 Unmounting BV application server Unmount BV before executing Restore To unmount BV be sure to terminate all applications that access the drive iSMrc_umount drv G If normal unmounting fails execute unmounting again by specifying the force option iSMrc_umount drv G force Be sure to unmount BV before restoration If restoration is executed without recovering from the unsuccessful unmounting the volume may become invalid 4 Executing Restore application server Execute Restore on the BV volume The following is an example for restoring BV from the snapshot of the latest generation iSMsc_restore bv bv001 bvflg ld sv 1 svflg relgen now
51. be registered in the volume list Therefore to link with the SnapSAN Manager for operation you do not need to create the volume list To conduct a joint operation with the SnapSAN Manager install the SnapControl on the management server on which the SnapSAN Manager has been installed and is operating When you conduct SnapControl environment setting select MANAGER issuing an I O to a disk array via the SnapSAN Manager for the setting of I O issuing path to the disk array Operations linked with the SnapSAN Manager have the following advantages e You can use commands for managing and maintaining the operations of the snapshot function and operating environment binding e You do not need to connect the logical disk to be operated to a server You can operate all the logical disks in the disk array to be monitored by the SnapSAN Manager e Since operation is performed through the SnapSAN Manager connection to the disk array and issuing an I O to the disk array can be performed through LAN Management Server Client Storage Manager Server Storage Manager Client Figure 6 4 Operation Linked with SnapSAN Manager For operations linked with the SnapSAN Manager 10400422 002 02 2013 2013 Overland Storage Inc 46 7 SnapSAN S3000 S5000 Compliance WORM User Guide In the operations linked with the SnapSAN Manager snapshot is operated in the asynchronous state with operations To perform snapshot op
52. be selected If there is any unexecutable volume refer to the Unexecutable Information and take one of the following actions Unexecutable Information Action LV Unconnecting The link volume is already unlinked Monitoring Suspended Retry after restarting the monitoring of the disk array Freezing Retry after defreezing the replication function Summary Clicking the Execute button displays the following confirmation dialog 10400422 002 02 2013 2013 Overland Storage Inc 45 94 SnapSAN 3000 S5000 Snapshot User Guide 08640 will you execute Has link volume been un mounted from the host Figure 5 98 Execution Confirmation Execution Conditions To execute the unlinking operation the following conditions must be satisfied The target link volume is connected e The disk array is being monitored e The disk array is not in the freeze state e When the target destination volume is a base volume and the base volume is also used as MV the synchronization state of the pair is not Separate Preparing Sync Preparing or Restore Preparing The link volume needs to be unmounted from the host Changing Access Mode Change the access mode of a link volume Display the Access Mode Change screen using one of the following procedures e Select a link volume from the information list display area Then from the menu bar of the snapshot management screen select Operation Link volume Operation
53. click Execute button Te is possible that multiple volumes are chosen and executed Iewe ciose wp Figure 5 18 Creation The information screen of the execution dialog displays the information about the items described below The information of each individual item is updated only when the Execute button is clicked Execution Result Displays the execution result of the operation The operation cannot be performed for a volume for which Unexecutable is displayed Unexecutable Information Displays the reason why the operation cannot be executed Status Displays the state of the snapshot SV Number Displays the logical disk number of the snapshot volume in hexadecimal SV OS Type Indicates the OS type of the snapshot volume SV Logical Disk Name Displays the logical disk name of the snapshot volume BV Number Displays the logical disk number of the base volume in hexadecimal BV OS Type Indicates the OS type of the base volume BV Logical Disk Name Displays the logical disk name of the base volume Creation Time Displays the creation time of the snapshot Generation Number Displays the generation number of the snapshot Generation Attribute Displays the generation attribute of the snapshot 10400422 002 02 2013 2013 Overland Storage Inc lt 5 31 SnapSAN 3000 S5000 Snapshot User Guide Guard Displays the snapshot guard status Execution dialog for link volume operations The execution d
54. constituting a volume or disk group on the side where the logical disk name is specified to the BV SV In this case restore is performed in the specified order When a volume group is specified the target volume group is active When a disk group is specified the target disk group is active The SnapSAN Manager only special file is not being created HP UX system and Linux system only Snapshot State Waiting Command The iSMsc_wait command is used for waiting for the specified snapshot state By executing iSMsc_wait command the system waits for the transition of snapshot state Main Options The following option can be specified for the iSMsc_wait command Specification of the target SV 10400422 002 02 2013 Specify the volumes of the BV and the SV e Specification of the BV bv volume bvflg bv_flg Specify the volume and volume type of the BV e Specification of the SV sv volume svflg sv_flg Specify the volume and volume type of the SV 2013 Overland Storage Inc lt 6 47 SnapSAN S3000 S5000 Compliance WORM User Guide Condition for ending the waiting cond Specify the condition for ending the waiting e Snapshot active cond active The system waits for the snapshot active state snap active Monitoring Interval of Snapshot Status interval second Specify the interval for monitoring the snapshot status in seconds The value the number of seconds specified in second indicates the monito
55. created in an instant however it may take some time to delete data depending on the amount of differentials To suspend operation to create a snapshot the snapshot needs to be deleted in advance A snapshot can be created by command operation from a server on which SnapControl is installed or by GUI operation with iSM Application Server Figure 3 10 Creating a Snapshot 10400422 002 02 2013 2013 Overland Storage Inc 43 11 SnapSAN 3000 S5000 Snapshot User Guide To create a snapshot the following conditions need to be satisfied The relationship between BV and SV to be operated is established The activity state is not SV preparing or SV prepare fault The activity state of BV or SV to be operated is not being deleted restored or prepared for restoration The activity state of other SVs set in the specified BV is not being restored or prepared for restoration Guard is not set to the SV to be operated A link is not set between the SV and LV to be operated If pair setting is made to the BV to be operated as replication MV the replication state is not Restoring Replicate Preparing Restore Preparing or Separate Preparing If pair setting is made to BV to be operated as replication RV the replication state is in the Separate state The disk array is not in the freeze state Restoring a Snapshot This function restores the snapshot image created in SV to BV When BV retains a snapshot image in multiple SVs
56. e Specification of the SV sv volume svflg sv_flg Specify the volume and volume type of the SV When only the BV is specified Displays the information of the BV and all SV generations When both BV and SV are specified Displays the information of the BV and the target SV When only the SV is specified Displays the same information that is presented when the BV and SV are both specified 10400422 002 02 2013 2013 Overland Storage Inc lt 6 50 SnapSAN S3000 S5000 Compliance WORM User Guide Specification of the output format Specify the output format of the command Summary Displays a summary of snapshot information Detail Displays detailed snapshot information Displayed Information The iSMsc_query command displays the following information On the Windows system Summary information when the summary option is specified BV Information LD Name bv_ld_name Type bv_type Volume Name volume_name Path path State bv_state SV Information Type LdName1 n snap state YYYY MM DD hh mm ss link_sts Type LdName2_ n snap state YYYY MM DD hh mm ss link_sts Type LdName3 n snap state YYYY MM DD hh mm ss link_sts Description bv_ld_name BV logical disk name bv_type BV OS Type volume name Mount point volume name path Drive letter or path name mounted to the folder of the NTFS volume accessed by users bv_state BV state Type SV OS Type LdName SV logical disk name n Snapshot generation num
57. e When a disk group is specified the target disk group is active e The SnapSAN Manager only special file is not being created HP UX system and Linux system only Restore Command The iSMsc_restore command is used for restoring a snapshot The iSMsc_restore command restores snapshot data from SV to BV There are two operation modes for restoration e Derived SV auto delete mode If there are multiple snapshots and restoration is executed from a midpoint of generations the snapshot data of which generation is later than the restored generation is deleted automatically e Derived SV keep mode If restoration is executed from a midpoint of generations snapshots including those of which generation is later than the restored generation are kept On the Windows system unmount the BV and flush the buffer of the file system before starting to restore snapshot data After starting the restoration operation mount the BV again On the UNIX system if the BV file system is mounted the command terminates abnormally without starting the restoration operation It is therefore necessary to unmount the BV file system in advance Main Options For the iSMsc_restore command you can specify the following options 10400422 002 02 2013 2013 Overland Storage Inc 46 44 SnapSAN S3000 S5000 Compliance WORM User Guide Specification of the Target SV Specify the volumes of the BV and the SV to be created e Specification of the BV bv vo
58. execute the link setting operation the following conditions must be satisfied The target link volume is not connected A volume snapshot volume or base volume selected as a destination volume is not connected The volume selected as a destination volume is active if it is a snapshot volume However the base volume state of the snapshot volume is not the restore fault The volume selected as a destination volume is not in the restoring state if it is a base volume The target link volume and the volume selected as a destination volume are in the same format The disk array is being monitored The disk array is not in the freeze state When the target destination volume is a base volume and the base volume is also used as RV the activity state of the pair is Separate however not Separating sep exec When the target destination volume is a base volume and the base volume is also used as MV the synchronous state of the pair is not Separate Preparing Sync Preparing or Restore Preparing When the target destination volume is a base volume the update prevention state of the target base volume is not Prevent When the target destination volume is a base volume the state of the base volume is not restore fault When the target destination volume is a base volume the state of the base volume is not snapshot fault Data of the volume selected as a destination volume is not being migrated by the Data Migration function if
59. fault may have occurred in the volume for which authority is not granted to a partition user In such a case it is necessary to ask a user to whom authority for the faulty volume is granted to check its status because the partition user cannot check the status of volumes BV SV LV and SDV SRA including unallocated volumes allocated to the partition for which authority is not granted to the partition user Storage group user or partition user with the authority When the BV and LV SV are allocated to the same partition 10400422 002 02 2013 2013 Overland Storage Inc 43 23 SnapSAN 3000 S5000 Snapshot User Guide pe x E E Pool000 ef e ee ee Ly Partition A Figure 3 21 Allocating to the Same Partition All operations are allowed for a partition user user role of operator and above of Partition A When the BV and LV SV are allocated to different partitions i 1 a en I I I 1 wen Partition A Partition B Figure 3 22 Allocating to the Different Partition Relationship Between Snapshot Operations and a Partition User Partition Authority for partition Snapshot creation Link operation of Snapshot Link operation of user cyclic snapshot volume guard base volume and 8 creation deletion and link operation link operator Partition A Partition B restoration volume access volume access and mode change of mode change of above link volume base volume User 1 With With 7 4 P 5 a
60. following is not required Example Sharing of a folder NET SHARE share_name drive_letter path To enable the sharing of the folder bv_folder1 specify as shown below NET SHARE bv_folder1 G bv_folder1 9 Setting a link between LV and SV backup server Link LV to SV to access a snapshot Setting a link enables access to SV depending on the access restriction specified at link setting iSMsc_link lv 1v001 lvflg ld sv bv001 1 svflg ld relgen 10 Mounting LV backup server Mount LV SV to associate LV SV and the file system When a drive letter and an NTFS folder name are specified together in the mount command the drive letter or NTFS folder name is reset automatically after LV is mounted iSMrc_mount mvol Volume 37d84cca 2507 11d5 a0f7 00004c714491 drv H 11 Executing backup backup server Back up the snapshot created in the SV from the LV to the tape or other device using the backup software 12 Flushing LV file system backup server Terminate or halt the operation or application accessing the target volume After backup is completed flush the LV SV file system and write the unwritten data in the buffer of the file system to a disk isMre flush mvol Volume 37d84cca 2507 11d5 a0 7 00004c714491 13 Unmounting LV backup server Unmount LV SV and cancel the volume and file system associations When the LV SV is unmounted the mount point drive letter or NTFS folder name set for th
61. image created in SV Deleting an unwanted snapshot image enables you to use storage capacity effectively Guarding a Snapshot This function is used for guarding a snapshot image created in SV Setting a guard classification to a specific snapshot enables you to guard the necessary snapshot data Figure 3 2 Snapshot Function and Operation 10400422 002 02 2013 2013 Overland Storage Inc 43 2 SnapSAN 3000 S5000 Snapshot User Guide Function and Operation of a Link Volume The link volume function implements transparent access to BV or SV To access SV the access needs to be made via LV that a server can access Snapshot provides the following functions related to link volume operations Binding LV and creating a link control list This function is used for binding LV and defining a list of BVs or SVs link control list LCL accessed via LV Immediately after creating LV you cannot access BV or SV because there is no entity A backup server or other servers to which LV is connected need CV to set a link or unlink 1 Setting a link This function is used for connecting LV with an appropriate volume out of LCL defined in LV Setting a link between LV and the connection volume enables you to access BV or SV via LV Unlinking This function is used for unlinking LV with the linked BV or SV Figure 3 3 Link Volume Function and Operation SV States and State Transition Relationship Between Each Snapshot Operation and SV S
62. in mm 2013 Overland Storage Inc lt q 6 68 SnapSAN S3000 S5000 Compliance WORM User Guide 10400422 002 02 2013 On the UNIX system Displayed Information Q When the attr option is specified D Specis file specis _file_nsme LD NAME VAA Type ki_nasme vss type Attribute attribute LV Link Status link_status To change the output format as shown below set ON to the environment variable RPL_SENSE_VERTICAL_INDICATE For details on environment variables refer to the ControlC ommand Command Reference Specis file LD NANE VAA Type Attribute LV Link Status special_fie_name id_name vas type attribute fink_status When the protect option is specified Special file LD NANE VAA Type specis _file_name id_name vas type Protection Informston Protection Stste Begin Dste Retention Dste Retention Mode Reinitisice protection_stat begn_dst retention_dst retention_mode reinitiaiize_state Special file name Displayed as a 32 byte item on HP UX and Linux as well as 64 byte item on Solaris Logical disk name VAA Volume Absolute AVolume Cloningess OS Type Logical disk attribute Link status of the link volume Displayed only when the attr option is specified If the target volume is other than the link volume a hyphen is displayed 2013 Overland Storage Inc 46 69 SnapSAN S3000 S5000 Compliance WORM User Guide protection_state in_date reten
63. is a BV replication is not in the Replicate Preparing Restore Preparing or Separate Preparing state e When the specified destination volume is paired as the RV for replication the replication state is in the Separated state e When the specified volume is BV it is not in the update prevention state e Data of the target BV is not being migrated that is the target BV is neither a source nor destination volume for the data migration e The disk array storing the target volume is not in the freeze state The following notes do not apply to joint operation with iSM e The target LV is a disk array controlled by the local host e The volume list is not being created e TheiSM only special file must not be being created HP UX system and Linux system only Unlinking Command The iSMsc_unlink command is used for unlinking Once unlinked the BV or SV can no longer be accessed via the LV Main Options For the iSMsc_unlink command you can specify the following options Specification of the target volume Specify the volume of the BV or SV linked with the LV e Specification of the LV lv volume lvflg lv_flg Specify the volume and volume type of the LV e Specification of the BV bv volume bvflg bv_flg Specify the volume and volume type of the BV linked with the LV e Specification of the SV sv volume svflg sv_flg Specify the volume and volume type of the SV linked with the LV If only the LV is specified the
64. link is established the name of the destination volume is displayed access_mode2 Access restrictions On the UNIX system Specified Volume Information aa LD Name ld_name Type type Special File special_file_name State link_sts ld_name Mode access_mode 10400422 002 02 2013 2013 Overland Storage Inc lt 6 61 SnapSAN S3000 S5000 Compliance WORM User Guide Destination Volume Information bb ld_name2 type2 link_sts idd_name 2 access_mode2 Description Specified Volume Information Indicates that the displayed information is that of the specified volume If LV is specified the command displays the information of the LV If BV SV is specified it displays the information of the BV and SV aa Type of the specified volume LV BV SV ld_name Logical disk name type 0S Type special_file_name Special file name link_sts id_name Link status If the link is established the name of the destination volume is displayed access_mode Access restrictions Destination Volume Information Indicates that the displayed information is that of a volume that can be linked with the specified volume If LV is specified the command displays the information of the BV or SV If BV SV is specified it displays the information of the LV This information is displayed only when the lcl option is specified bb Displays the volume type LV BV SV ld_name 2 Logical disk name type2 OS Type link_sts id_name 2 Link status If
65. linking the data replication function and the snapshot function Check if the OS volume manager and file system support the large capacity volumes exceeding 2 TB For example in Windows you can use the large capacity volumes exceeding 2 TB in the following procedure Windows initializes the large capacity volumes exceeding 2 TB as the basic disk of GPT partition format For this reason when binding a logical disk specify WG indicating the GPT format of Windows In the option configuration file on the business server make a specification that enables the use of the GPT disk For the option configuration file refer to the ControlCommand Commands Reference For the GPT format partition disk respective BVs and LVs must be used on different servers If several LVs are bound for a BV respective LVs must be used on different servers The above contents are applied when a BV or SDV is operated in a virtual capacity logical disk 10400422 002 02 2013 2013 Overland Storage Inc lt 4 3 22 SnapSAN 3000 S5000 Snapshot User Guide Restrictions by the Partitioning Function The partitioning function divides the resources of the disk array disks cache memories and ports into logical units like operations to create and manage virtual storages that have independent resources VSPAR Virtual Storage Partition In the partitioning function this virtual storage is called a partition A user who operates and manages a specific
66. list the following conditions must be satisfied e The LV linked to the target BV is registered in the volume list e Ifthe target BV is paired as the RV for replication the MV paired with the RV is registered in the volume list e The volume list is not being created 10400422 002 02 2013 2013 Overland Storage Inc lt 6 57 SnapSAN S3000 S5000 Compliance WORM User Guide e When specifying the combination of a volume group or a disk group with a logical disk name specify the same number of logical volumes as those constituting a volume or disk group on the side where the logical disk name is specified to the SV In this case the guard classification of the logical disk volumes is set or canceled in the order they are specified e When a volume group is specified the target volume group is active e When a disk group is specified the target disk group is active e TheiSM only special file is not being created HP UX system and Linux system only Link Operation The link operation command provides the functions to perform the operation for accessing the BV or SV via the LV and to obtain and display various types of information Link Setting Command The iSMsc_link command is used for setting a link Setting a link enables access to the BV or SV via the LV The target volume must be registered in advance in the link control list LCL Main Options For the iSMsc_link command you can specify the following options Specifi
67. nor destination volume for the data migration e The disk array storing the target volume is not in the freeze state e The target volume is not a dynamic disk volume Windows system e The target BV is registered in the volume list e Ifthe target BV is not registered in the volume list the following conditions must be satisfied e The volume list is not being created e When specifying the combination of a volume group or a disk group with a logical disk name specify the same number of logical volumes as those constituting a volume group or disk group on the side where the logical disk name is specified to the SV In this case snapshot creation is performed in the specified order e When a volume group is specified the target volume group is active e When a disk group is specified the target disk group is active The SnapSAN Manager only special file is not being created HP UX system and Linux system only The following notes do not apply to joint operation with SnapSAN Manager e The LV linked to the target BV is registered in the volume list e Ifthe target BV is paired as the RV for replication the MV paired with the RV is registered in the volume list Snapshot Data Deletion Command The iSMsc_delete command is used for snapshot data deletion The iSMsc_delete command deletes the snapshot data created in an SV Main Options For the iSMsc_delete command you can specify the following options Specificatio
68. number of the link volume in hexadecimal LV OS Type Displays the OS type of the link volume LV Logical Disk Name Displays the logical disk name of the link volume Link Permission Volume List Displays a list of volumes that can be linked to the link volume Displaying Snapshot Information The snapshot related information can be checked using the following functions e Snapshot management screen of the SnapSAN Manager client e Main window of the SnapSAN Manager client e Configuration display command GSMview This section describes how to operate these functions and the information they display Snapshot Management Screen The snapshot management screen of the SnapSAN Manager client displays the following information that is necessary for snapshot operations e Snapshot information Displays the information about the paring relationship between base volume and snapshot volume as well as the snapshot status creation time and generation number e Link information Displays the information about the link volume connection and access mode 10400422 002 02 2013 2013 Overland Storage Inc 45 111 SnapSAN 3000 S5000 Snapshot User Guide Displaying Snapshot Information ISM Client Web GUI iSM Client Win GUI Ev hames B05 Type EV topea Och tee Stans Lurk W Deza Kom w ah Figure 5 113 Snapshot Management SnapSAN Manager Main Window The SnapSAN Manager main window displays the followin
69. number of the link volume in hexadecimal LV OS Type Indicates the OS type of the link volume LV Logical Disk Name Displays the logical disk name of the link volume Partition Name Displays the name of partition to which the link volume belongs This column is not displayed for disk arrays for which VirtualStoragePartitioning has not been purchased DV Number Displays the logical disk number of the destination volume DV in hexadecimal This item is shown when there is a volume link DV OS Type Indicates the OS type of the destination volume DV This item is shown when there is a volume link DV Logical Disk Name Displays the logical disk name of the destination volume DV This item is shown when there is a volume link 10400422 002 02 2013 2013 Overland Storage Inc 45 14 SnapSAN 3000 S5000 Snapshot User Guide LV Mode Displays the access restriction of the link volume This item is shown when there is a volume link Display Description Indicates the volume can be read and written from the operating R W Permit host Read Only Indicates the volume can only be read from the operating host Not Ready Indicates the volume cannot be operated from the operating host Not Available Indicates the volume cannot be operated from any host Capacity GB Displays the virtual capacity of the link volume The displayed value is equal to the capacity of the link permit volume Pool List Poci Number
70. obtained disk array configuration information includes the snapshot configuration information 10400422 002 02 2013 2013 Overland Storage Inc 45 118 SnapSAN 3000 S5000 Snapshot User Guide Displaying Snapshot Information Configuration Display Command iSMview The all option is used when obtaining configuration information using the configuration display command iSMview The configuration information obtained using this option can be output to a text format file The description example shown below outputs all disk array configuration information obtained using the all option to a text format file gt iSMview all Storage001 gt gt configinfo txt Configuration Information File Output Command iSMcsv The configuration information file output command iSMcsv outputs all obtained disk array configuration information to a CSV format file as in the example shown below gt iSMcsv arrayname Storage001 out D tmp 10400422 002 02 2013 2013 Overland Storage Inc 45 119 overland storage Chapter 6 SnapControl This chapter describes how to operate snapshot with SnapControl SnapControl provides commands that perform various snapshot operations so that it can interwork with snapshot in backup and other tasks pplication Server Backup Server Figure 6 1 Operating Snapshot with SnapControl No Command Name Operation Description Target System Windows UNIX iSMvollist Volume List Associates logical di
71. on the Windows system For volumes to which no mount point drive letter or NTFS folder name has been set specify a volume to be mounted and the mount point to be set to the volume to associate the volume with the mount point before performing mount operation At this time for a volume that was set in the Not Ready state when unmounted with the iSMrc_umount command release the Not Ready state Main Options For the iSMrc_mount command the target volume is specified by its drive letter mount point volume name or NTFS folder name When you mount a volume to which no mount point drive letter or NTFS folder name has been set specify the mount point volume name to be mounted and the mount point to be set to the volume at the same time In this case the specified mount point is set to the target volume and then mount the volume 10400422 002 02 2013 2013 Overland Storage Inc 46 72 SnapSAN S3000 S5000 Compliance WORM User Guide Displayed Information The iSMrc_mount command displays messages when Mount starts and ends Start message Mount Start YYYY MM DD hh mm ss disk_number ld_nametype volume_name path iSMrc_mount Info iSM13220 Setting drive letter drive has succeeded End message Mount Normal End YYYY MM DD hh mm ss disk_number ld_nametype volume_name path Description YYYY MM DD hh mm ss Start End time Year Month Day Hour Minute Second disk_number Physical disk number ld_name Logic
72. operation with iSM e The target volume or a volume paired with the target volume is registered in the volume list in advance In remote operation of a pair the target volumes must satisfy the following conditions e The target volumes are paired and the volumes in the upper or lower pair have been registered in the volume list e When the target volumes are paired and MV or RV is also used as a base volume BV of the snapshot function BV or LV linked to BV has been registered in the volume list e When the target volume is a base volume BV snapshot volume SV or link volume LV BV or LV linked to BV or SV has been registered in the volume list The volume list is not being created or updated e When a volume group is specified the target volume group is active e When a disk group is specified the target disk group is active e TheiSM only special file is not being created HP UX system and Linux system only 10400422 002 02 2013 2013 Overland Storage Inc lt 4 6 70 SnapSAN S3000 S5000 Compliance WORM User Guide Notes When the attr option is specified the control volume to be displayed as a logical disk attribute is displayed only when the control volume has been bound in the disk array that can identify the control volume attribute For a logical disk defined as a control volume on the server the attribute is not displayed Disk Operations The disk operation function which functions
73. or snapshot fault occurred the icon changes to Represents a collection of snapshot volumes If the snapshot is released the icon changes to B 6 snapshot fault or SV prepare fault occurred the icon changes to ig Represents a collection of link volumes pF Represents a collection of pools If a threshold excess occurred in pool the icon changes to B Individual Component Layer This layer displays the base volume list and the pool list to which snapshot volumes belong Based on the environment setting for state monitoring either a logical disk number or logical disk name is displayed as an identifier for each logical disk 10400422 002 02 2013 2013 Overland Storage Inc 45 6 SnapSAN 3000 S5000 Snapshot User Guide Icon Description Represents a base volume a If a restore fault or snapshot fault occurred the icon changes to Q D Represents a pool If a threshold excess occurred in pool the icon changes to B Information List Display Area This area displays lists of detailed information about the components one level below the layer selected in the configuration display area Clicking an item name sorts the list The order of items can be changed through the drag and drop operation The icon of a disk array not being monitored is shaded in gray Item Selected in the Item Displayed in the Information List Display Area Configuration Display Area SnapSAN Manager server Disk array list
74. partition is called the partition user The operation authority for the specific partition is given to the partition user by the storage group user user who operates and manages the entire disk array For partition users there are user roles similar to those for storage group users According to the levels the following operations can be performed to the partition for which the operation authority is given User Authority monitor Allows only reference operator Allows necessary operations for using replication and snapshot administrator Allows all operations The following operation restrictions are imposed on the SnapSAN Manager snapshot management screen when the partitioning function is supported e Storage group user A storage user can refer to all the information related to snapshot In addition all operations are allowed for a storage user with the user role of operator and above e If RV is set as BV only the Background Copy mode can be used for replication to the RV e IfRVis set as BV only Restore protect can be used for restoration from the RV to MV e Partition user A partition user can refer to the information of the base volume or link volume allocated to the partition for which authority is granted to the partition user To operate the volumes the partition user must also have the role of operator and above in addition to the authority for the partition When a snapshot operation terminated abnormally a
75. pool where a snapshot reserve area exists A pool in the rotation stop state by the eco mode A new snapshot reserve area SRA cannot be bound in the following disk arrays nodes A pool which includes 1024 logical disks About binding the snapshot reserve area Snapshot data volumes are treated as logical disks in the disk array Therefore no more snapshot data volumes than the maximum number of logical disks supported by the disk array or the maximum numbers of logical disks in a pool cannot be bound When the snapshot reserve area is bound the management area is added to the specified capacity For details on the management area refer to Appendix A The value of the snapshot reserve area capacity is a certain percentage of the target base volume multiplied by the number of generations Example When assuming 30 Base volume capacity 10 GB Number of snapshot generations 4 SRA capacity10 GB 30 4 generations 12 GB The snapshot reserve area can be expanded after binding free pool space is required Confirmation 10400422 002 02 2013 2013 Overland Storage Inc 45 36 SnapSAN 3000 S5000 Snapshot User Guide Figure 5 22 Settings to Bind Confirmation This screen is to confirm the settings to bind a snapshot reserve area Check whether the displayed settings to bind a snapshot reserve area are correct Advanced button Opens the advanced settings screen Set button Displays the f
76. restored 10400422 002 02 2013 2013 Overland Storage Inc 45 24 SnapSAN 3000 S5000 Snapshot User Guide Normal Indicates a normal generation Derived Indicates a generation with the derived attribute by restoration Used Capacity GB Displays the amount of snapshot capacity used This item is shown when the snapshot is active or being restored Restore Different Value GB Displays the amount of difference caused before restoration is completed This item is shown when the status is restoring LV Number Displays the logical disk number of the link volume in hexadecimal This item is shown when there is a volume link LV OS Type Indicates the OS type of the link volume This item is shown when there is a volume link LV Logical Disk Name Displays the logical disk name of the link volume This item is shown when there is a volume link LV Mode Displays the access restriction of the link volume This item is shown when there is a volume link Display Description R W Permit Indicates the volume can be read and written from the operating host Read Only Indicates the volume can only be read from the operating host Not Ready Indicates the volume cannot be operated from the operating host Not Available Indicates the volume cannot be operated from any host Base volume unit list link volume The link volume display area of the base volume unit list displays the information about the items describ
77. server Also the information displayed on the screen is cleared Executing the refresh function with a disk array or any item beneath it selected in the configuration display area updates all the information about the selected disk array and leads to the state with the disk array selected In either case if you cancel the refresh operation before it is completed execute the refresh function again Perform one of the following procedures e From the menu bar select View Refresh e Press the F5 key Recording Screen Information The information displayed on the snapshot management screen is automatically recorded when the screen is closed The recorded information is added next time the snapshot management screen is activated Information To Be Recorded e Item width e Item position e Screen size e Screen position e Information acquisition interval e Snapshot volume view order e Status bar view state e Connection screen size e Connection screen position Displaying Disk Array Properties Display the setting state of the device Perform one of the following procedures e Select a disk array from the information list display area or configuration display area Then from the menu bar select View Properties e Select the information list display area or configuration display area right click on the mouse and then select Properties 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 109 SnapSAN 3000 S
78. short snapshot images cannot be retained Therefore snapshot provides the function to set the threshold for snapshot used capacity and warn you when the used capacity of the snapshot reserve area exceeds the threshold You can specify the threshold of the snapshot reserve area when you create the snapshot reserve area and expand capacity You can also change only the threshold by the configuration setting function of the SnapSAN Manager client When the snapshot reserve area is running short snapshot images cannot be retained and backup data ensured in SV will be lost Therefore you need to secure snapshot reserve area with enough spaces When the snapshot reserve area is running short during restoration snapshot images are retained until the completion of restoration After the completion of restoration however data of all generations ensured on SV will be lost Events that may cause the shortage of the snapshot reserve area are as follows e Restoration in the derived generation keep mode is executed e Data is written to BV during restoration 10400422 002 02 2013 2013 Overland Storage Inc 43 10 SnapSAN 3000 S5000 Snapshot User Guide When restoration is executed in the derived generation keep mode the snapshot reserve area is used to keep updated differential data by restoration Similarly when data is written to BV during restoration the snapshot reserve area is used to keep the differential data Therefore you need to
79. spacial file name Special file name Displayed as a 32 byte item on HP UX and Linux as well as 64 byte item on Solaris disk_arsy_nmame Disk amay name path Whether to use a special file Usually this field is blank and nothing appears in this field however when data replication or snapshot is perfommed ifan emor is detectad im access to the special file B appears 2013 Overland Storage Inc lt 6 20 SnapSAN 3000 S5000 Compliance WORM User Guide Gv 10400422 002 02 2013 About the state of Path whether to use a spacial file Establishing multiple connections tothe same logical disk enables a path special file to have redundant configuration In this case for each command of data replication or snapshot when an error is detected in access to the path spacial file used for issuing an I O access is switched automatically to smother path special file registered in the volume list and I O continuation to a disk armay is tried When an emor is detected in access to a path spacial file B is displayed in the Path information of the special file used at the time which indicates an error occurs in the special file If an emor occurs when you try to access a path special file in the environment where the HP UX multipath mechanism is enabled this mechanism automatically switches access to another path spacial file Therefore it is only when emors ere detected in all the paths special files that the volume
80. than BV data are left The SVs are referred to as derived SVs and generation information becomes the derived generation To distinguish the derived SVs an SV has generation attribute information The generation attribute of a derived SV is Derived and that of a normal SV is Normal If you recreate a snapshot using the SV of which generation attribute is once Derived the attribute is returned to Normal Derived SV Generation Number at Restoration There are two operation modes for restoration of the snapshot function 10400422 002 02 2013 2013 Overland Storage Inc 43 5 SnapSAN 3000 S5000 Snapshot User Guide Derived SV Auto Delete Mode When restoration is executed a snapshot of which generation is later than the restored generation is deleted Derived SV Keep Mode Snapshots including those of which generations are later than the restored generations are kept For a disk array with the derived SV keep mode the derived SV keep mode is the default operation mode For a disk array not with the derived SV keep mode the derived SV keep mode cannot be selected When restoration is executed in the derived SV keep mode snapshots later than the restoration source SV become derived SVs At this time 1 is given as the generation number of the restoration source SV and is given to the generation number of the derived SV When a derived SV is selected as a restoration source and restoration is executed in the deriv
81. the derived attribute by restoration Used Capacity GB Displays the amount of snapshot capacity used This item is shown when the snapshot is active or being restored 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 28 SnapSAN 3000 S5000 Snapshot User Guide Capacity GB Displays the virtual capacity of the snapshot volume The displayed value is equal to the capacity of the corresponding base volume View Operation Help CSV Output of Information List gt TSY Output of Information List Close Alt F4 Closes the snapshot management screen Properties G Operation Help Displays or hides the status bar v Status Bar Environment Settings Environment Settings i pe the Volume Connection Status i Displaying Disk rray Properties connor eroan when a disk array is selected Displaying Link Volume Properties Refresh as when a link volume is selected Updating to the Latest Information Snapshot Cyclic Creation Ly Crating a Snapshot Cyclically Link volume Operation Base volume Access Mode Change Changing Base Volume Access Mock Snapshot Creation Crating a Snapshot Snapshot Deletion Deleting a Snapshot Snapshot Restoration Restoring Data from a Snapshot Snapshot Guard Guarding a Snapshot Snapshot Guard Cancel _ gt
82. the following options Option Description d option Lists disk array information Displays information only associated with specified disk arrays sorted by using logical disk number as the key If a specific logical disk number is specified the system displays information only associated with the specified logical disk number dl option Displays information only associated with specified disk arrays sorted by using de option logical disk name as the key If a specific logical disk name is specified the system displays information only associated with the specified logical disk name Displays information only associated with specified disk arrays sorted by using i path information as the key If a specific drive letter or a path name of the NTFS dd option folder is specified the system displays information only associated with the specified drive letter or path name of the NTFS folder Displays information only associated with specified disk arrays sorted by using physical disk number as the key If a specific physical disk number is specified the system displays information only associated with the specified physical disk number dp option 10400422 002 02 2013 2013 Overland Storage Inc lt 4 6 12 SnapSAN S3000 S5000 Compliance WORM User Guide Option Description Displays information only associated with specified disk arrays sorted by using HBT and LUN as the key If
83. the installation guide attached to this software Installation For details on the installation procedure refer to the installation guide attached to this software 10400422 002 02 2013 2013 Overland Storage Inc 42 4 SnapSAN 3000 S5000 Snapshot User Guide System Configuration Setting Operating Environment You can set various types of operations when executing a command by using the environment variables For details on the environment variables refer to the ControlCommand Command Reference Uninstallation For details on the uninstallation procedure refer to the installation guide attached to this software Update To update the SnapControl software uninstall the existing software and then install the new software For the details of the installation and uninstallation procedure refer to the installation guide attached to this software Disk Array Configuration For the disk array to be connected determine the configuration for using the snapshot Product License Unlocking To use the Snapshots you must unlock the product license set in the disk array To unlock the license you must purchase the corresponding products for the capacity category equal to or greater than the total physical capacity of the disk array At starting up the snapshot management and SnapControl check the license status of the products and check whether they are available If the total capacity of the physical disk exceeds t
84. the operation volume setting file Using the operation volume setting file allows the target snapshots to be described in a file so that they can be managed and shared thereby improving system operability and maintainability of snapshot The following example shows a description in the operation volume setting file Example for the Windows system BV and SV are specified Id bv000 Id sv000_01 drv E Id bv001 mdir c mnt q vol Id sv001 Id bv003 relgen 1 Cyclic generation is specified iSMsc_create command only Id bv010 cyclic Deleted SV auto selectionis specified iSMsc_delete command only Id bv011 auto SV batch operation is specified iSMsc_delete or iSMsc_svguard command only Id bv012 all When the number of SV generations for BV is 1 Id bv020 Example for the UNIX system BV and SV are specified Id bv000 Id sv000_01 sfn dev rdsk c16t1d0 Id sv001_01 vg dev vgvol Id sv002_01 sv002_03 Id bv003 relgen 1 Cyclic generation is specified iSMsc_create command only Id bv010 cyclic Deleted SV auto selectionis specified iSMsc_delete command only Id bv011 auto SV batch operation is specified iSMsc_delete or iSMsc_svguard command only Id bv012 all When the number of SV generations for BV is 1 Id bv020 To specify the operation volume setting file use the file option together with the snapshot operation commands 10400422 002 02 2013 2013 Overland Stor
85. the pool in which the snapshot reserved area exists is displayed as the specifiable area Specify the number of additional generation tone logical disk Specify the number of snapshot generations Up to 16 snapshot generations can be added to a logical disk Next button Proceeds to the Confirmation screen 10400422 002 02 2013 2013 Overland Storage Inc 45 49 SnapSAN 3000 S5000 Snapshot User Guide Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends Selection of the volume logical disk to which snapshot generations are added e Once a volume has become the base volume its capacity cannot be expanded e The OS type of the logical disk that has become the base volume cannot be changed its name can be changed About the addition of snapshot generations e Upto 16 snapshot generations can be added per logical disk e Snapshot generations can be added to more than one logical disk up to 64 logical disks simultaneously e Snapshot generations are treated as logical disks snapshot volumes in the disk array It is therefore impossible to bind more snapshot generations than the maximum number of logical disks supported by the disk array or the maximum number of logical disk in a pool e The allowable total capacity of snapshot volumes varies according to the size of the cache memory installed If the maximum value is exceeded an
86. to day and performing online tasks and batch or backup processing in parallel that is performed during the night This guide assumes that you are familiar with computer hardware data storage and network administration terminology and tasks It also assumes you have basic knowledge of Internet SCSI aSCSD Serial attached SCSI SAS Serial ATA SATA Storage Area Network SAN and Redundant Array of Independent Disks RAID technology This guide assumes that you are familiar with computer hardware data storage and network administration terminology and tasks It also assumes you have basic knowledge of Internet SCSI GSCSD Serial attached SCSI SAS Serial ATA SATA Storage Area Network SAN and Redundant Array of Independent Disks RAID technology Product Documentation and Firmware Updates Overland Storage SnapSAN product documentation and additional literature are available online along with the latest release of the SnapSAN Snapshot 3000 S5000 software Point your browser to http docs overlandstorage com snapsan Follow the appropriate link to download the latest software file or document For additional assistance search at http support overlandstorage com Overland Technical Support For help configuring and using your SnapSAN Snapshot 3000 S5000 search for help at http support overlandstorage com kb 10400422 002 02 2013 2013 Overland Storage Inc iii SnapSAN 3000 S5000 Snapshot User Gu
87. to pay attention to the following regarding operation lt For Windows gt 1 If NTFS is used for the file system SV cannot be referenced 2 If FAT16 or FAT82 is used for the file system use the mount command of disk management operation commands or start Disk Management of Windows and link it to the file system 10400422 002 02 2013 2013 Overland Storage Inc 43 8 SnapSAN 3000 S5000 Snapshot User Guide 3 If FAT16 or FAT32 is used for the file system write processing to SV results in an error Therefore do not use any application that writes data to the drive automatically In addition operation that writes data to SV such as changing partition configuration of the disk cannot be performed by Disk Management of Windows lt For UNIX gt When you mount the file system you need to mount it with read only specification Control Volume When you use a snapshot volume SV using a link volume LV by SnapControl another volume always connected to a server is needed for control from a server to a disk array This volume is referred to as a control volume CV A control volume is needed for each server that uses mounts snapshot Backup Server Figure 3 8 Control Volume Managing the Snapshot Reserve Area To use snapshot you need to prepare an area for storing differential data to retain snapshot images The area is referred to as the snapshot reserve area SRA The snapshot reserve area has the fo
88. volume list 2013 Overland Storage Inc lt 4 6 23 SnapSAN S3000 S5000 Compliance WORM User Guide volume_number Total numb of volume information items in the volume list Execution Conditions To perform the command operation on UNIX the following conditions must be satisfied G While the volume list is being created of updated it is not possible to display the volume list or execute ReplicationControl commands and SnapControl commands Gi While the SnapSAN Manager Server is sunning on the same server the volume list only can be displayed but it cannot be created or updated HP UX system and Linux system only iii The iSM only special file is not being created HP UX system and Linux system only iv Create or update the volume list when the OS on the server recognizes the logical disks and volumes For aseplication volume RV of the data replication function the pair must bain the Separated state Fora link volume LV of the snapshot function a link to a snapshot volume SV must be established Use Volume List Display On the Windows system the volume list creation and display function can be used via the GUI The GUI functions include volume list display selective display of disk arrays and creation and update of the volume list The function to define control volumes used for the application server to operate the data replication or snapshot function is also provided Screen Configuration To create o
89. volumes in the volume list Message 11932 is output if there is no iSCSI volume Displays iSCSI information of the specified volume Message 11933 is output if the specified volume is not iSCSI volume arrayname option Displays iSCSI information of all iSCSI volumes for the specified disk array Message 11933 is output if there is no iSCSI volume The tgt option is supported only for Linux 10400422 002 02 2013 2013 Overland Storage Inc 46 19 SnapSAN S3000 S5000 Compliance WORM User Guide 10400422 002 02 2013 Gii Displayed Information When the r option is spacified When the volume list is created or updated successfully the following messaz2 appears iSM1 1700 Plesse wai s minut iSM1 1100 Command hsscompleted successfully When the d option is specified The disk amay information as shown below is listed Disk Array List Disk Array Name Number of LDN disk_srsy_nsame number D intian disk_arsy_neme Disk arsy mame number Number of logical disk information items spacial file for each disk amay registered in the volume list When the l option is specified Information of the correspondence of the logical disks as shown below is listed LDN LD NAME VAA TYPE Specis File Disk Array Path kin ki_nasme vss type specis _file_name disk_srsy_nsme psth D iption ldn Logical disk number 1d_name Logical disk name vaa VAA Volume Absolute AVolume Cloningess type OS type
90. which snapshot are created Only the pool in which the snapshot reserved area exists is displayed as the specifiable area Specify the number of additional generation tone logical disk Specify the number of snapshot generations Up to 16 snapshot generations can be added to a logical disk Next button Proceeds to the Confirmation screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends Selection of the volume logical disk to which snapshot generations are added e Once a volume has become the base volume its capacity cannot be expanded e The OS type of the logical disk that has become the base volume cannot be changed its name can be changed About the addition of snapshot generations e Upto 16 snapshot generations can be added per logical disk e Snapshot generations can be added to more than one logical disk up to 64 logical disks simultaneously 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 41 SnapSAN 3000 S5000 Snapshot User Guide e Snapshot generations are treated as logical disks snapshot volumes in the disk array It is therefore impossible to bind more snapshot generations than the maximum number of logical disks supported by the disk array or the maximum number of logical disk in a pool e The allowable total capacity of snapshot volumes varies according to the size of the cache memo
91. 0 Snapshot User Guide The snapshot cyclic creation operation cannot be executed for the same base volume consecutively To repeat snapshot cyclic creation close the Snapshot Cyclic Creation screen and then re open it to execute the operation If the snapshot creation target volume is in the released state executing the snapshot cyclic creation operation places it in the active state A snapshot is created for the next oldest generation except for the linked SVs when snapshots have been created in all the SVs and the oldest SV has been linked with LV Clicking the Cancel button from the Processing dialog suspends cyclic snapshot creation and redisplays the Snapshot Management screen If snapshot deletion is performed but snapshot creation is not performed the target snapshot state becomes invalid Changing Base Volume Access Mode Change access mode of a base volume to R W Permit Execute only when access mode of a base volume cannot be returned to R W Permit from the host Display the Base volume Access Mode Change screen using one of the following procedures e Select a base volume from the base volume unit list in the information list display area Then from the menu bar of the snapshot management screen select Operation Snapshot Operation Base volume Access Mode Change e Select a base volume from the base volume unit list in the information list display area Then right click on the mouse and select Base volume Access Mod
92. 00 Po01000 00 FC 0001 Pool001 00 FC 0002 Pool002 00 ATA exceeded Snapshot Pool Information Displays a list of information about the snapshot pools bound to the disk array Pool No h Displays the pool number Pool Name Displays the pool name Node No h Displays the node number of the pool PD Type Displays either of the following as the type of the PD configuring the pool FC FC attribute ATA ATA attribute SAS SAS attribute SAS SED SAS SED attribute NLSAS NLSAS attribute Threshold Displays the threshold state Exceeded The used snapshot capacity has exceeded the threshold The used snapshot capacity is below the threshold Node No h is displayed only for the disk arrays with nodes Tf there is no snapshot pool the following error message is displayed iSM11183 Snapshot Pool doesn t exist Displaying the detailed snapshot information about a pool When the spln or splm option is specified the command displays the detailed snapshot information about the specified pool Snapshot Poo Detail Informston Pool No h 0001 Pool Name Pool Type Node No h PD Type Threshold Tots Snapshot Capacity 70 866 950 384 Bytes 10400422 002 02 2013 2013 Overland Storage Inc 45 117 SnapSAN 3000 S5000 Snapshot User Guide Displaying Snapshot Information Snapshot Threshold 52 7GB 80 56 693 568 000Bytes Snapshot Control Capacity 2 0GB 2 148 532 224Bytes SDV List
93. 00422 002 02 2013 2013 Overland Storage Inc lt A 10 overland storage Appendix B Licenses Apache License For terms and conditions for use reproduction and distribution see http www apache org licenses LICENSE 2 0 Flex License For a copy of the license see http arcib dowling edu cgi bin info2html flex info gz Copyright OpenSSL License For a copy of the current LICENSE file inside the CVS repository see http www openssl org 10400422 002 02 2013 2013 Overland Storage Inc lt 4 A 1 overland storage Index B Backup Operation 1 2 BaseProduct 1 6 Base Volume Unit List 5 17 base volume unit list 5 11 5 14 basic disk A 1 Binding a Snapshot Volume 3 11 Binding LV 3 3 Binding SV 3 2 C command type 6 11 cyclic generation 6 8 D date 6 10 dg 6 8 disk group name 6 8 disk scanning 6 2 6 4 drive letter 6 8 drv 6 8 dynamic disk A 1 E error level 6 10 expanded partition A 1 F file system buffer flush 6 2 6 4 G GPT format A 1 10400422 002 02 2013 H host name 6 10 I iSMrc_flush 6 2 6 4 iSMrc_ldlist 6 2 6 4 iSMrc_mount 6 2 6 4 iSMrc_scan 6 2 6 4 iSMrc_sense 6 2 6 4 iSMrc_signature 6 2 6 4 iSMrc_umount 6 2 6 4 iSMsc_create 6 1 6 3 iSMsc_delete 6 2 6 4 iSMsc_link 6 2 6 4 iSMsc_linkinfo 6 2 6 4 iSMsc_query 6 2 6 4 iSMsc_restore 6 1 6 4 iSMsc_svguard 6 2 6 4 iSMsc_unlink 6 2 6 4 iSMsc_wait 6 2 6 4 iSMvollist 6 1 6 3
94. 2 002 02 2013 2013 Overland Storage Inc 43 7 SnapSAN 3000 S5000 Snapshot User Guide System t1 t2 t3 t4 t5 t6 Volume SV 1 1 t1 2 t2 3 t1 4 t1 4 t1 4 t1 SV 2 1 t2 2 t2 3 t1 1 t5 1 t5 SV 3 1 t3 2 t3 3 t3 1 t6 SV 4 1 t4 2 t4 3 t4 Access Restriction Snapshot does not have access restriction for BV It is always possible to execute Read Write RW Since SV is accessed via LV usually the access restriction is set to Not Ready NR If you use SV you need to set a link When you set a link you can select Read Write RW or Read Only RO but usually use Read Write RW If you set Read Only RO operation varies depending on the OS and the file system to be used If you use Read Only RO you must fully understand operations of the OS and the file system You can set a link to SV only while snapshot is established snap active Access Restriction Description State snap acti ve Read Write R W RV is enabled for read write v Read Only RO RV is enabled only for reading A Not Ready NR RV is disabled for read write A Not Available NA RV is not recognized by the operating A system or the LU Logical Unit is invalid v Available A Available with administrative restrictions Unavailable snap active Snapshot active RW Read Write RO Read Only NR Not Ready NA Not Available Noted you set Read Only RO to SV during link setting you need
95. 20 character long logical disk name is set that consists of the disk array specific 16 character string followed by a four digit hexadecimal logical disk number 2013 Overland Storage Inc 45 43 SnapSAN 3000 S5000 Snapshot User Guide Completion Gp Conaretion Mesition snapshot generation addition succeeded Chick a following Link if necessary Peres Map Figure 5 30 Completion The snapshot addition result is displayed When the processing succeeded the following links are displayed e Add another generations Opens the Generation Addition screen to add other snapshot generations e Bind link volume Opens the Link volume Bind screen Finish button Returns to the monitoring screen Binding a Link Volume The work of binding a link volume is done using the Link volume Bind screen in the wizard format as follows Link volume Bind Source volumes to bind link volumes are selected Confirmation Link volumes to bind are displayed Check whether the settings are correct Advanced Click this button to make detailed link volume settings Completion The link volume binding result is displayed 10400422 002 02 2013 2013 Overland Storage Inc 45 44 SnapSAN 3000 S5000 Snapshot User Guide e Only one link volume can be bound for one base volume per operation However by performing this operation multiple times multiple link volumes can be bound for one base volume e There is no particu
96. 200000099 IV SAS 052h 0052h 200000 200000099 IV SAS 053h 0053h 200000 200000099 IV SAS 000h O00eh re_test_ 52900 3 v FC 002h 0010h re_test 52900 3 v FC 005h 0013h re_test_ 2900 3 RY FC Disk Array Subsystem 2900 3 faut 7 Drive Letter Path Volume Name Disk No Volume Definition LUN Lohe OT a a ign 2001 03 jp n WOLUME 14 4 Figure 6 8 Disk Array Volume Information Create Update the Volume List To create and update the volume list select File and then select Create Update Volume List on the Volume List Display screen Select File and then select Create Update Volume List on the Volume List Display screen The following inquiry message is displayed Create Update Yolume List x p 001 A2 The volume ist is used in data replication control or snapshot Separate all paired RV s which are connected Set link For all Lys which are connected Unlink all the linked BYs Specify the drive letter and path name of NTFS folder that are used by data replication control or snapshot Do you want to create update the volume list ECE ce Figure 6 9 Execution Confirmation Update List Clicking the OK button executes Create Update Volume List Clicking the Cancel button cancels Create Update Volume List and returns to the Volume List Display screen The following message appears when the volume list has been created updated successf
97. 22 002 02 2013 2013 Overland Storage Inc lt q 5 64 SnapSAN 3000 S5000 Snapshot User Guide The work of unbinding link volumes is done using the Link volume Unbind screen in the wizard format as follows Link volume Unbind A link volume to be unbound is selected Confirmation Link volumes to unbind are displayed Check whether the settings are correct Completion The link volume unbinding result is displayed Link volume Unbind Link volume Unbind gt Comfirmation gt Completion 1 Select olume Lank volume list 000Sh 2000000991010010 LYOOOS 10 0 Link volume Pool000 BRAIDS Back Next cancer weap Figure 5 57 Link volume Unbind Wizard Select link volumes to unbind from the list Next button Proceeds to the Confirmation screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends 10400422 002 02 2013 2013 Overland Storage Inc 45 65 SnapSAN 3000 S5000 Snapshot User Guide Confirmation Weed for Pool nase 000Sh 2000000991010010 LYVOOOS 10 0 Link volume Poeld00 ra C When the settings are OK click Set to start unbinding the link volume It you want to modify any settings click Back EEr ee es G e G Figure 5 58 Link Volume Unbinding Confirmation This screen is to confirm the settings about link volume unbinding Check whether the displayed link volume
98. 5000 Snapshot User Guide StorageS4900 001 Properties Storage 4300 001 a1 Replication Status Figure 5 111 Properties The items display the following information Disk array name Displays the identity name assigned to the disk array Replication Status Indicates whether the replication function of the disk array is ready to be executed READY Indicates that the replication function is ready to be executed FREEZE Indicates that the replication function is in the freeze state because of the powering off process of the disk array or the reception of the FREEZE instruction Displaying Link Volume Properties Display a link permission volume list for a link volume Perform one of the following procedures e Select a link volume from the information list display area Then from the menu bar select View Properties e Select a link volume from the information list display area right click on the mouse and then select Properties DBSvr001_LV 0041 Properties LV Number LV OS Type UN LV Logical Disk Name DBSvr001_LVv0041 Link Permission Volume List Type Number os Type Logical Disk Name up BV DBSvrO01 DBSvr001_SvO03D DBSvr001_SVO03E DBSvr001_SVO03F DBSvr001_svo040 Figure 5 112 Volume List Properties 10400422 002 02 2013 2013 Overland Storage Inc 45 110 SnapSAN 3000 S5000 Snapshot User Guide Displaying Snapshot Information LV Number Displays the logical disk
99. 5000 Snapshot User Guide Logical Fault and Physical Fault 2 Terminating applications backup server To maintain data consistency terminate or halt operations and applications that are accessing the volume concerned If shared folders are used on the volume concerned cancel sharing temporarily If application or service has not been halted or terminated or accesses to shared folder exist unmounting in Step 4 will fail Example Halting service NET STOP service name When halting a service ESMCommonService specify as follows NET STOP ESMCommonService Example Canceling the share of a shared folder NET SHARE share name delete To cancel the share of shared folder name bv_folder1 specify the following NET SHARE bv_folder1 delete 3 Flushing BV file system application server Flush the BV file system and write the file system buffer data not yet written to the disk iSMrc_flush drv G 4 Unmounting BV application server It is necessary to create a complete static point of BV data This is for writing the metadata of the file system completely to the disk This is also for suppressing I O to the logical volume to keep data consistency of BV and SV To keep data consistency of BV and SV unmount BV after terminating operation and release the link between the volume and file system Before unmounting you must terminate all applications that may access the drive If unmounting BV failed and there
100. Access Mode Change e Select a link volume from the information list display area Then right click on the mouse and select Access Mode Change 10400422 002 02 2013 2013 Overland Storage Inc 45 95 SnapSAN 3000 S Snapshot User Guide Access Mode Change Execution Result Umexecutable Information Link LV Number LV OS T Connecting R W Permit 0046h ii Summary Details A Change link volume Access Restriction Please select setting value from the following list iit Specific Access Mode R U Permit C Read Only C Not Ready C Not Available Choose volume which you want to execute from list then click Execute button It is possible that multiple volumes are chosen and executed Figure 5 99 Access Mode Change From the list select the link volume whose access mode you want to change and then click the Execute button You can specify two or more volumes at a time and execute the operation for all of them simultaneously Unexecutable volumes cannot be selected Selected Volume List This part of the screen displays a list of the information about the link volume selected from the information list display area If Unexecutable is shown in the Execution Result field the volume does not meet the execution conditions and therefore cannot be selected If there is any unexecutable volume refer to the Unexecutable Information and take one of the following actions Unexecutable Inf
101. Allocated to the FC connection host assign iSCSl Allocated to the iSCSI connection host linked Snapshot link is set locked A logical disk that is locked with configuration setting operation guard locked BV A base volume BV is locked with configuration setting operation guard Eliminate these states before unbinding the logical disk Unbinding the Snapshot Reserve Area The work of unbinding the snapshot reserve area is done using the Snapshot Reserve Area Unbind screen in the wizard format as follows 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 67 SnapSAN 3000 S5000 Snapshot User Guide Snapshot Reserve Area Unbind A pool of which snapshot reserve area is unbound is selected Confirmation Snapshot data volume to unbind are displayed Check whether the settings are correct Completion The link volume unbinding result is displayed Snapshot Reserve Area Unbind Snapshot Reserve Area Unbind gt Confirmation gt Completion Physical disk type Fres cCapacicy ce Capacity Icey 0001h P0010001 RAIDE sas 304 2 247 5 Cancel L Help Figure 5 61 Reserve Area Unbind Wizard Select a pool of which snapshot reserve area is unbound from the list Pools that meet any of the following conditions cannot be selected SV SRV A pool has an SV or an SRV locked The configuration setting operation guard is set to the snapshot data volume Next button Proceeds to the Con
102. CESS MOGE srinuisrratanaaita ikana aan ARAN aa aaa nia aa aaa aaa aaa anai 5 95 Displaying the Volume CONNECTION STATUS ccecseseseeccseeseseesssesseseeeesessesessescssescssescssescseescseeesaeeesaseesaees 5 98 CV OUTPUT ot IATORMOMION LIST sissa aa a A A aak 5 107 Updating to the Latest IMOnmnaton sssrinin an aa a aaa ia 5 109 Dpiayng snapshot IMONMGIOM sisisi aaa aa E rel asda eee 5 111 Configuration Display COMMANA ISMview s sssssssssssssssssssssssssesisessrsesisesesstsnsisesesissnsinesisssnseneseness 5 114 Snapshot Configuration Information File OUTPUT FUNCTION sessssssssencmeraraercanonenunnra 5 118 Chapter 6 SnapControl DSTOMON YDES shores esaa E E E E N O E a E 6 3 Direct Operation TOF a DI KAMOY nriran neni si n N E E ENEE 6 5 Operations Linked with SNGPSAN Mandgar sensorer rran ORRO 6 7 VOUME TYPE Sesiinae ei a diss Suh a N a dea ETE EE 6 8 Operaion Volume Seting FIE seieceedessascessceteracanesiseesdieasticatsasd dadtinden adie KARANA AENA AN EANAN a NaN EAAS 6 9 LOG OUTPUT areira AE EEEE EEEN A E E T 6 10 Volume List Creation Display cccsescssseccescsscscesseccesessessesecsscsecssesseecssessessssscsecsesseescsscssesesseesecseseseecescnaeaes 6 11 Main OPTIONS pesasini i EANA i Sa AAE AEA AATE 6 41 Displaying Logical Disk INFOMATION sesreseinesenrsirrissprcerries iarruin oepe n reine v narre ine a SaN 6 62 DISKO DGNOHONSscsscsccscacaseadcveacessacaucataacvsaleasanca a a a AN AN AAEE N E A ANEA 6 71 File System FUSS OMIM oi
103. Control Volume 10400422 002 02 2013 2013 Overland Storage Inc 46 36 SnapSAN S3000 S5000 Compliance WORM User Guide When you try to change a control volume that has already been registered in Candidate Volume List the following confirmation screen appears To change the control volume to the logical disk selected from Selected Volume List click the Yes button To return to the Define Control Volume screen without update click the No button The definition of control yolume ce e Figure 6 22 Change Control Volume Delete a Control Volume To delete the control volume that has already been registered in Selected Volume List select the logical disk to be deleted from Selected Volume List and click the Delete button Define Control Yolume 00ih 0005h WN LOCAL_DATA1 Tokyo_Customer_ 002h 0006h WN LOCAL_DATA2 Tokyo_Customer_ Figure 6 23 Delete Control Volume When you click the OK button on the Define Control Volume screen the message for confirming whether to save the definition information appears 10400422 002 02 2013 2013 Overland Storage Inc lt 4 6 37 SnapSAN S3000 S5000 Compliance WORM User Guide The definition of control volume 00027 g Do you want to save the definition of control volume pma el Figure 6 24 Save Definition When you click the Yes button for the confirmation the definition information is saved and the completion mess
104. Create an environment definition file and the environment according to the installation guide attached to the SnapSAN Manager Snapshot Management GUD Installation For details on the installation procedure refer to the installation guide attached to the SnapSAN Manager Uninstallation SnapSAN Manager Server Uninstallation For details on the uninstallation procedure refer to the installation guide attached to the SnapSAN Manager Snapshot Management GUT Uninstallation For details on the uninstallation procedure refer to the installation guide attached to the SnapSAN Manager Update SnapSAN Manager Server Update To update the SnapSAN Manager software uninstall the existing software and then install the new software For details on the installation and uninstallation procedure refer to the installation guide attached to the SnapSAN Manager SnapControl Operating Environment Operating system and linkage software For details on the OSs supporting this software and the linkage software that can be used in conjunction with this software refer to the installation guide attached to this software Required disk free space For details on the disk free space required to install this software refer to the installation guide attached to this software Note that this software is installed under the opt and etc directories Required memory For details on the memory capacity required to install this software refer to
105. HBT is specified the system displays information only dh option associated with the specified HBT If LUN is specified the system displays information only associated with the specified HBT and LUN a option Displays information associated with all logical disks al option Displays information only associated with specified logical disk numbers ae option Displays information only associated with specified logical disk names Displays information only associated with a specified drive letter or a path name ad option of the NTFS folder ap option Displays information only associated with specified physical disk numbers av option Displays information only associated with specified mount point volume names Displays information only associated with specified HBT If LUN is also specified ah option the system displays information only associated with specified HBT and LUN Displays information associated with logical disks and configuration information ai option Displays only information associated with specified PD Type if the PD Type attribute of the physical disk configuring the logical disk is specified Lists the physical disk numbers and logical disk numbers of control volumes and ctl option the corresponding disk array names i Displays the version information and the date when the volume list is created as p option the property information of the volume list Lists disk array information information about correspondence and
106. M Server File Yiew Operation Help s X MES SSD O Ready Running 02002000003013840268C E Ready Running 02002000003013840874C 54900 003 Ready Running 0200200000004C7F08A5 Date amp Time Process ID Process Name Message Message Text Fri Sep 28 14 43 49 2007 iSM99001 Connected with iSM server Server gt Con 192 168 1 123 8020 iSMCL 3 Das 3 F Figure 5 115 SnapSAN Manager Status 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 113 SnapSAN 3000 S5000 Snapshot User Guide Displaying Snapshot Information Configuration Display Command iSMview The options of the configuration display command that deal with the snapshot information are listed below After identifying the disk array using the iSMview d option the options listed below can be operated e sl option Displays the snapshot list information about the logical disk associated with the specified disk array e sln option Displays the detailed snapshot information about the specified logical disk e spl option Displays the list information about the snapshot pool of the specified disk array e spln splm option Displays the detailed snapshot information about the specified pool Displaying the Snapshot List Information About a Logical Disk When the sl option is specified the command displays the snapshot list information about the logical disk associated with the specified disk array iSMview sl Storage001 Snapsho
107. N S3000 S5000 Compliance WORM User Guide sv_type SV OS Type n Snapshot generation number Only is displayed for the SV that became a derived generation until a new generation number is given by recreating a snapshot aaaaaaaa SV snapshot status YYYY MM DD hh mm ss Snapshot creation time lt State gt Start Time Start time of the last snapshot operation create restore or delete lt State gt End Time End time of the last snapshot operation create overwrite restore or delete bbbbbbbb Amount of copied data different from the original when restoring data or the amount of deleted data when deleting data in KB dddddddd Capacity of the SV difference management area in KB MB GB or TB preserve_mode Preserve mode link_sts SV link status lv_ld_name LV logical disk name lv_type LV OS Type lv_volume_name Mount point volume name lv_path Drive letter or path name mounted to the folder of the NTFS volume accessed by users access_mode Access restrictions On the UNIX system Summary information when the summary option is specified BV Information LD Name bv_ld_name Type bv_type Special File special_file_ name State bv_state SV Information Type LdName1 n snap state YYYY MM DD hh mm ss link_sts Type LdName2_ n snap state YYYY MM DD hh mm ss link_sts Type LdName3 n snap state YYYY MM DD hh mm ss link_sts Description bv_ld_name BV logical disk name 10400422 002 02
108. OOl ii Snapshot deletion is started Choose volume which you want to execute from list then click Execute button It is possible that multiple volumes are chosen and executed Figure 5 79 Snapshot Deletion From the list select the snapshot volume from which you want to delete a snapshot and then click the Execute button You can specify two or more volumes at a time and execute the operation for all of them simultaneously Unexecutable volumes cannot be selected Selected Volume List This part of the screen displays a list of the information about the snapshot volume selected from the information list display area If Unexecutable is shown in the Execution Result field the volume does not meet the execution conditions and therefore cannot be selected If there is any unexecutable volume refer to the Unexecutable Information and take one of the following actions 10400422 002 02 2013 2013 Overland Storage Inc lt 5 80 SnapSAN 3000 S5000 Snapshot User Guide Unexecutable Information Snapshot Inactive Action Execute the operation for a snapshot volume whose snapshot state is active Snapshot Deleting The snapshot is already being deleted Snapshot Restoring Retry after restoration is completed The snapshot is guarded Execute the operation for an SV Guard unguarded snapshot volume The snapshot volume is connected to a link volume Execute the operation for a snapshot volum
109. Replication and Mirroring is configured for the disk array After updating the volume list display the information registered in the volume list to check that the items to be used such as logical disks partitions mount point volume names and mount points drive letters or NTFS folder names are all registered correctly If the batch or other file used for operation describes the logical disks partitions mount point volume names mount points drive letters or NTFS folder names and other information to be operated reflect the updated information in the volume list to that file Note that the snapshot operation command execution may abnormally end in the future operation if the information in the volume list contains an error or if the volume list information is inconsistent with the batch or other file used for operation 10400422 002 02 2013 2013 Overland Storage Inc 44 26 overland storage Chapter 5 SnapSAN Manager This chapter describes how to operate snapshot with SnapSAN Manager Application Server Backup Server Figure 5 1 Operating System with SnapSAN Manager Functions provided by SnapSAN Manager and shows the correspondence between these functions and the operation screens and command 10400422 002 02 2013 2013 Overland Storage Inc 45 1 SnapSAN 3000 S5000 Snapshot User Guide v Can be displayed or operated Cannot be displayed or operated Volume SV LV SRA binding SnapSAN Manag
110. S 10400422 002 02 2013 2013 Overland Storage Inc 42 10 SnapSAN 3000 S5000 Snapshot User Guide System Configuration Execute the following operation before creating a volume list if you use a control volume in the disk array with which the control volume attribute cannot be identified e Define the logical disk to be used as the control volume in advance in the control volume definition file To successfully register volume information in the volume list create a volume list in the following states e Pairs are separated when the RV is connected to the server e The link volume LV and snapshot volume SV are linked when the LV in the snapshot function is connected to the server The base volume BV and LV are not linked when the BV is connected to the server e Protected data is readable when the logical disk for which the WORM function is applied is connected to the server e The volume is in the In use state and accessible when the logical disk for which the power saving function is applied is connected to the server e The link path between disk arrays is normal when the Replication and Mirroring is configured for the disk array After successfully creating a volume list display the information registered in the volume list to check that the items to be used such as logical disks and special file names are all registered correctly Once the volume list is successfully created that information is maintained for
111. S Type BV Logical Disk Name Status Link Restore Different Value GB BV Mode Capacity GB Partition Name SV Pool Number SV Pool Name SV PD Type LV Number LV OS Type LV Logical Disk Name LV Mode BV 0004h NX DBsvr_01 Normal 33 2 D BServer 0000h Pool0000 FC yn Snapshot volume Type SV Number SV OS Type SV Logical Disk Name Status Guard Link Creation Time Generation Number Generation Attribute Used Capacity GB Restore Different Value GB LV Number LV OS Type LV Logical Disk Name LV Mode SV 0009h NX DBsvr_01_SV0 Inactive t t t m n n 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 107 SnapSAN 3000 S5000 Snapshot User Guide SV 000ah NX DBsvr_01_SV1 Active 2004 02 27 17 36 39 2 Normal 0 Bee ey ee SV 000bh NX DBsvr_01_SV2 Active Connecting 2004 02 28 17 47 17 1 Normal 0 4 0028h NX DBsvr_01_LV Read Only SV 000ch NX DBsvr_01_SV3 Active 2004 02 26 11 30 02 3 Normal 0 OL N Link volume Type LV Number LV OS Type LV Logical Disk Name Partition Name DV Number DV OS Type DV Logical Disk Name LV Mode LV 0028h NX DBsvr_01_LV DBServer 000bh NX DBsvr_01_SV2 Read Only Environment Settings Set the disk array information acquisition interval and snapshot volume view order From the menu bar select the fo
112. S5000 Compliance WORM User Guide e Note that the SV of the oldest generation except protected SVs and derived generation SVs without generation numbers is selected at automatic SV selection and deletion the selected SV is the chronologically oldest generation among the SVs including derived generation SVs with generation numbers e Ifthe target BV is paired as the MV for replication replication is not in the Replicate Preparing Restore restoring or Separate Preparing state e The disk array storing the target volume is not in the freeze state e The target volume is not a dynamic disk volume Windows system The following notes do not apply to joint operation with SnapSAN Manager e The target BV is registered in the volume list e Ifthe target BV is not registered in the volume list the following conditions must be satisfied e The LV linked to the target BV is registered in the volume list e Ifthe target BV is paired as the RV for replication the MV paired with the RV is registered in the volume list e The volume list is not being created e When specifying the combination of a volume group or a disk group with a logical disk name specify the same number of logical volumes as those constituting a volume or disk group on the side where the logical disk name is specified to the SV In this case snapshot deletion is performed in the specified order e When a volume group is specified the target volume group is active
113. SVS of S V 2 is returned to renumbered 1 Normal Sree tienen eer H Fi _ Namal SV Fi Derved SV Figure 3 6 Derived Generation Number Snapshot Cyclic Creation You can delete an unallocated SV or the oldest SV automatically when you create a snapshot For snapshot cyclic creation snapshots for free SVs and SVs to which an SV unguarded generation number is given are created in order cyclically Note that the behavior of the cyclic creation by SnapControl differs from that by the SnapSAN Manager client when snapshots have been created in all the SVs and the oldest SV has been linked with LV e A snapshot cannot be created by the SnapControl cyclic creation e A snapshot is created for the next oldest generation except for the linked SVs when cyclic creation is executed by the SnapSAN Manager snapshot operation When SnapControl is operated in cooperation with iSM the SnapControl behavior is the same as the behavior of the SnapSAN Manager snapshot operation Guard created snapshots Use volumes in order Guard setting Figure 3 7 Cyclic Creation An example of cyclic creation of snapshots is shown below e From ti to t4 snapshots are created from SV 1 to SV 4 in order e SV guard is set for SV 1 after snapshot creation e Since guard is set for SV 1 snapshots are created cyclically from SV 2 to SV 4 at t5 and afterward e tn in the following table indicates a generation number creation time 1040042
114. Select Exit in File on the menu bar of the Volume List Display screen e Click the close button of the system menu When the Volume List Display screen is terminated the window size column width of the list view and screen position on the Volume List Display screen being displayed are stored automatically The stored screen information takes effect when the Volume List Display screen is started next Selecting Disk Array Name Click the pull down button of disk array Selection Combo box on the Volume List Display screen and select the target disk array The information of only the selected disk array is displayed Select the target disk array from the disk array Selection Combo box on the Volume List Display screen The volume information on the selected disk array is listed 10400422 002 02 2013 2013 Overland Storage Inc lt 6 28 SnapSAN S3000 S5000 Compliance WORM User Guide il volume List Display oi x File View Operation Help ISESE W Volumel disk10 WeVolumef disk13 W Wolumef disk12 disk1 disk2 disk3 disk4 disk5 disk6 disk disk8 disk9 disk11 disk14 SPEDE sy tc_test_0013 Control 004h 00 52900 3 003h O01Ih rc_test S2900 3 MY FC 0005h 0005h 200000 200000099 IV SAS 006h 0006h 200000 200000099 IV SAS 007h 0007h 200000 200000099 IV SAS 008h 0008h 200000 200000099 IV SAS 0050h 0050h 200000 200000099 IV SAS 0S1h 0051h 200000
115. SnapControl in principle that operates on the application server e Only a logical drive on the primary partition or expanded partition can be selected as a target volume for snapshot operation Also only a basic disk can be used 10400422 002 02 2013 2013 Overland Storage Inc lt 4A 7 SnapSAN 3000 S5000 Snapshot User Guide Snapshot and Data Consistency Snapshot creation and restoration are executed in units of disks but not units of partitions Be careful in setting and operating partitions To prevent operation errors and trouble the partition settings on the BV and SV LV sides must be the same for all the servers e To ensure data consistency keep the following in mind e To create a snapshot keep a static point by mounting BV and the like e To create a snapshot release a link of the target SV e Before executing Restore unmount the BV and SV LV e The BV and SV LV file systems must be in the same format e Use the BV and SV LV on different servers When creating snapshot for volumes operating on Windows system the data applications and operating system are storing on buffer must be reflected on volumes using combination of iSMrc_flush command and iSMrc_umount command Tf file control information is not reflected on volumes an error message may appear upon using snapshot disabling use of SV LV Oracle or Microsoft SQL Server has a system of maintaining data consistency static point even under operati
116. SnapSAN 3000 S5000 Snapshot User Guide Completion Figure 5 64 Unbinding Succeeded The snapshot reserve area unbinding result is displayed When the processing succeeded the following links are displayed e Unbind another snapshot reserve area Opens the Snapshot Reserve Area Unbind screen to unbind another snapshot reserve area e Bind snapshot reserve area Opens the Snapshot Reserve Area Bind screen to bind a new snapshot reserve area Finish button Returns to the monitoring screen The snapshot reserve area cannot be unbound in the following conditions e Any snapshot volume exists in the snapshot reserve area e The configuration change of one of snapshot data volumes SDV configuring a snapshot reserve area is locked Snapshot Operation You perform a snapshot operation by first selecting the target volume from the volume list displayed in the snapshot management screen and then using the relevant menu that is chosen from the menu bar or displayed when you right click on the mouse Creating a Snapshot Cyclically Create a base volume snapshot cyclically in a snapshot volume The created snapshot can be used by connecting a link volume to the snapshot volume Display the Snapshot Cyclic Creation screen using one of the following procedures 10400422 002 02 2013 2013 Overland Storage Inc lt 5 70 SnapSAN 3000 S5000 Snapshot User Guide e Select a base volume from the information list display ar
117. Snapshot Cyclically When MV BV RV BV or RV MV BV is selected Repbcate Restore Resume Copy Change to Background Copy RY Mode Change Forced Separate Forced Cancellation of Update Prevention Snapshot Cydic Creation Creatine a Snapshot Cyclically When MV_RV or RV MV is selected Repicate Restore Suspend Copy Resume Copy Change to Background Copy RY Mode Change Forced Seperate Forced Cancellation of Update Prevention e When SV is selected Snapshot Creation gt Creatine a Snapshot Snapshot Deletion _ gt Deleting a Snapshot Snapshot Restoration Restoring Data froma Snapshot Snapshot Guard ei RE a Guarding a Snapshot Snapshot Guard Cancel Canceling the Snapshot Guard e When LV is selected ink Setting Settinga Link Unink ee E Unlinking Access Mode Change Changing Access Mode Properties Displaying Link V olumeProperties J Figure 5 108 Connection Flow e When you select multiple volumes from the list to display the connection screen the number of volumes you can select is restricted You can select up to 25 volumes e Ina case of volumes outside SnapSAN Manager management monitoring stop freeze or disconnection from the SnapSAN Manager server and if various execution screens are displayed from the Snapshot screen or t
118. Snapshot Guard Classification Setting Cancellation Command The iSMsc_svguard command is used for setting canceling a snapshot guard classification 10400422 002 02 2013 2013 Overland Storage Inc 46 55 SnapSAN S3000 S5000 Compliance WORM User Guide Executing the iSMsc_svguard command sets the guard classification of a SV to prevent the SV from being overwritten during cyclic use or cancels it to allow cyclic use again Main Options For the iSMsc_svguard command you can specify the following options Specification of the target SV Specify the volume of the BV and the SV whose attribute is to be changed e Specification of the BV bv volume bvflg bv_flg Specify the volume and volume type of the BV e Specification of the SV sv volume svflg sv_flg Specify the volume and volume type of the SV e Guard setting guard canceling flag mode set cancel Specify whether to set or cancel the guard classification e Batch specification all Cancels all SV guard classifications under a BV together If no guard classification is specified for any SV the command ends normally without performing any operation Displayed Information The iSMsc_svguard command displays the following messages after snapshot guard classification setting cancellation On the Windows system iSMsc_svguard Info iSM19040 iSMsc_svguard has normally terminated BV ld_nametype Volume Name volume name Path path SV ld_nametype Generation
119. T LUN Disk No Disk Aray PD Type Volume Name Path kin k_name vas type hbt lun disk_num disk_aray_name pd_type volume_name psth 2013 Overland Storage Inc 46 16 SnapSAN 3000 S5000 Compliance WORM User Guide Property of Volume List File Version version Crested YYYY MM DD hh mm ss Owner Host Name host_nsme Disk Array disk_smsy_number Volume Information yyyy mm dd hh mm ss host_name disk_amay_ number volume_number volume_number Version information on the executed iS Mvollist command Execution date of the iSMvollistcommand Disk amay name Number of logical disk information volume information items for each disk amay registered in the volume list Logical disk number Logical disk name VAA Volume Absolute AVolume Cloningess OS type Host adapter number bus number and target ID LUN Physical disk number PD Type Mount point volume name Drive letter or path name mountad to the folder of the NTFS volume the user accesses Version information of the iS Mvollist command used to create the volume list Date when the volume list is crested or updated Host name of the server owning the volume list Total number of disk arrays in the volume list Total number of volume information items in the volume list viii When the tzt all option is spacified iSCSI information of all iSCSI volumes are displayed in the following volume list LDN LD Name kin Kd_nsme Execution Condition Disk Arr
120. The following series disk arrays can identify the purpose attribute of the logical disk bound as a control volume When the logical disk information is displayed by the SnapSAN Manager client and so on these disk arrays that can identify the purpose attribute of a control volume the identification information indicating that the purpose attribute of the logical disk is a control volume When you change a control volume you need to update the volume list When you add or delete a disk array rebind a logical disk or change setting of it or add or delete a logical disk that can be accessed from a server be sure to update the volume list to the latest state As acontrol volume select a standard volume that is not used by data replication or snapshot Allocate the control volume as a dedicated volume and do not store business data in it A control volume must always be accessible so that an I O can surely be issued to a disk array from a server OS during operation Therefore do not perform pair setting for a logical disk bound as a control volume as RV 2013 Overland Storage Inc 46 6 SnapSAN S3000 S5000 Compliance WORM User Guide Operations Linked with SnapSAN Manager Operating SnapControl together with the SnapSAN Manager s snapshot management function enables you to execute the SnapControl commands on the management server The target logical disk does not need to be connected directly from the server nor does it need to
121. V file system Step 2 5 Unmounting LV SV Step 2 6 Releasing a link between LY and sv Restarting applications Figure 4 8 Secondary Use Snapshots Flow Operation Procedure Application Server An application server creates a BV snapshot regularly 10400422 002 02 2013 2013 Overland Storage Inc 44 13 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault 1 Terminating applications application server To keep data consistency terminate or halt the operations and applications accessing the target volume When the shared folder is used in the target volume cancel the share temporarily When operations and services are not terminated or halted or access is made to the shared folder unmounting in Step 3 will fail Example Halting a service NET STOP service name When halting a service ESMCommonService specify as follows NET STOP ESMCommonService Example Canceling sharing of folder NET SHARE share name delete When canceling the sharing of the folder bv_folder1 specify as follows NET SHARE bv_folder1 delete 2 Flushing BV file system application server Flush the BV file system to write unwritten data in the buffer of the file system to a disk iSMrc_flush drv G 3 Unmounting BV application server It is necessary to create the complete static point of BV data This is for writing the metadata of the file system completely to the disk This is also for s
122. V BV for DB control file 0004h DB_ARCHIVE_BV BV for DB archive file oooh DB_DATA_SV SV for DB data file ooh DB_REDO1_SV SV for DB REDO file 1 0042h DB_REDO2_SV SV for DB REDO file 2 0013h DB_CTL_SV SV for DB control file 0014h DB_ARCHIVE_SV SV for DB archive file 0020n DB_DATA_LV LV for DB_DATA_SV access 0021h DB_REDO1_LV LV for DB_REDO1_SV access 0022h DB_REDO2_LV LV for DB_REDO2_SV access 0023h DB_CTL_LV LV for DB_CTL_SV access 0024h DB_ARCHIVE_LV LV for DB_ARCHIVE_SV access O02ah BACKUP_CV Control volume 0100h Blank SDV1 Snapshot data volume e Set the OS type to LX the default value for the LX systems excluding snapshot data volumes e This example shows logical disk names conforming to the database configuration Access Control is necessary for a system in which the snapshot function is installed Before performing the following operations enable Access Control setting In addition Access Control setting needs to be performed for volumes that have already been used for other operations 10400422 002 02 2013 2013 Overland Storage Inc 42 7 SnapSAN 3000 S5000 Snapshot User Guide System Configuration Binding the Snapshot Reserve Area The snapshot reserve area SRA must be prepared in the pool where a snapshot volume SV is created The snapshot reserve area is bound by the configuration setting function of the SnapSAN Manager client For details on the construction procedure refer to the Snapshot User s Manu
123. V or SV linked to LV When unlinked LV is put in the Not Ready state and cannot be accessed Figure 3 16 Unlinking To unlink the following conditions need to be satisfied e A link is set to the specified volume e The specified LV and SV are unmounted from a host e The disk array storing the target volume is not in the freeze state Mixed Operation with the Replication Function This section describes effects and methods of using the data replication function and the snapshot function together The advantages of data replication are outstanding performance and reliability during use of a replication volume because a replication volume is physically independent Therefore data replication suits secondary use or backup operation that needs high performance and high reliability 10400422 002 02 2013 2013 Overland Storage Inc 43 16 SnapSAN 3000 S5000 Snapshot User Guide The advantage of snapshot is the cost for replication volume capacity because a replication volume needs only differential data capacity Therefore snapshot suits operations that emphasize capacity cost of storage Make use of advantages of the functions to construct the system and execute backup operation effectively Comparison between Snapshot and Replication Operation Snapshot Replication The amount for update datais The same amount as master Replication capacity cost needed is needed Reference unit of replication Volume Volume Read
124. _name attribute capacity pd_type protection_stste Description The items not describad below are the same as those in 1 Refer to 1 for the description of these items protect_state Whether the logical diskis protectad by the WORM fimction Unprotected logical disk When the node option is specified Logical disk information as shown below is displayed Receiving Disk Arasy Nseme Msnsgement LDN OS Type LD Name Attribute Cspscitty PD Type Node Number disk_esrmrsy_nsme manasgement kin type ki_nsme attribute cspscity pd_type node_number Description The items mot described below are the seme as thosein 1 Referto 1 for the description of these items nede_number Node number to which the logical disk belongs When it is not a logical disk of the disk amay with node or that the node mumber cannot be acquired hyphen is displayed 2013 Overland Storage Inc 46 65 SnapSAN S3000 S5000 Compliance WORM User Guide Execution Conditions To execute the logical disk information display operation the following conditions must be satisfied The following do not apply to a joint operation with iSM At least one logical disk of the target disk array is registered in the volume list The volume list is not being created or updated The iSM only special file must not be being created HP UX system and Linux system only The logical disk to be displayed must meet any of the following conditions for the disk ar
125. acity of a single snapshot data volume SDV is 2046 GB Therefore to bind 2 or more TBs of snapshot reserve area requires more than one SDV When the snapshot reserve area is bound from iSM the number of SDVs and the SDV capacity are determined as follows e Number of SDVs to be bound N Data area 1 management area 2 2046 GB 1 e SDVs to be bound SDV 0 SDV 1 SDV N 1 e SDV 0 capacity SDV 1 SDV N 2 2046 GB e SDV N 1 capacity 3 Data area management area mod 2046 GB N 1 m MB 10400422 002 02 2013 2013 Overland Storage Inc 47 1 SnapSAN 3000 S5000 Snapshot User Guide Snapshot Reserve Area e Management area per SDV m MB m 1 or 32 depending on the disk array type 1 Data area User specified capacity 2 Management area 2 GB m MB There is no SV at the time of binding 3 If the capacity of SDV N 1 is 256 MB or less an LD of less than 256 MB cannot be bound This is corrected as follows SDV N 2 capacity 2046 GB 256 MB SDV N 1 capacity SDV N 1 capacity 256 MB SnapSAN Manager allows you to specify all the free space of the pool when binding the snapshot reserve area In this case the equations shown above assume that the total of the data area and management area is the free space of the pool In the following examples the size of the management area per SDV is 1 MB Example 1 When the user specified capacity is 1600 GB Data area 1600 GB SDV 1600 GB 2 GB
126. after expansion 16 0 gt 7 179 069 106 Bytes Capacity before expansion Chick Advanced for modifying the default settings in the field above Snapshot data volume iist When the servings are OR citeh Ser Co start expanding the snapshot reserve area It you vant to modity any settings click Back T e Cancel C m Figure 5 47 Capacity Expansion Confirmation This screen is to confirm the settings about capacity expansion Check whether the displayed settings about the snapshot reserve area to expand are correct Advanced button Opens the advanced settings screen Set button Displays the following confirmation dialog box fi Is it OK to suspend monitoring of the disk array to start Snapshot Reserve Area Expansion tes ie Figure 5 48 Capacity Expansion Confirmation Clicking Yes starts expanding the snapshot reserve area The Completion screen is displayed when the processing completes Back button Returns to the Snapshot Reserve Area Expansion screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends 10400422 002 02 2013 2013 Overland Storage Inc 45 58 SnapSAN 3000 S5000 Snapshot User Guide Advanced Settings Sy Capacity Expansion Configure the advanced settings Snapshot reserve area Snapshot capacity 0 068 0 Bytes Snapshot management capacity 3 068
127. age Inc 46 9 SnapSAN S3000 S5000 Compliance WORM User Guide Log Output Snapshot outputs log data regarding command executed snapshot operations and display requests to a command trace file 2004 03 13 16 40 12 861 host1 SC CLI 0000003504 Info sc_create iSM19000 2004 03 13 16 40 13 237 host1 SC CLI 0000003504 Info sc_create iSM19011 2004 03 13 16 40 32 516 host1 SC CLI 0000003865 Info sc_create iSM19000 2004 03 13 16 40 32 577 host1 SC CLI 0000003865 Info sc_create iSM19011 2004 03 13 16 40 40 417 host1 SC CLI 0000003866 Info sc_create iSM19000 2004 03 13 16 40 41 462 host1 SC CLI 0000003866 Info sc_create iSM19011 2004 03 13 16 41 05 287 host1 SC CLI 0000003905 Info sc_link iSM20021 2004 03 13 16 41 05 930 host1 SC CLI 0000003905 Info sc_link iSM20200 2004 03 13 16 41 05 983 host1 SC CLI 0000003910 Info sc_link iSM20021 2004 03 13 16 41 06 855 host1 SC CLI 0000003910 Info sc_link iSM20200 Content of the command trace file The following information is output to the command trace file e Input images of snapshot operation commands and common information e Execution results of commands and common information The common information includes the time when the information was output and the identifier for the command issue process The content of the message that is displayed on the terminal at the time of command execution is output to the command trace file in the case
128. age appears To return to the Define Control Volume screen click the No button The definition of control volume x i 00028 J Succeeded in saving the definition of control volume The definition of control volume was completed Please create update the volume list OK Figure 6 25 Complete Save Definition To close the Define Control Volume screen and return to the Volume List Display screen click the OK button To enable the saved definition information create or update the volume list to reflect the definition information of the control volume to the volume list When you click the Cancel button on the Define Control Volume screen the message for confirming whether to cancel the definition appears When you click the Yes button for the confirmation the definition information is not saved The Define Control Volume screen is closed and returned to the Volume List Display screen To return to the Define Control Volume screen click the No button The definition of control volume i 9 00029 The definition of control volume is not saved Do you want to exit the definition of control volume m Figure 6 26 Control Volume Exit Update the volume list to reflect the updated definition information to the volume list Select File Create Update Volume List from the Volume List Display screen to create and update the volume list and reflect the saved definition information of the control
129. ain on the screen of Volume List Display Defining Control Volume To start the screen for defining a control volume select Operation Define Control Volume from the Volume List Display screen A control volume is a volume used for issuing a control I O to a disk array from a server When defining a control volume select a standard volume that is not used by data replication or snapshot Allocate the control volume as a dedicated volume and do not store business data in it The purpose attribute of logical disks bound as control volumes can be identified with the SnapSAN 83000 S5000 When the logical disk information is displayed by the SnapSAN Manager client and so on for disk arrays on which the purpose attribute of a control volume can be identified the identification information indicating the control volume as a logical disk purpose attribute is displayed The control volume setting procedure differs depending on the disk array functions as shown below Disk Arrays Identifying the Control Volume Attribute There is no need to use this function to define the control volume First bind the control volume using the SnapSAN Manager server s configuration function once the control volume is recognized by the server create or update the volume list When the volume list is created or updated the disk array identifies the control volume attribute from the logical disks connected to the server and registers it on the volume lis
130. ait 5 Mounting BV application server Use BV again as a business volume Mount BV to associate with a file system iSMrc_mount drv G 6 Restarting applications application server Restart the applications and services that have been terminated in Step 1 If services have been halted in Step 1 restart the services by the following procedures If services were not halted in Step 1 it is not necessary to execute the following Example Starting service NET START service name To start the service ESMCommonService specify as shown below NET START ESMCommonService If sharing of the folder was cancelled in Step 1 specify the sharing again If sharing was not cancelled in Step 1 it is not necessary to execute the following Example Sharing of shared folder NET SHARE share_name drive_letter path To enable the sharing of the folder bv_folder1 specify as shown below NET SHARE bv_folder1 G bv_folder1 7 Waiting for restoration completion application server Wait for the restoration to complete iSMsc_wait cond active bv bv001 bvflg ld sv 1 svflg relgen Data Restoration with Use of Snapshot Function Physical Fault When the BV data file or BV volume cannot be accessed due to a physical fault BV can be recovered from a tape or another backup device 10400422 002 02 2013 2013 Overland Storage Inc 44 8 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault In this section assuming t
131. al Function Guide Binding a Snapshot Volume To bind a snapshot volume SV specify the logical disk BV from which a snapshot is to be replicated and the necessary number of generations A snapshot volume is bound by the configuration setting function of the SnapSAN Manager client For details on the binding procedure refer to the Snapshot User s Manual Function Guide Binding a Link Volume To bind a link volume LV specify a base volume BV in advance A link volume LV is bound by the configuration setting function of the SnapSAN Manager client For details on the binding procedure refer to the Snapshot User s Manual Function Guide Access Control Setting Usually you need to set the system with snapshots so that the created snapshot images cannot be referenced by an application server that uses BV to prevent a wrong update to a volume or a wrong modification of the disk configuration on an application server Therefore to use snapshots you need to limit logical disks that can be accessed from a server by using Access Control To use snapshots take note the following points and set Access Control Setting Access Control e Connect BV to an application server e Connect LV to the server that accesses SV e Do not connect SV and SRA SDV to a server e Connect CV to the server to which SV LV is assigned Before introducing servers you must determine the server connection modes and design Access C
132. al capacity pool from the Status Monitoring screen Used Capacity GB Displays the used capacity of the pool For the virtual capacity pool displays the actual used capacity Check the used capacity of the virtual capacity pool from the Status Monitoring screen Snapshot Capacity GB Displays the capacity of the snapshot reserve area Snapshot Used Capacity GB Displays the used snapshot capacity It is the sum of the used capacities of the snapshot volumes that belong to the pool Note that it may not match the sum of the used capacities of snapshot volumes being displayed because the Snapshot Used Capacity is represented in 0 1 GB units If a threshold excess occurred in used snapshot capacity the icon appears at the left of the displayed value Snapshot Threshold GB Displays the snapshot threshold 10400422 002 02 2013 2013 Overland Storage Inc 45 16 SnapSAN 3000 S5000 Snapshot User Guide Base Volume Unit List Figure 5 13 Base Volume Unit List The base volume unit list displays a list of volumes that are associated with the base volume selected in the configuration display area The volumes displayed in this list are the base volume selected in the configuration display area the snapshot volumes set in the selected base volume and the link volumes having these volumes as link permit volumes Base volume unit list base volume The base volume display area of the base volume unit lis
133. al disk name type OS type volume_name Mount point volume name path Drive letter or path name mounted on the NTFS volume folder accessed by users 15M13220 Setting drive letter drive has succeeded Message output when a drive letter or an NTFS folder name is set Execution Conditions To perform Mount the following conditions must be satisfied e The target volume is registered in the volume list e The target volume is in the Read Write available state or is a volume changed to the Not Ready state when the iSMrc_umount command unmounts the volume e A dynamic disk cannot be specified e The update prevention state of the operation target volume is not Prevent by the volume update prevention function 10400422 002 02 2013 2013 Overland Storage Inc 46 73 SnapSAN S3000 S5000 Compliance WORM User Guide e The volume is recognized by the OS When the server is restarted while the access restriction for the disk has been set to the Not Ready state by the unmount operation the volume is not recognized by the OS In this case after restarting the server use the iSMrc_scan command to release the Not Ready state and scan the devices to let the OS to recognize the volume before performing the mount operation Volume Unmount Command To unmount a volume the iSMrc_umount command is used The iSMrc_umount command cancels the association of volumes of each partition with file systems Unmounting a volume flushes the file
134. al fault occurs in BV none of snapshots of all generations set in BV can be accessed Check and measures You can check whether a physical fault occurs in BV on the main window of the SnapSAN Manager client When a BV physical fault occurs recover from the fault executing the following steps e Deleting LV Delete LV on the configuration setting screen of the SnapSAN Manager client e Deleting generations Delete snapshots of all generations on the configuration setting screen of the SnapSAN Manager client e Recovery from a fault Eliminate the cause of a fault and rebind BV e Recreating generation Recreate the snapshot generation on the configuration setting screen of the SnapSAN Manager client e Recreating LV Recreate LV on the configuration setting screen of the SnapSAN Manager client For the logical disk number created as LV you need to assign the same number as that of the logical disk before deletion SnapSAN Manager Server or Client Fault Faults when the SnapSAN Manager server and the SnapSAN Manager client are used Abnormal End of SnapControl SnapControl outputs error contents to the standard output standard error output event log command trace or operation trace when an error has occurred The standard output standard error output event log or command trace records the messages Take necessary actions depending on the message The command trace is output in the etc folder under the folder where SnapCon
135. and Write are available Read and Write are available Mounting to local and other Mounting to local and other Access to replication servers is available servers is available Effect on master at replication Affected Not affected access At a base volume fault a Even at a master volume fault Action against a physical fault snapshot is also lost replication data is retained A base volume can be A master volume can be Action against a logical fault restored using snapshot restored using replication Volume Cloning Link Operation lt Creating replication gt e Retain replication in RV at long intervals for example a day using data replication Back up data from a backup server to an external medium regularly Action against physical faults e Retain a snapshot in multiple SVs at short intervals for example one hour using snapshot Action against an operating error or other logical faults lt Advantages of concurrent use gt e Itis possible to minimize damage of a logical fault by collecting a snapshot at short intervals and retaining the latest image e Itis possible to recover from a physical fault promptly by creating replication RV at long intervals using data replication restoration from RV e Itis possible to reduce effect on a business volume by using the replicated RV for backup 10400422 002 02 2013 2013 Overland Storage Inc 43 17 SnapSAN 3000 S5000 Snapshot User Guide Application Server Backup Ser
136. another disk management tool may differ because handling the order of bytes for disk signature data is different e Therefore when you use a disk signature value displayed or stored by the iSMrc_signature command with another disk management tool pay attention to the value e The target physical disk is registered in the volume list e The target physical disk is not Not Ready e Specifying a volume of a dynamic disk or a GPT format partition disk is not allowed e When the update prevention state of the target volume is Prevent operations to initialize the signature on the physical disk and to restore the disk signature saved in the map file cannot be performed Devices Scan Command To scan devices the iSMrc_scan command is used Executing the iSMrc_scan command scans devices and lets the system recognize available devices When the system is starting up with the devices not connected to the system or in Not Ready state the system cannot recognize those devices For example a server using RV is restarted in the state where the RV is put in the Not Ready state by replication operation the RV is not recognized by OS In this case to make OS recognize the RV separate the pair put the RV in the Read Write available state and then execute the command If the device access restriction is changed to the Not Ready state by unmount of the iSMrc_umount command release the Not Ready state to scan the device Executing this comman
137. any writes a configuration in which an SSD is used as the BV and an inexpensive disk is used as the SRA SDV is inappropriate because performance delays that occur while writing differential data to the inexpensive SRA SDV disk result in BV writing overhead making it impossible to fully utilize the SSD It is possible to check the physical disks that make up volumes by referring to the PD type in the snapshot state screen or PD Type reports of the iSMvollist and iSMrc_ldlist commands 10400422 002 02 2013 2013 Overland Storage Inc 43 25 overland storage Chapter 4 Operation and Maintenance Logical Fault and Physical Fault A replication volume created by the snapshot function has the following features e Itis a virtual volume holding only the differential data block with a copy source volume e It shares the data block other than the difference with a copy source volume Therefore the snapshot is affected differently depending on the fault type Logical Fault It indicates a fault that unintended and invalid data is written to the business volume due to an operation error or an application fault Overwriting data or deleting necessary files mistakenly garbled data due to application fault etc are the cases A logical fault is caused not by hardware fault but by human error or software problem When a logical fault occurs in the copy source business volume copy destination snapshot is not influenced You can restore
138. apshot User Guide System Configuration Logical Disk Volume Manager Disk VM Disk Disk Group Group of VM Disks Volume Figure 2 8 VxVM Disk Generation Creation and Replication Setting a link of a volume backup server Set a link from LV to SV for which a snapshot was created in Step 2 In this example assume that a link is set from link volume 1v001 to logical disk name sv001_1 iSMsc_link lv lv001 lvflg sv sv001_1 svflg ld Writing data to a partition table backup server To make a backup server recognize partition information use the fdisk command and others to write data to a partition table To write data to a partition table using the fdisk command execute the following fdisk dev sdb Select w subcommand from the displayed menu and write data Recognizing the device path backup server To make VxVM recognize the device path execute the following command vxdctl enable Setting LV SV offline backup server Set LV SV disk status offline vxdisk offline sdb Unlinking a volume backup server Release a link to SV set In this example assume that a link set from link volume lv001 to logical disk name sv001_1 is released iSMsc_unlink lv lv001 lvflg ld sv sv001_1 svflg ld 10400422 002 02 2013 2013 Overland Storage Inc lt 4 2 14 SnapSAN 3000 S5000 Snapshot User Guide System Configuration About recognition of partition information When a server was made to recognize
139. are fault and becomes unavailable It requires physical restoration such as hardware exchange When a physical fault occurs in the copy source business volume and data is destroyed copy destination snapshot also becomes unavailable Volumes in the disk array are in RAID configuration and data is not destroyed unless multiple faults occur In case of physical fault however you must restore data from other media not from snapshots Example of Applying Snapshot Backup Operation Backup from a snapshot to a magnetic tape medium Backup is performed from a snapshot of a business volume to a tape or other backup media Data is saved from a snapshot to a tape or other backup media and restored from a backup medium when a business volume fault occurs When you back up data during normal operation you need to stop operation only while you create a replication volume from a business volume Therefore you can reduce operation down time significantly 10400422 002 02 2013 2013 Overland Storage Inc lt 4 1 2 SnapSAN 3000 S5000 Snapshot User Guide Backup Operation Application Server Backup Server Disk Array Figure 1 2 Backup from a Replication Volume lt Creating snapshots gt Create a snapshot from an application server 1 Temporarily halt actual operation and ensure the static point 2 Create a BV snapshot in SV 3 Resume the actual operation lt Backup operation gt 1 After creating a snapshot save data from a ba
140. areti avieletaaraaretaneegis aa edic add ato aT Naat B 1 OPENSSE LICENSE cest cestiaietenvisetsposverticatestehs heaton aa evened hea Aaa N EE a aaa SEA SEAE NE NUE AAS B 10400422 002 02 2013 2013 Overland Storage Inc 42 SnapSAN Snapshot 3000 S5000 User Guide Index 10400422 002 02 2013 2013 Overland Storage Inc 43 overlang storage Chapter 1 Overview Snapshot is software for creating replication snapshot image at high speed and low cost on a logical disk basis For snapshot data only the differential data in the replication source logical disk is retained in storage Therefore you can maintain snapshot images with less capacity than the replication source logical disk and use the replication volume at low cost Snapshot provides basic functions to extend online operation time and support 24 hour operation for 365 days such as processing data efficiently that increases day to day and performing online tasks and batch or backup processing in parallel that is performed during the night The snapshot function creates replication of a business volume snapshot image and the function to control replication is installed in the disk array A replication volume can be created instantaneously at any time Snapshot operations are executed from an application server or an SnapSAN Manager client Windows system This chapter describes the basics such as an overview of snapshot hardware configuration and software configuration A
141. arrays and disk array names iSMrc_lIdlist d e To display the list of logical disks in the disk arrays and the logical disk information iSMrc_ldlist de Disk array name Select and describe one logical disk for each disk array If you describe multiple logical disks in the same disk array the information on the first one becomes valid and the information on the second and subsequent ones is ignored File location and file name etciSMrpl ctlvol conf 10400422 002 02 2013 2013 Overland Storage Inc 42 9 SnapSAN 3000 S5000 Snapshot User Guide System Configuration Format Describe the logical disk numbers and disk array names of all the control volumes used in the relevant server Write the set of logical disk number and disk array name corresponding to each control volume on a single line by delimiting these sets with line feed The logical disk number on each line should be in hexadecimal Delimit the logical disk number and disk array name with a space or tab character On each line the text after the pound symbol is regarded as a comment and ignored A description example is shown below ControlVolumes LDN Disk Array Name 002a Customer_DataBase Rules e Start description at the first column on the line e Use the line feed to delimit records e One record should be up to 1 024 characters 1 byte e One record describes one control volume e The text from the pound symbol to the end of the record is re
142. as shown below is listed Contro Volume List Specis File LDN Disk Arsy Name Path specis _file_nsme kin disk_srrsy_nsme psth Description spacial fle name Special filename Displayed as a 32 byte item on HP UX and Linux as well as 64 byte item on Solaris disk_amsy_name Disk amsy name path Whether to use a special file Usually this field is blank and nothing appears in this field however when data replication or snapshot is performed ifan error is detected in access to the special file B appears When the p option is specified Property information of the volume list as shown below is displayed Property of Volume List File Version version Crested YYYY MM DD hh mm ss Owner Host Name host_nsme Disk Array disk_srrsy_number Volume Information volume_number Description version Version of the iS Mvollist command used for cresting the volume list YYYYMMDD hh mm ss Date when the volume list was created or updated host_name Host mame of the server owning the volume list disk_aray_number Total number of disk arrays in the volume list volume_number Total number of volume information items in the volume list When the ax option is specified property information of the volume list are listed as shown below Volume List iSMvollst Version X X00 Date YYYY MM DD HH MM SS 2013 Overland Storage Inc lt 6 22 SnapSAN S3000 S5000 Compliance WORM User Guide 10400422 002 02 2013 D
143. ase volume is not snapshot fault e Data of the target base volume is not being migrated by the Data Migration function To execute the snapshot creation the base volume needs to be unmounted from the host However unmounting is unnecessary when the static point is ensured by hot backup online backup etc The snapshot creation operation also creates a new snapshot for a snapshot volume that already has a snapshot In this case the existing snapshot is deleted If the snapshot creation target volume is in the released state executing the snapshot creation operation places it in the active state Clicking the Cancel button from the Processing dialog suspends cyclic snapshot creation and redisplays the Snapshot Management screen If snapshot deletion is performed but snapshot creation is not performed the target snapshot state becomes invalid 10400422 002 02 2013 2013 Overland Storage Inc 45 79 SnapSAN 3000 S5000 Snapshot User Guide Deleting a Snapshot Delete a snapshot from a snapshot volume Display the Snapshot Deletion screen using one of the following procedures e Select a snapshot volume from the information list display area Then from the menu bar of the snapshot management screen select Operation Snapshot Operation Snapshot Deletion e Select a snapshot volume from the information list display area Then right click on the mouse and select Snapshot Deletion Snapshot Deletion DBSwr001_ DBSwr
144. ate of MV BV or RV BV The state of rpl preparing sep preparing and res preparing exists only on the MV side Snapshot Operations SV and Replication States 1 Creation of a Snapshot of MV MV Replication Separation Restoration State rpl exec rpl sep exec separated sep rst exec res rpl sync preparing preparing rst sync preparing Operation Creating a snapshot v v v p 2 Restoring a snapshot v 5 2 Deleting a snapshot v v v v Guarding a snapshot v v v v v v vA Setting an SV link v v v v v v Unlinking SV v v v v v y v Executable Unexecutable Not exist Snapshot Operations SV and Replication States 2 Creation of a Snapshot of RV State RV Operation Replication Separation Restoration rpl exec sep exec separated rst exec rpl sync rst sync Creating a snapshot Cl of Restoring a snapshot 7 v Deleting a snapshot v v v v Guarding a snapshot v v v v Setting an SV link v v v v Unlinking SV v v v v 10400422 002 02 2013 2013 Overland Storage Inc lt 3 20 SnapSAN 3000 S5000 Snapshot User Guide v Executable Unexecutable 1 In Separate immediate separation that makes RV available immediately it is possible to use RV even during separate execution sep exec as reflecting the difference between MV and RV to RV When however a snapshot is created the state needs to be in the separated separated state e Link operations BV and replication states Link opera
145. ated may not be reflected on snapshot If access is made to the created snapshot via LV without unmounting execute CHKDSK F after setting a link between LV and SV and executing mounting This step enables you to create a snapshot even if obtaining a static point by unmounting failed If executing the unmount command before a restore command execution for restoring a logical fault and before a link setting between LV and BV for restoring a physical fault take the following steps 1 Terminating applications Stop the applications and services that reference the target volume by a program running on the server Confirm that the applications and services are stopped then proceed to the next step 2 Executing iSMrc_umount Execute iSMrc_umount again with the force option specified The following is an execution example when drive letter G is specified iSMrc_umount drv G force This step enables you to execute unmounting forcibly and restore data When iSMrc_umount command for LV terminates abnormally 1 Restarting the server Follow Down of Server Machine Connected to SV LV steps to restart the server After restarting the server execute unmounting 2 Abnormal end of the iSMsc_restore command The state in which resetting the drive letter of BV or mounting the BV in the NTFS folder is canceled remains in the following case During control under which the BV is unmounted at start of Restore a server fails or resetting the d
146. ates a snapshot is created Inactive Indicates a snapshot is not created Indicates the state that data is being restored from snapshot Restoring volume to base volume Deleting Indicates the snapshot is being deleted Indicates the snapshot is released Creating a snapshot Released changes the status to active Restore Indicates the state that snapshot restoration was suspended suspended Fault Indicates the snapshot fault state Indicates that state in which a snapshot volume is in SV preparing preparation Indicates the state in which an error occurred when a Snapshot SV prepare fault volume was in preparation Restore preparing ndicates the state in which snapshot restore is in preparation Guard Displays the snapshot guard status Link Displays the state of the connection with the link volume Creation Time Displays the creation time of the most recent snapshot Nothing is displayed unless a snapshot has been created Generation Number Displays the generation number of the snapshot This item is shown when the snapshot is active or being restored For the derived generation without any generation number no generation number is displayed is displayed for the generation number at snapshot fault Generation Attribute Displays the generation attribute of the snapshot This item is shown when the snapshot is active or being restored Normal Indicates a normal generation Derived Indicates a generation with
147. ation If a control volume has been registered an I O is issued to a disk array using the control volume automatically The application server to which BV is connected can operate BV directly and no control volume is needed normally When the backup server uses SVs snapshot operations can also be performed from the backup server by preparing control volumes 10400422 002 02 2013 2013 Overland Storage Inc 46 5 SnapSAN S3000 S5000 Compliance WORM User Guide Appication Server Backup Server Figure 6 3 Operation Using a Control Volume In the SnapControl environment setting you need to set DIRECT issue an I O to a disk array directly for I O issuing path to a disk array Take notes on the following for direct operation to a disk array 10400422 002 02 2013 Set access control using the AccessControl function correctly to the logical disk of paired BV or SV LV to be operated and the logical disk used as a control volume and then connect the logical disks to each server Prior to the snapshot operation on each server create the volume list and register the logical disks to be operated in the volume list in advance When you use a control volume prepare a control volume for each server It is not recommended that the same logical disk should be used as a control volume from multiple servers A small capacity logical disk can be bound that is dedicated to a control volume There is no limitation as to the RAID format
148. ation the following conditions must be satisfied e The target base volume is not being restored e The snapshot volume set in the target base volume includes an inactive volume or a volume with a generation number that is not guarded and connected to a link volume e Ifthe snapshot volume set in the target base volume does not include any inactive volume it does not contain any volume that is being deleted e The disk array is being monitored e The disk array is not in the freeze state e Ifthe target base volume is also used as MV the activity state of the pair is not Restore and the synchronous state of the pair is not Separate Preparing or Sync Preparing e Ifthe target base volume is also used as RV the activity state of the pair is Separate however not separate execution sep exec e The state of the target base volume is not restore fault e The state of the target base volume is not snapshot fault e Data of the target base volume is not being migrated by the Data Migration function To execute the snapshot cyclic creation the base volume needs to be unmounted from the host However unmounting is unnecessary when the static point is ensured by hot backup online backup etc The snapshot cyclic creation operation also creates a new snapshot for a snapshot volume that already has a snapshot In this case the existing snapshot is deleted 10400422 002 02 2013 2013 Overland Storage Inc 45 73 SnapSAN 3000 S500
149. ation with business Software Configuration Software that executes snapshot consists of the following components e SnapSAN Manager Provides the disk array configuration and state display functions Installing Snapshots allows the snapshot management function hereinafter referred to as the snapshot management incorporated in iSM The snapshot management provides the state display function for Snapshots and the setting and operating functions for snapshot operation e SnapControl Provides commands for checking snapshot operation and the snapshot state from the application server or the backup server e BaseProduct BaseProduct includes storage control software that administers basic control of the disk array device and SnapSAN Manager software that enables you to monitor basic states of the disk array e AccessControl Provides the function to set the logical disks that can be accessed for each application server 10400422 002 02 2013 2013 Overland Storage Inc 41 6 SnapSAN 3000 S5000 Snapshot User Guide Backup Operation e Snapshots Provides the function to implement snapshot 10400422 002 02 2013 2013 Overland Storage Inc lt 1 7 overlang storage Chapter 2 Installation Installation tasks are outlined below For details on each task refer to the associated sections Works followed by mark are necessary for all servers installing SnapControl including standby servers in cluster configuration
150. avorites Tools Help E A Q O P seach gt Folders F33 Address y My Computer Ho Hard Disk Drives amp P Local Disk C yp ene Local Disk E o oume i Devices with Removable Storage CD_ROM G Se Access to H Free Space 10 2 GB Total Size 13 8 GB J My Computer Z Figure 4 9 My Computer When SV LV is Not Ready and cannot be accessed the following message appears If this dialog appears SV LV is successfully unmounted x ws H is not accessib The media is write protected Figure 4 10 Media Error Message If a message above does not appear and access to the volume of the target SV LV is allowed an illegal RV file system is suspected Restore the system by the restoration procedures Restoration For restoration follow Down of Server Machine Connected to SV LV steps Down of Server Machine Connected to SV LV When the server connected to SV LV has gone down SV LV may not be recognized from the operating system after restarting the server This may occur when the server is restarted while the SV LV is placed in the Not Ready unavailable for read or write state by the unset link or unmounting using the iSMrc_umount command In this case you must make the operating system recognize SV LV This section describes how to do this 10400422 002 02 2013 2013 Overland Storage Inc lt 4 20 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physica
151. ax option configuration of all logical disks and the property information of the volume list tgt option Displays the targetname of the volume in the volume list Displays iSCSI information of all iSCSI volumes in the volume list all option Message 11932 is output if there is no iSCSI volume ldname option Displays iSCSI information of the specified volume Message 11933 is output if the specified volume is not iSCSI volume 10400422 002 02 2013 arrayname option Displays iSCSI information of all iSCSI volumes for the specified disk array Message 11933 is output if there is no iSCSI volume 2013 Overland Storage Inc 46 13 SnapSAN S3000 S5000 Compliance WORM User Guide Gi Gii 10400422 002 02 2013 Displayed Information When the cr option is spacifiad When the volume list is created or updated successfully the following messaze appears iSM11700 Plesse wat a minut iSM11701 Volume list is crested successfully When the d option is spacified Disk amay information as shown below is listad Disk Array List Disk Aray Name Number of Drives disk_srsy_name number Description disk_arsy_mame Disk amay name number Number of logical disk information volume information items for each disk amay registered in the volume list When the a option is specified Correspondence information about logical disks as shown below is listad Volume List iSMvollist Version X X 0X LDN LD
152. ay disk_srsy_nsme target_name Target Name Logical disk number Logical disk name Disk amay name Target name To perform the command operation on Windows the following condition must be satisfied 10400422 002 02 2013 2013 Overland Storage Inc lt 4 6 17 SnapSAN S3000 S5000 Compliance WORM User Guide e While the volume list is being created or updated it is not possible to display the volume list or execute replication operation commands and snapshot operation commands e Create or update the volume list when the OS on the server recognizes the logical disks and volumes For a replication volume RV of the data replication function the pair must be in the Separated state For a link volume LV of the snapshot function a link to a snapshot volume SV must be established e Create or update the volume list when a mount point drive letter or NTFS folder to be used has been set for volumes Command Operations UNIX On the UNIX system by using the volume list creation and display function by means of the iSMvollist command it is possible to obtain and display special file name logical disk name and associated OS type hereafter volume list of the logical disks in the disk arrays To specify the volumes in the data replication and snapshot operations it is necessary to create a volume list beforehand by executing the iSMvollist command because only the volumes that have already been registered in the volume lis
153. ay be terminated abnormally In this case to cancel reference or update by another application forcibly execute the CHKDSK command with F X specified e On Windows 2000 when the offline option is specified or if the volume to be unmounted is LV the access restriction of the disk logical disk is changed to in the Not Ready state Therefore if a volume on the disk with multi partition configuration is unmounted pay attention to the operation procedures because all volumes partitions on the disk are in the state where reference and update are disabled e Ifthe offline option is specified or if the volume to be unmounted is LV only one mount point drive letter or NTFS folder name is set in the target volume If no mount point is set or multiple mount points are set the volume is not unmounted e The update prevention state of the operation target volume is not Prevent by the volume update prevention function 10400422 002 02 2013 2013 Overland Storage Inc 46 75 SnapSAN S3000 S5000 Compliance WORM User Guide Disk Signature Operation Command For the disk signature operations the iSMrc_signature command is used A disk signature is system information used for identifying the disk on the Windows system On the Windows system two disks with the same signature cannot be used in the same system Data Replication automatically avoids the same disk signature when MV and RV are synchronized If a failure occurs during replicatio
154. before updating a volume list e Register the logical disk to be used as a control volume in advance by executing the Define Control Volume operation in the Volume List Display screen 10400422 002 02 2013 2013 Overland Storage Inc 44 23 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault To successfully register volume information in the volume list update a volume list in the following states e Pairs are separated when the RV is connected to the server e The link volume LV and snapshot volume SV are linked when the LV in the snapshot function is connected to the server The base volume BV and LV are not linked when the BV is connected to the server e Protected data is readable when the logical disk for which the data retention function is applied is connected to the server e The volume is in the In use state and accessible when the logical disk for which the power saving function is applied is connected to the server e All the volumes are mounted and every mount point to be used drive letter or NTFS folder name is set correctly e The link path between disk arrays is normal when the Replication and Mirroring is configured for the disk array After updating the volume list display the information registered in the volume list to check that the items to be used such as logical disks partitions mount point volume names and mount points drive letters or NTFS folder names are all regis
155. ber Only is displayed for the SV that became a derived generation until a new generation number is given by recreating a snapshot snap_status SV snapshot status YYYY MM DD hh mm ss Snapshot creation time link_sts SV link status 10400422 002 02 2013 2013 Overland Storage Inc 46 51 SnapSAN S3000 S5000 Compliance WORM User Guide Detailed information when the detail option is specified BV Information LD Name bv_ld_name Type bv_type Volume Name volume_name Path path State bv_state Pair Information SV LD Name sv_ld_name Type sv_type Generation n Snap State aaaaaaaa YYYY MM DD hh mm ss lt State gt Start Time YYYY MM DD hh mm ss lt State gt End Time YYYY MM DD hh mm ss Processing Data Size bbbbbbbbKB Snapshot Data Size ddddddddKB SV Guard preserve_mode LV Link Status link_sts LV LD Name lv_ld_name Type lv_type Volume Name lv_volume_name Path lv_path LV Access access_mode The LV information on Pair Information is displayed when a link is set Volume Name and Path are displayed when a link is set and the LV is recognized by the command execution server Description bv_Id_name BV logical disk name bv_type BV OS Type volume name Mount point volume name path Drive letter or path name mounted to the folder of the NTFS volume accessed by users bv_state BV state sv_ld_name SV logical disk name 10400422 002 02 2013 2013 Overland Storage Inc 46 52 SnapSA
156. c Disk Simple volume Span volume Stripe volume Mirror volume RAID 5 volume 7 v Recommended configuration Operation inhibited v Available with restrictions On Windows Server 20038 use the MOUNTVOL command provided by the operating system at system startup to disable automatic volume mounting before operation To disable automatic volume mounting specify the N option and execute the MOUNTVOL command as follows MOUNTVOL N When using a GPT disk When using partition disks in GPT GUID partition table format pay attention to the following e The OS type of the operation target logical disk must be set to WG 10400422 002 02 2013 2013 Overland Storage Inc lt 4 A 1 SnapSAN 3000 S5000 Snapshot User Guide Windows System Volumes and Partitions e Operation to GPT disks becomes available by changing settings of the option setting file e BV and LV must be used on different servers e For operations in which multiple LVs are configured for one BV each LV must be used on different servers Disk Containing Multiple Partitions or Logical Volumes When a drive letter is specified to execute snapshot operation for a logical disk containing multiple partitions or logical volumes all partitions or logical volumes on the logical disk become the target for the snapshot operation This is because snapshot operation is executed for an individual logical disk Example shows an example where eac
157. cal disk name is set that consists of the disk array specific 16 character string followed by a four digit hexadecimal logical disk number Completion 10400422 002 02 2013 2013 Overland Storage Inc 45 55 SnapSAN 3000 S5000 Snapshot User Guide je bink voluse Bind D Link volume binding succeeded Click a following tink if necessary Bind another link volume Click Finish to exit Monitoring of the disk array resumes Figure 5 45 Link Volume Binding Confirmation The link volume binding result is displayed When the processing succeeded the following link is displayed e Bind another link volume Opens the Link volume Bind screen to bind another link volume Finish button Returns to the monitoring screen Expanding the Snapshot Reserve Area The work of expanding the snapshot reserve area is done using the Snapshot Reserve Area Expansion in the wizard format as follows Snapshot Reserve Area Expansion The pool of which snapshot reserve area is unbound Confirmation Snapshot data volumes to unbind are displayed Check whether the settings are correct e Advanced Click this button to make detailed snapshot reserve area settings Completion The expansion result is displayed 10400422 002 02 2013 2013 Overland Storage Inc 45 56 SnapSAN 3000 S5000 Snapshot User Guide Snapshot Reserve Area Expansion Sext gt Cansel Heip Figure 5 46 Reserve Area Expansion Wizard Select
158. cation of the target volume Specify the volume of the BV or SV to be linked with the LV e Specification of the LV lv volume lvflg lv_flg Specify the volume and volume type of the LV e Specification of the BV bv volume bvflg bv_flg When linking the volume as the BV specify the volume and volume type of the BV e Specification of the SV sv volume svflg sv_flg When linking the volume as the SV specify the volume and volume type of the SV LV Access Restrictions Specify the LV access restrictions Displayed Information The iSMsc_link command outputs the following messages Common to Windows UNIX iSMsc_link Info iSM20020 iSMsc_link has normally terminated Execution Conditions To execute the linking operation the following conditions must be satisfied e The target volume is registered in advance in the link control list e The logical disk capacity and OS type of the specified LV matches those of the destination volume e The specified LV has not yet to be linked e The specified destination volume has not yet to be linked 10400422 002 02 2013 2013 Overland Storage Inc 46 58 SnapSAN S3000 S5000 Compliance WORM User Guide e The specified destination volume is a BV or SV e When the specified destination volume is an SV its activity state is snapshot active e When the specified destination volume is a BV restore or restore preparing is not being performed e When the specified destination volume
159. ckup server to a tape or other backup media 2 After creating a snapshot link LV to SV Mount LV to a backup server and save images retained in SV to a tape or other backup media via LV 4 After completing backup unmount LV 5 Unlink LV and delete SV lt Restoration gt At fault occurrence restore BV from a backup medium Backup Operation Using Snapshots of Multiple Generations Replication volumes of a business volume are created for multiple generations and saved to a backup medium on a regular basis At occurrence of physical fault such as disk fault data is restored from a backup medium At occurrence of logical fault such as operation error or application fault data is restored from the latest snapshot directly 10400422 002 02 2013 2013 Overland Storage Inc 41 3 SnapSAN 3000 S5000 Snapshot User Guide Backup Operation Application Server Backap Sener Figure 1 3 Backup Operation Using Multiple Generation lt Creating a snapshot gt Create a snapshot from an application server 1 Temporarily halt actual operation and ensure the static point 2 Create a BV snapshot in SV Circulation usage of multiple generations SV 1 SV 2 SV 3 SV 1 3 Resume the actual operation lt Backup operation gt Save data from a backup server to a tape or other backup media on a regular basis 1 Select the SV retaining the latest generation at backup execution and link LV to SV 2 Mount LV to a backup server a
160. curred in the target base volume This operation cannot be executed because a snapshot SV fault fault occurred in the target base volume Clicking the Execute button displays the following confirmation dialog 08221 Change base volume access mode to R W Permit Will you execute Figure 5 72 Execute Mode Execution Conditions To execute the base volume access mode change operation the following conditions must be satisfied The target base volume is not connected to a link volume Access mode of the target base volume is not R W Permit The disk array is being monitored The disk array is not in the freeze state The update prevention state of the target base volume is not Prevent The state of the target base volume is not restore fault The state of the target base volume is not snapshot fault Base volume Access Mode Change can be selected only when a base volume is selected from the base volume unit list in the information list display area Access mode of a base volume is changed to R W Permit by the base volume access mode change operation This operation is normally unnecessary Execute however only when access mode of a base volume cannot be returned to R W Permit from the host 10400422 002 02 2013 2013 Overland Storage Inc 45 75 SnapSAN 3000 S5000 Snapshot User Guide Creating a Snapshot Create a base volume snapshot in a snapshot volume The created snapshot can be used by connectin
161. d The work of expanding the snapshot reserve area is done using the Reserve Area Change screen in the wizard format as follows 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 60 SnapSAN 3000 S5000 Snapshot User Guide Free capaciey ce 0001h P0010001 PAIDE sas 304 2 347 5 Specity a threshold by the ratio or capacity Capacity Op C Snapshot reserve area capacity oc O Bytes Snapshot threshold oc 108 0 Bytes Figure 5 51 Reserve Area Change Wizard Select a pool Select a pool of which snapshot reserve area is to be changed from the list Pools that meet the following conditions cannot be selected locked A pool with a snapshot data volume on which configuration setting operation guard is set Configure the advanced settings Change the threshold Specify a threshold by the ratio or capacity Specify the threshold for the snapshot reserve area by using either of the following methods e Ratio Specify the threshold as the ratio to the snapshot reserve area capacity e Capacity Specify the threshold as the capacity of the snapshot reserve area Set button Displays the following confirmation dialog box ti Is it OK to suspend monitoring of the disk array to start Snapshot reserve area change ee CD Figure 5 52 Confirmation Dialog Box Clicking Yes starts changing the snapshot reserve area settings 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 61 SnapSAN 3000
162. d has the same effect as Rescan Disks by the Disk Management function of Windows Instead of using this command the devices can be recognized by the Disk Management function of Windows Main Options The iSMrc_scan command requires no options Displayed Information When the iSMrc_scan command is executed the following message appears The iSMrc_scan command may take tens of seconds to complete the operation Start message Scan Start YYYY MM DD hh mm ss End message Scan Normal End YYYY MM DD hh mm ss Description YYYY MM DD hh mm ss Start End time Year Month Day Hour Minute Second 10400422 002 02 2013 2013 Overland Storage Inc 46 78 SnapSAN S3000 S5000 Compliance WORM User Guide Concurrent Use with the Replication Function When the snapshot function and the data replication function such as Volume Cloning and Remote Replication are concurrently used it is possible to operate a snapshot of RV from a server OS that recognizes MV or to display information At this time it is necessary that pair setting of MV and RV and generation setting of the snapshot function have been set beforehand The following commands can be executed Command Name Description iSMsc_create Creates a snapshot SV iSMsc_delete Deletes snapshot SV data iSMsc_restore Executes restoration from a snapshot SV iSMsc_wait Waits for the specified snapshot SV state iSMsc_svguard Sets cancels SV guard class
163. dep Comeration Atdition assigned to the logical disk mader after the indicated mader Figure 5 29 Advance Settings Confirmed In this screen the detailed settings for a snapshot volume to bind are specified Starting logical disk number Specifies the number to be allocated to the logical disk Specify disk name There are the following two methods to specify a disk name 10400422 002 02 2013 Specify a disk name based on the BV name in the following format logical disk name to which generations are added_SV logical disk number When the specified disk name exceeds 16 characters the dialog box to select the portion to be used is displayed Specify an arbitrary name by adding a logical disk number to the specified prefix The logical disk name must be unique within the system no other logical disk must have the same name The OS type is the same as that of the base volume and does not need to be specified The logical disk name can be changed later by selecting the Logical Disk Logical Disk Management Change Settings When naming a logical disk make sure that the name conforms to the following rules A nonconforming name cannot be set e Length of the namel to 24 characters e Specifiable characters Alphabetical letters A to Z a to z Case sensitive Numbers 0 to 9 Under bar _ Slash All characters must be 1 byte in size If the attempt to name the logical disk at the time of binding fails a
164. ding and deleting of disk array connected by Replication and Mirroring If the disk array configures Replication and Mirroring and the above configurations are changed in the remote side disk array be sure to update the volume list as well Change of Server Configuration e Adding change and deleting of partition e Adding change and deleting of mount point set to the volume drive letter or NTFS folder name e Adding deleting and change of control volume definition only when the control volume is used e Change of connection configuration path between the disk array and server Updating Volume List To update a volume list execute the iSMvollist command with the cr option specified or execute the Create Update Volume List operation in the Volume List Display screen screen operation The user must belong to the Administrators group to update a volume list When updating a volume list note the following points so that the information to be registered in the volume list including the logical disk and volume information already registered is complete Update a volume list in the following states e The path between the disk array and the server is normally connected e The logical disk in the disk array is recognized as a server OS disk device e The volume partitions in the disk is recognized by the server OS Especially in the server connected to the LV the LV may not be recognized by the server OS when the ser
165. displayed iSM11184 Snapshot LD doesn t exist Displaying the Detailed Snapshot Information About a Logical Disk When the sln option is specified the command displays the detailed snapshot information about the specified logical disk iSMview sin Storage001 0001h Snapshot LD Detail Information LDN h gt 0001 OS Type NX LD Name Snap_BV0001 LD Capacity 11 5GB Snapshot Attribute BV Node No h 00 PD Type FC Snapshot LD List LDN h OS Type LDName Snapshot Attribute Node No h 0002 NX LD00002 SV 00 0003 NX LD00003 LV 00 Figure 5 117 Detail Information 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 115 SnapSAN 3000 S5000 Snapshot User Guide Displaying Snapshot Information Each item is explained below G Smapshot LD Detail Information LDN Displays the LD number OS Type Displays the OS typa ofeach LD from the disk amay LD Capacity Displays the LD capacity Snapshot Attribute Displays the smapshot volume attribue BV Basevolume volume from which a snapshot is copied SV Snapshot volume volume storing the information used to manage differences in the BV at specific point of time LV Link volume virtual volume linked witha BV or SV to allow indirect access sye One type of snapshot volume that does not have the information usai to manage differences in the BV PD Type Displays either of the following as the type of the PD configuring the LD Fe
166. dy 6 1 0 0000h Pooloo00 Tni ip oo06h 2000003013842ABE0006 Ready 6 1 0 0000h Poolooo0 B p 0007h 2000003013842ABE0007 Ready 6 1 0 0000h Poolo000 Ontiiitir W coosh 2000003013842ABE0008 Ready 6 1 0 0000h Poolo000 Replication fig 0009h 2000003013842ABE0009 Ready 6 1 0 0000h Pool0o00 Snapshot i oo0ah 2000003013842ABE000A Ready 6 1 0 0000h Pooloo00 Piui HA 000bh 2000003013842ABE0008 Ready 6 1 0 0000h Pooloo00 P o00ch 2000003013842ABE000C Ready 6 1 0 0000h Poold000 Log Collection ip o00dh 2000003013842ABE000D Ready 6 1 0 0000h Pooloo00 p 000eh 2000003013842ABE000E Ready 6 1 0 0000h Poold000 Screen Settings tp ooofh 2000003013842ABE000F Ready 6 1 0 0000h Pooloo00 jj ip 0010h 2000003013842ABE0010 Ready 6 1 0 0000h Poold000 Login Logout a Wp oorh 2000003013842ABE0011 Ready 6 1 0 0000h Poolooo0 p 0012h 2000003013842ABE0012 Ready 6 1 0 0000h Pool0000 w 0013h 2000003013842ABE0013 Ready 6 1 0 0000h Poold000 p oorh 2000003013842ABE0014 Ready 6 1 0 0000h Poolo000 P 0015h 2000003013842ABE0015 Ready 6 1 0 0000h Pooloo00 p oo16eh 2000003013842ABE0016 Ready 6 1 0 0000h Pool0000 m ees E ee cur te J G pr Type Date amp Time Pr Name Message Number Message Text Info Tue Mar 8 00 42 57 2011 ism99001 Connected to iSM server Server 192 168 1 36 Port 8020 User i5M3 Client WebCL viuh server scorage croup user acminisuracor Internet Protected Mode On fay Rw v Figure 5 114 SnapSAN Manager Client 184 Status iS
167. e EW Snapshot Figure 4 2 WORM without Snapshot Function Data Restoration with Use of Snapshot Function Logical Fault When a logical fault occurs due to an operation error by the user or AP abort it is possible to recover BV by restoring the created snapshot to BV In this section assuming that a logical error occurs in the BV data file the steps to recover data using a snapshot is described Determine the snapshot to be restored by referencing the information such as the creation time using the snapshot display function In addition it is assumed that the following information is given to each volume e BV Logical disk name bv001 drive letter G e SV Logical disk name sv001_01 e LV Logical disk name lv001 drive letter H 10400422 002 02 2013 2013 Overland Storage Inc 44 6 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault 10400422 002 02 2013 1 LAN Application Serv er Business Volume Snapshot Figure 4 3 WORM with Snapshot Function Work flow of business volume data recovery logic fault example lt Application server gt T Step 1 Terminating applications I 1 i 1 I Backup server Step 2 Flushing BY file system Step 3 Unmowting BY 4 i Step 4 Restoration Step 6 Restarting applications Waiting for restoration completion Figure 4 4 Business Volume Data Recovery Terminating
168. e Advanced button Opens the advanced settings screen Set button Displays the following confirmation dialog box v Is it OK to suspend monitoring of the disk array to start Snapshot Deserve Ares Pind Yer E Figure 5 33 Confirmation Clicking Yes starts binding a snapshot reserve area The Completion screen is displayed when the processing completes Back button Returns to the Snapshot Reserve Area Bind screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends Advanced Settings Figure 5 34 Advanced Settings In this screen the detailed settings for a logical disk to bind are specified Specify a threshold by the ratio or capacity Specify the threshold for the snapshot reserve area as follows e Ratio Specify the threshold as the ratio to the snapshot reserve area capacity e Capacity Specify the threshold as the capacity of the snapshot reserve area 10400422 002 02 2013 2013 Overland Storage Inc 45 46 SnapSAN 3000 S5000 Snapshot User Guide When the snapshot usage exceeds the specified threshold a warning is issued to iSM Logical Disk Number Specify the disk number for the snapshot reserve area A free number after the displayed number is allocated Logical Disk Name Specify a snapshot reserve area name The logical disk name must be unique within the disk array no other log
169. e command the volume specification that uses a physical disk number is not supported If the physical disk number has changed causing inconsistency between the state of the system device and volume list information re create the volume list On Windows Server 2003 use the MOUNTVOL command provided by the operating system at system startup to disable automatic volume mounting MOUNTVOL N before operation VERITAS VxVM is not supported Note the following when unmounting LV by the iSMrc_umount command or when unmounting a volume using the offline option 2013 Overland Storage Inc lt 4A 9 SnapSAN 3000 S5000 Snapshot User Guide Snapshot and Data Consistency e On Windows 2000 Server the disk after unmount operation becomes Not Ready Accordingly when a volume in a multi partition configuration is unmounted all volumes partitions on the relevant disk cannot be read nor written After that another partition on the same disk cannot be accessed to read or write or be flushed by the iSMrc_flush command until the LV is mounted by the iSMrc_mount command Therefore be careful of the operation procedures e Only one mount point drive letter or NTFS folder name needs to be set to the volume to be unmounted If no mount point or multiple mount points are set unmounting cannot be executed Therefore the volume cannot be unmounted if all mount points are deleted using the MOUNTVOL command with D option specified When multiple mou
170. e Adding change and deleting of mount point set to the volume drive letter or NTFS folder name e Adding deleting and change of control volume definition only when the control volume is used e Change of connection configuration path between the disk array and server Updating Volume List To update a volume list execute the iSMvollist command with the cr option specified or execute the Create Update Volume List operation in the Volume List Display screen screen operation The user must belong to the Administrators group to update a volume list When updating a volume list note the following points so that the information to be registered in the volume list including the logical disk and volume information already registered is complete Update a volume list in the following states e The path between the disk array and the server is normally connected e The logical disk in the disk array is recognized as a server OS disk device e The volume partitions in the disk is recognized by the server OS Especially in the server connected to the LV the LV may not be recognized by the server OS when the server restarts while the LV is in the Not Ready unavailable for read or write state In such a case it is required to have the OS recognize the LV again When you add delete or change the control volume definition in the disk array in which the control volume attribute cannot be identified execute the following operation
171. e Change Base volume Access Mode Change Execution Result Unexecutable Information BY Mode BV Number BY 0S Type UN Not Ready 0000h Please execute only when base volume access mode f Change base volume access mode to R W Permit cannot be returned to R W Permit by host Choose volume which you want to execute from list then click Execute button Figure 5 71 Base volume Access Mode Change Selected Volume List This part of the screen displays a list of information about the base volume selected from the base volume unit list in the information list display area If Unexecutable is shown in the Execution Result field the volume does not meet the execution conditions and therefore cannot be selected If there is any unexecutable volume refer to the Unexecutable Information and take one of the following actions 10400422 002 02 2013 2013 Overland Storage Inc 45 74 SnapSAN 3000 S5000 Snapshot User Guide Unexecutable Information Action The base volume is connected to a link volume BV Connecting Unnecessary to execute R W Permit Access mode of a base volume is already R W Permit Monitoring Suspended Retry after restarting the monitoring of the disk array Freezing Retry after defreezing the replication function This operation cannot be executed during the replication Replication Operating operation This operation cannot be executed because a restore fault Restore fault oc
172. e a link is released the SV signature is saved in LV and it is restored to the SV original signature Snapshot Access Restriction Selection When you create delete or restore a snapshot access restriction to BV is not changed but Read Write RW remains effective If however a link from LV to BV is set access can be made only via LV during link setting To use SV you need to set a link from LV At this time you can select Read Write RW or Read Only RO but usually use Read Write RW If Read Only RO is set operations vary depending on which the operating system and file system you use Do not use Read Only RO unless you are familiar with the operating system and file system operations You can set a link to SV only while a snapshot is activated snap active 10400422 002 02 2013 2013 Overland Storage Inc lt 4A 3 SnapSAN 3000 S5000 Snapshot User Guide Snapshot and Data Consistency Access Restriction Description Status Snap Active Read Write R W Read Write enabled v Read Only RO Read only enabled v Not Ready NR Read Write disabled v Not Available NA Not recognized by the v operating system or the LU Logical Unit invalid v Available v Available with administrative restrictions snap active Activating snapshot RW Read Write RO Read Only NR Not Ready NA Not Available When Read Only RO is set at a link setting e If NTFS is used as a file system reference to the desti
173. e definition and software operation setting In cluster environment use the iSMrc_signature command for all the disks that are to be snapshot target disks of the operating system in order to get and save export the disk signature information and import the information in the standby system Snapshot target disks are disks with the disk signature already written If disk signature information such as cluster failover is lost it can be restored In a cluster system the LV that moved into the Not Ready state at execution of Snapshot or link operation needs to be recognized as a faulty disk Executing the iSMrc_umount command to unmount a shared disk of MSCS Microsoft Cluster Server may cause failover Therefore do not execute Unmount for the shared disk To obtain the static point of data at creation of snapshot stop the application and then execute the iSMrc_flush command to flush the disk and wait for completion of delayed updating Before executing Restore make the shared disk offline and unmount the disk while the MSCS service is in stopped state If the snapshot function is used in a system configuration including MSCS Microsoft Cluster Server you can use BV asa shared disk but not SV LV You cannot place a quorum disk of MSCS on BV either as a static point cannot be obtained A physical disk number may be changed by the SCSI device driver s Plug and Play function during system operation Therefore except for the iSMrc_signatur
174. e not connected to any SV Connecting link volume The snapshot is being restored from the snapshot volume of BV Restoring some other pair Retry after restoration is completed SV Deleting by other pair The snapshot volume is being deleted by some other pair Retry after deletion is completed Monitoring Suspended Retry after restarting the monitoring of the disk array Freezing Retry after defreezing the replication function This operation cannot be executed because a restore fault Restore fault occurred in the target base volume This operation cannot be executed because a snapshot SV fault fault occurred in the target base volume Execute the operation for a snapshot volume whose SV Preparing snapshot state is active SV Prepare Fault Summary Details Execute the operation for a snapshot volume whose snapshot state is active Clicking the Execute button displays the following confirmation dialog 08227 Snapshot deletion will be executed The snapshot is deleted which is already created Will you execute Figure 5 80 Confirmation Clicking the Yes button displays the following dialog indicating the system is during processing 10400422 002 02 2013 2013 Overland Storage Inc lt 5 81 SnapSAN 3000 S5000 Snapshot User Guide Processing Figure 5 81 Processing The processing dialog displays information of the snapshot volume currently during processing Clicking the Cance
175. e of the logical disk name input field is a character string consisting of pool name_SDV logical disk number This default value is used when you are not changing the logical disk name Example Pool0000_SDV0011 Pool00OO_SDV0012 etc No OS Type can be specified for the snapshot data volume In that case the field is blank The logical disk name can be changed later by selecting the Logical Disk Logical Disk Management Change Settings 2013 Overland Storage Inc 45 38 SnapSAN 3000 S5000 Snapshot User Guide When naming a logical disk make sure that the name conforms to the following rules A nonconforming name cannot be set e Length of the name 1 to 24 characters e Specifiable characters Alphabetical letters A to Z a to z Case sensitive Numbers 0 to 9 Under bar _ Slash All characters must be 1 byte in size Completion Gy Mapshot Deserve Ares Bind gt Confirmation gt Completion v Snapshot reserve area binding succeeded Click a following link if necessary Figure 5 25 Reserve Binding Succeeded The snapshot reserve area binding result is displayed When the processing succeeded the following link is displayed e Add generation Opens the Generation Addition screen Finish button Returns to the monitoring screen Snapshot reserve area capacity e When the snapshot reserve area is bound the management area is added to the specified capacity The value of the snapshot rese
176. e signature information to the specified file e Importing signature from a file import Reads and registers the signature information recorded in the specified file Displayed Information The following information is displayed in the signature information list of the iSMrc_signature command Displayed information Disk Map Disk Saved LV Link Disk Array Name No LDN Signature SignatureSignature Attribute Status disk_array_namej dskn kin map_sig disk_sig saved_sig attribute link_status Description disk_array_name Disk array name dskn Physical disk number ldn Logical disk number in hexadecimal map_sig Reads and displays signature information saved in the map file by the read option disk_sig Displays signature information read from the physical disk directly saved_sig Displays signature information saved in the disk array attribute Displays the logical disk attribute link_status Displays the link state when the target physical disk is the link volume LV used for the snapshot function Displays hyphen unless the target is a link volume e linkConnected e unlinkUnconnected 10400422 002 02 2013 2013 Overland Storage Inc lt 4 6 77 SnapSAN S3000 S5000 Compliance WORM User Guide Execution Conditions To perform Disk Signature operation the following conditions must be satisfied e A disk signature value reported by the iSMrc_signature command and a disk signature value reported by Windows or
177. e status is restoring BV Mode Displays the access restriction of the base volume When the access restriction cannot be returned to R W Permit from the operating host perform Base volume Access Mode Change operation to return to R W Permit Display Description R W Permit Indicates the volume can be read and written from the operating host Not Ready Indicates the volume cannot be operated from the operating host Capacity GB Displays the capacity of the logical disk Partition Name Displays the name of partition to which the base volume belongs This column is not displayed for disk arrays for which VirtualStoragePartitioning has not been purchased SV Pool Number Displays the number of the pool to which the snapshot volume set in the base volume belongs in hexadecimal 10400422 002 02 2013 2013 Overland Storage Inc 45 18 SnapSAN 3000 S5000 Snapshot User Guide SV Pool Name Displays the name of the pool to which the snapshot volume set in the base volume belongs SV PD Type Displays the physical disk type configuring the pool to which the snapshot volume set in the base volume belongs Display Description FC Indicates an FC disk ATA Indicates an ATA disk SAS SED Indicates a SAS SED disk NLSAS Indicates an NLSAS disk LV Number Displays the logical disk number of the link volume in hexadecimal This item is shown when there is a volume link LV OS Type Indicates the OS type o
178. e target snapshot volume is not connected to a link volume e When the derived generation is deleted no generation of snapshot volume newer than the target snapshot volume is guarded e The target base volume is not being restored e The target base volume is not connected to a link volume e No other snapshot volume set in the target base volume is being deleted e No other snapshot volume set in the target base volume is connected to a link volume e The disk array is being monitored e The disk array is not in the freeze state e Ifthe target base volume is also used as MV the activity state of the pair is Separate however not or Separate Preparing or Separating sep exec e Ifthe target base volume is also used as RV the activity state of the pair is Separate however not separate execution sep exec e The update prevention state of the target base volume is not Prevent e Ifthe state of the target base volume is the restore fault the state of target snapshot volume is Restore suspended e The state of the target base volume is not snapshot fault e Data of the target base volume is not being migrated by the Data Migration function To execute snapshot restoration the base volume needs to be unmounted from the host The snapshot restoration operation starts the restoration process The execution dialog indicates that the restoration process has started and that the snapshot volume is in the restore preparing or resto
179. e volume is automatically deleted The disk of the LV SV is changed to Not Ready iSMrc_umount mvol Volume 37d84cca 2507 11d5 a0 7 00004c714491 14 Releasing a link between LV and SV backup server After unmounting release a link between LV and SV iSMsc_unlink lv 1v001 lvflg ld 2013 Overland Storage Inc 44 5 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault 15 Canceling SV guard backup server Cancel SV guard classification set in Step 6 iSMsc_svguard bv bv001 bvflg ld sv 1 svflg relgen mode cancel When you restart the backup server in the state just after performing Canceling SV guard backup server you need to follow the Start of Sever Connected to SV LV operations and return the backup server into normal operation Restoring Business Volume Data This section describes procedures of restoring business volume BV data Data Restoration without Use of Snapshot Function When restoring data via network or restoring data on business volume BV directly from backup data on the tape execute data restoration in the procedure specific to the backup software However when a snapshot for BV to be restored has been created be sure to delete the snapshot before restoration Applic ation Serv er Restore data on zg Restore business volume business volume BY data directly using Eo m BY via network Fn backup data on tape gna ow ae erie D Business Volum
180. ea Message display area Figure 5 3 Display Area Descriptions SnapSAN Manager Configuration Setting Screen The SnapSAN Manager configuration setting screen provides the following functions e Function for setting the disk array configuration when initially introducing the disk array e Function for setting the disk array configuration when installing additional physical disks e Logical disk maintenance and management functions e Cache segmentation and other expansion functions Also the SnapSAN Manager configuration setting screen provides the following snapshot related operation and information display functions e SV allocation and unbinding e LV binding unbinding link permission setting e SRA binding unbinding capacity threshold setting e BV SV LV and SRA configuration information display 10400422 002 02 2013 2013 Overland Storage Inc 45 3 SnapSAN 3000 S5000 Snapshot User Guide iSM Client Win GUI iSMClient Web GUI hostname State StorageS2900 Disk Array Teforawcson Page Array Wane Scenaqea2500 Operation Mate Pook coneigunan ioe intonasie and pareu hanes of Poole D egonra Pome egener an Figure 5 4 SnapSAN Manager Configuration Setting SnapSAN Manager Snapshot Management Screen The SnapSAN Manager snapshot management screen provides the functions for operating snapshot and displaying information using the SnapSAN Manager client
181. ea or configuration display area Then from the menu bar of the snapshot management screen select Operation Snapshot Operation Snapshot Cyclic Creation e Select a base volume from the information list display area or configuration display area Then right click on the mouse and select Snapshot Cyclic Creation Snapshot Cyclic Creation When the snapshot is created by object snapshot volume it is created after deletion Choose volume which you want to execute from list then click Execute button It is possible that multiple volumes are chosen and executed cue me Figure 5 65 Snapshot Cyclic Creation Screen From the list select the base volume for which you want to create a snapshot and then click the Execute button You can specify two or more volumes at a time and execute the operation for all of them simultaneously Unexecutable volumes cannot be selected Selected Volume List This part of the screen displays a list of information about the base volume selected from the information list display area or configuration display area as well as the snapshot volume for which snapshot is to be created If Unexecutable is shown in the Execution Result field the volume does not meet the execution conditions and therefore cannot be selected If there is any unexecutable volume refer to the Unexecutable Information and take one of the following actions Unexecutable Information Action
182. ecessary to execute the following Example Sharing of shared folder NET SHARE share_name drive_letter path To enable the sharing of the folder bv_folder1 specify as shown below NET SHARE by_folder1 G bv_folder1 Example of Secondary Use of Snapshots This section describes how to build the same environment as that used for actual operations using snapshots The snapshot of the volume BV used for operations and updated daily is created regularly for example once a day The snapshot where data for the necessary point of time is saved is accessed from a test operation via LV It is assumed that LV for access from SV the 7th generation and a backup server has been constructed for the volume and operation has been started It is also assumed that the following information is given to each volume e BV Logical disk name bv001 drive letter G e SV Logical disk name sv001_01 to sv001_07 e LV Logical disk name lv001 drive letter H 10400422 002 02 2013 2013 Overland Storage Inc 44 12 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault Figure 4 7 Secondary Use Snapshots Work flow of secondary use of snapshots example lt Application server gt lt Test server gt Terminating app lic atio ns Step 2 1 Setting a link between LY and SY Step 2 2 Mounting LY SV Step 2 3 Accessing a snapshot Unmounting BY Creating a snapshot Step 2 4 Flushing LY S
183. ecome the Base Volume BV Logical disks that meet any of the following conditions are not displayed in the volume list e The snapshot type is SV LV SDV or SV e CV Control Volume Logical disks that meet any of the following conditions cannot be selected Condition Description Has Max Generations The number of generations is 16 maximum number The logical disk capacity exceeds the capacity limitation Exceeds Capacity Limit The capacity limitation is 10 TB 10240 GB Abnormal Snapshot State A BV in the snapshot fault state Abnormal Restore State A BV in the restore fault state Linked Diskarray Unsupport MV RV or RV MV that does not has the snapshot link function for MV ATGroup Registered in an ATgroup Reserved Belongs to a reserve group Data Protection Data protection was set Being reinitialized because the protection for the volume are released by During Reinit the WORM function Locked Configuration change is locked Pd Rotation Stop A disk in the rotation stop state by the eco mode A pool to be used by thin provisioning function which was bound on a disk Thin Provisioning array that does not support the snapshot function To check the conditions above information on the link disk array is needed If this information cannot be obtained no generation can be added Select the area for creating a snapshot from the list Specify the area pool in which snapshot are created Only
184. ed SV auto delete mode the SVs of which creation time is later than that of the restoration source SV are deleted At this time the generation attribute of the restoration source SV is still Derived and 1 is given as the generation number When restoration is executed in the derived SV keep mode the snapshots of which creation time is later than that of the restoration source SV become derived SVs The generation attribute is still Derived and is given as the generation number The generation attribute of the restoration source SV is still Derived and 1 is given as the generation number Derived generation generation number Figure 3 5 Derived Generation of Snapshot Derived SV Generation Number at Snapshot Creation When a snapshot is recreated using the SV of which generation attribute becomes Derived a snapshot of which generation attribute is Normal is created At this time 1 2 3 is given to the generation number in the creation time order from the latest snapshot All created snapshots including snapshots with the derived generation and normal generation are subjects 10400422 002 02 2013 2013 Overland Storage Inc 43 6 SnapSAN 3000 S5000 Snapshot User Guide Restoration from SW 3 Anew snapshot is The generation numbers SV l and SV 2 later created using SV 2 1 of derived SVs and i than SV 3 become I The generation attribute normal SVs are derived
185. ed below Double clicking an item displays the Connection screen Type Indicates the volume type LV Number Displays the logical disk number of the link volume in hexadecimal 10400422 002 02 2013 2013 Overland Storage Inc 45 25 SnapSAN 3000 S5000 Snapshot User Guide LV OS Type Indicates the OS type of the link volume For information about the displayed type refer to iii BV OS Type in 8 Base volume list LV Logical Disk Name Displays the logical disk name of the link volume Partition Name Displays the name of partition to which the link volume belongs This column is not displayed for disk arrays for which VirtualStoragePartitioning has not been purchased DV Number Displays the logical disk number of the destination volume DV in hexadecimal This item is shown when there is a volume link DV OS Type Indicates the OS type of the destination volume DV This item is shown when there is a volume link DV Logical Disk Name Displays the logical disk name of the destination volume DV This item is shown when there is a volume link LV Mode Displays the access restriction of the link volume This item is shown when there is a volume link Display Description Indicates the volume can be read and written from the R W Permit operating host Indicates the volume can only be read from the operating Read Only host Indicates the volume cannot be operated from the operating Not Ready hos
186. ed from an external device You need to pay attention to that especially if you set a link to BV When a link is set the destination volume is put to Not Ready and cannot be accessed directly Figure 3 15 Setting a Link To set a link the following conditions need to be satisfied e The volume where a link is to be set is registered in the link control list in advance 10400422 002 02 2013 2013 Overland Storage Inc 43 15 SnapSAN 3000 S5000 Snapshot User Guide e The logical disk capacity and use format of the specified LV match those of the link destination volume e A link is not set between the specified LV and other volumes e Ifthe specified destination volume is SV the activity state of the SV is in the snapshot active state e A link is not set to the specified destination volume e The specified destination volume is BV or SV e Ifpair setting is made to the BV to be operated as replication MV the replication state is not Replicate Preparing Restore Preparing or Separate Preparing e Ifthe specified link destination volume is set in a pair as replication RV the replication state is the separated state e Ifthe specified link destination volume is BV BV is not Snapshot Restoring or Snapshot Restore Preparing e Ifthe specified link destination volume is BV BV is not the update prevention state e The disk array storing the target volume is not in the freeze state Unlinking This function unlinks B
187. ed to the specified capacity e The value of the snapshot reserve area capacity is a certain percentage of the target base volume multiplied by the number of generations Example When assuming 30 Base volume capacity10 GB Number of snapshot generations4 SRA capacity10 GB x 30 x 4 generations 12 GB e The snapshot reserve area can be expanded after binding free pool space is required Adding a Snapshot Generation The work of adding a snapshot generation is done using the Generation Addition screen in the wizard format as follows Generation Addition A volume to which snapshot generations are added is selected Confirmation Snapshot data volumes to bind are displayed Check whether the settings are correct Advanced Click this button to make detailed snapshot volume settings Completion The generation addition result is displayed Generation Addition je Ceneration Addition Generation Addition gt Comfirmation gt Completion 0000h 20000009910100100000 10 0 osoin 20000007910100100001 10 0 the Cancer Help Figure 5 36 Adding Snapshot Generation Wizard 10400422 002 02 2013 2013 Overland Storage Inc 45 48 SnapSAN 3000 S5000 Snapshot User Guide Select volumes to add generations form the volume list Select volumes to which snapshot generations are added from the list Adding a snapshot generation to a volume that does not have any snapshot generation causes that volume to b
188. eleted The disk of the LV BV is changed to Not Ready iSMrc_umount drv H 2013 Overland Storage Inc lt 4 4 11 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault 9 Releasing a link between LV and BV backup server After unmounting is completed release a link between LV and BV iSMsc_unlink lv 1v001 lvflg ld 10 Mounting BV application server Use BV again as a business volume Mount BV to associate with a file system iSMrc_mount mvol Volume 61563686 b385 11d7 a349 806d6172696 drv G Mounting when the offline option is specified in the iSMrc_umount command In Step 3 Unmounting BV the offline option is specified in the unmount command When the offline option is specified in the unmount command the drive letter is deleted Therefore check the volume list at mounting and execute mounting using the former drive letter 11 Restarting applications application server Restart the applications and services that were terminated in Step 1 If services were halted in Step 1 restart the services by the following procedures If services were not halted in Step 1 it is not necessary to execute the following Example Starting service NET START service name To start the service ESMCommonService specify as shown below NET START ESMCommonService If sharing of the folder was cancelled in Step 1 specify the sharing again If sharing was not cancelled in Step 1 it is not n
189. er Main Window SnapSAN Manager Configuration Setting SnapSAN Manager Snapshot Management iSMview e SV allocation and unbinding v e LV binding unbinding link permission setting v e SRA binding unbinding capacity threshold setting v Snapshot link operations e Snapshot creation deletion and restoration v e Link setting and unlinking y Snapshot link information display Snapshot information display v v v v e Link information display v v v v v v v v e SRA information display SnapSAN Manager Main Window The SnapSAN Manager main window is the first window that appears when you connect the SnapSAN Manager client to the SnapSAN Manager server Figure 3 2 It displays the information about the configuration of the disk arrays monitored by SnapSAN Manager and the states of the resources You can start the screen of the relevant functions such as the configuration setting screen and snapshot screen from the menus on the SnapSAN Manager main window The SnapSAN Manager main window displays the following snapshot related information 10400422 002 02 2013 Snapshot configuration information Volume link configuration information SRA configuration information 2013 Overland Storage Inc 45 2 SnapSAN 3000 S5000 Snapshot User Guide Configuration information Message display area Configuration information list display ar
190. eration linked with operations be sure to install SnapControl to each server and perform operation linked with operations of each server because operation of a file system needs to be performed on the application server and the backup server and data consistency needs to be secured To perform snapshot operation the state monitoring information of the disk array held by the SnapSAN Manager needs to be in the latest state Therefore set a short update time interval of the state monitoring information held by the SnapSAN Manager or use the cr option of the iSMrc_ldlist command to update the information of the disk array and logical disk for operation For how to specify the environment settings such as update time interval of state monitoring information held by the SnapSAN Manager refer to the User s Manual in accordance with your OS in use When the partitioning function VirtualStoragePartitioning is used operations linked with the SnapSAN Manager are executed under the same authority with the storage group user user role administrator Volume Types Types of volumes that are specified as operation targets for snapshot commands are as follows Type Description Identifier Target System Windows UNIX Logical disk name Specifies a logical disk name set on the disk Id v v array side Mount point volume Specifies a mount point volume name assigned mvol v name to the volume by the system NTFS folder name Speci
191. erland Storage Inc lt 4 6 30 SnapSAN S3000 S5000 Compliance WORM User Guide Clicking the OK button returns to the Volume List Display screen File Example The following example shows the CSV file that is output as the result of the CSV output of the information display list Drive Letter Path Name Volume Name Physical Disk No Volume Definition LUN LDN LD Name Disk Array Type PD Type Target Name Pair disk Destination volume Wolume cce89866 4d87 1 1d8 92a3 806d617 2696F disk1 control 000h 002ah BACKUP_C V Tokyo_Customer_DataBase IV FC iqn 2001 03 jp nec storage01 ist 3 10 sn 0000000010000028 Ix expr120a4 target0000 W Volume cce89867 4d87 1 1d8 92a3 806d61 7 2696F disk2 001h 0020h LOCAL_DATA1 T okyo_Customer_DataBase lV FC Volume cce89868 4d87 1 1d8 92a3 806d61 7 2696F disk3 002h 0021h LOCAL_DATA2 T okyo_Customer_DataBase lV FC E Volume cce89869 4d87 1 1d8 92a3 806d6 17 2696f disk4 003h 0022h DB_DATA_LV T okyo_Customer_DataBase LV FC F Volume cce8986a 4d87 1 1d8 92a3 806d6172696f disk5 004h 0023h DB_REDO1_LV Tokyo_Customer_DataBase LV FC G Volume cce8986b 4d87 1 1d8 92a3 806d6 1726 96f disk6 005h 0024h DB_REDO2_LV Tokyo_Customer_DataBase LV FC H Volume cce8986c 4d87 11d8 92a3 806d6 17 2696f disk7 006h 0025h DB_CTL_LV To kyo_Customer_DataBase LV FC I WVolume cce8986d 4d87 1 1d8 92a3 806d6172696F disk8 007h 0026h DB_ARCHIVE_L V Tokyo_Cu
192. error message is displayed e The snapshot volume capacity cannot be expanded e Ifthe attribute of a snapshot volume is SV after a binding attempt it indicates that the binding of a snapshot has failed for some reason Confirmation dy Coneration Addition eS Ge Gee Figure 5 37 Generation Addition Confirmed This screen is to confirm the generation addition Check whether the displayed settings about snapshot volumes to bind are correct Advanced button Opens the advanced settings screen Set button Displays the following confirmation dialog box 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 50 SnapSAN 3000 S5000 Snapshot User Guide wo ws cerns acina ot te isn emer onary Speen paani intent tes o Figure 5 38 Confirmation Dialog Box Clicking Yes starts binding a snapshot volume The Completion screen is displayed when the processing completes Back button Returns to the Generation Addition screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends Advanced Settings Figure 5 39 Advanced Settings to Bind In this screen the detailed settings for a snapshot volume to bind are specified Starting Logical Disk Number Specifies the number to be allocated to the logical disk Specify disk name There are the following two methods to specify a disk name
193. essing O3a7h CX SC_BV Figure 5 67 Processing Dialog The Processing dialog displays information for the base volume currently being processed Clicking the Cancel button displays the following dialog From this dialog you can suspend cyclic snapshot creation and return to the Snapshot Management screen for other operations You can also check the object snapshot state of the selected base volume from the information list display area of the Snapshot Management screen J 08422 cyclic creation operation was canceled during the process Snapshot The state of selected object snapshots can be checked by the snapshot screen Figure 5 68 Cancellation Message Dialog 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 72 SnapSAN 3000 S5000 Snapshot User Guide If the object snapshot volume is changed during processing the following confirmation dialog appears 08622 Since the state of a disk array was updated object snapshot volume was changed The snapshot to base volumne O000h WIN DESvr01 is created in snapshot volume O00fh WN 08Sw101_SVOOOF R is deleted when the snapshot is already created Wil you execute Figure 5 69 Snapshot Volume Change Confirmation P 08601 s7 Is processing continued to the volume of a selection state Figure 5 70 Continue Confirmation Selecting No stops the processing Execution Conditions To execute the snapshot cyclic creation oper
194. f the base volume only 08244 Since it links to base volume does it change to the display of only base volume 4 link setting to base volume is restricted to the repair of base volume Figure 5 94 Link Setting Confirmation A link to the base volume can be set up only when the base volume needs to be repaired in case of a physical failure Under normal circumstances it is unnecessary to set up a link to the base volume Specific Access Mode Specify the access restriction of the link volume Display Description The volume can be read and written from the operating R W Permit host Read Only The volume can only be read from the operating host The volume is in the Not Ready state and cannot be Not Ready operated from the operating host Not Available The volume cannot be accessed from a business host If a snapshot volume is specified as the destination volume clicking the Execute button displays the following confirmation dialog K 08600 s7 will you execute Figure 5 95 Destination Confirmation If the base volume is specified as the destination volume clicking the Execute button displays the following confirmation dialog 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 92 SnapSAN 3000 S5000 Snapshot User Guide 08641 Will you execute Has base volume of destination volume been un mounted from the host Figure 5 96 Base Volume Destination Execution Conditions To
195. f the link volume This item is shown when there is a volume link LV Logical Disk Name Displays the logical disk name of the link volume This item is shown when there is a volume link LV Mode Displays the access restriction of the link volume This item is shown when there is a volume link Display Description Indicates the volume can be read and written from the R W Permit operating host Read Only Indicates the volume can only be read from the operating host Indicates the volume cannot be operated from the operating Not Ready host Not Available Indicates the volume cannot be operated from any host Base volume unit list snapshot volume The snapshot volume display area of the base volume unit list displays the information about the items described below Double clicking an item displays the Connection screen Type Indicates the volume type 10400422 002 02 2013 2013 Overland Storage Inc 45 19 SnapSAN 3000 S5000 Snapshot User Guide Icon Description Indicates a snapshot volume SV KS If the snapshot is released the icon changes to B If a snapshot fault or SV prepare fault occurred the icon changes to Q SV Number Displays the logical disk number of the snapshot volume in hexadecimal SV OS Type Indicates the OS type of the snapshot volume SV Logical Disk Name Displays the logical disk name of the snapshot volume Status Displays the status of the snapshot Display Descr
196. fied BV is not being deleted restored or prepared for restoration In the derived SV auto delete mode no protected SV exists in any generation newer than the one of the target SV The target BV is unlinked The target SV is not linked with the LV 2013 Overland Storage Inc 46 46 SnapSAN S3000 S5000 Compliance WORM User Guide The BV is unmounted from the host UNIX system The SV is not linked with any other LV The BV is not in the update prevention state If the target BV is paired as a volume for replication MV or RV replication state is not in the Separated state Data of the target BV is not being migrated that is the target BV is neither a source nor destination volume for the data migration The disk array storing the target volume is not in the freeze state The target volume is not a dynamic disk volume Windows system The following notes do not apply to joint operation with SnapSAN Manager The target BV is registered in the volume list If the target BV is not registered in the volume list the following conditions must be satisfied e The LV linked to the target BV is registered in the volume list e Ifthe target BV is paired as the RV for replication the MV paired with the RV is registered in the volume list The volume list is not being created When specifying the combination of a volume group or a disk group with a logical disk name specify the same number of logical volumes as those
197. fies an NTFS folder name path name for mdir v the volume Drive letter Specifies a drive letter for the volume drv v Special file name Specifies a special file name assigned to the disk sfn v logical disk by the system Volume group name Specifies a name of the LVM s volume group that vg v includes the disk logical disk Disk group name Specifies a name of the VxVM s disk group that dg v includes the disk logical disk Specifies a number that is assigned in relgen v v Relative generation descending order as in 2 3 4 etc relative to name the latest generation 1 to identify an SV corresponding to a BV Specified when the snapshot of the oldest cyclic v v Cyclic generation generation is deleted as a new snapshot is created 10400422 002 02 2013 2013 Overland Storage Inc 46 8 SnapSAN S3000 S5000 Compliance WORM User Guide Type Description Identifier Target System Windows UNIX Indicates that the SV to be deleted is auto v v Deleted SV auto automatically selected when a snapshot is selection deleted Specified at the batch deletion of snapshots in all all v v SV batch operation Operation Vol generations when a snapshot is deleted Alternatively specified to cancel all SV guard classifications under a BV together ume Setting File To perform batch processing of multiple snapshots using a snapshot operation command or to operate a specific snapshot using multiple commands use
198. figuration display area the state of each managed item is indicated by the shape of the icon and the shading of the color The icon of a disk array not being monitored is shaded in gray For details on the individual icons refer to the description of the icons of the relevant information list screen Disk Array Layer This layer displays a list of disk arrays that are being monitored by SnapSAN Manager and that can use the snapshot functions as well as their states 10400422 002 02 2013 2013 Overland Storage Inc 45 5 SnapSAN 3000 S5000 Snapshot User Guide Icon SS ctc Description Indicates that the disk array is operating normally Q Indicates that the Snapshots disk capacity is insufficient Indicates that the snapshot has been released because of insufficient SRA capacity Indicates that threshold excess occurred in pool Indicates that the replication function is in the freeze state Component layer Indicates that a restore fault snapshot fault or SV prepare fault occurred This layer displays the volumes related to the snapshot operation that are classified into the following four categories e Base volume Collection of base volumes e Snapshot volume Collection of snapshot volumes e Link volume Collection of link volumes e Pool Collection of pools to which snapshot volumes belong Icon Description Represents a collection of base volumes 6 restore fault
199. firmation screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends Confirmation 10400422 002 02 2013 2013 Overland Storage Inc 45 68 SnapSAN 3000 S5000 Snapshot User Guide Gy Dewerved Aroa Unbind Snapshot Deserve Ares Unbind gt Confirmation gt Completion Snapshot date volume list haber of volumes 1 0002h P0010001 S070002 23 0 Snapshot oo10001 BATIDE When the settings are OK click Set to start unbinding the snapshot reserve ares If you want to sodify any settings click Back on a F L Cancer Hep Figure 5 62 SRA Unbind Settings Confirmation This screen is to confirm the settings about snapshot reserve area unbinding Check whether the displayed snapshot data volumes to be unbound are correct Set button Displays the following confirmation dialog box 0 1s it OK to suspend monitoring of the disk array to start Snapshot Seserve Area Unbind Figure 5 63 SRA Unbind Settings Correct Clicking Yes starts unbinding the snapshot reserve area The Completion screen is displayed when the processing completes Back button Returns to the Snapshot Reserve Area Unbind screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends 10400422 002 02 2013 2013 Overland Storage Inc 45 69
200. folder is used on the target volume cancel the sharing temporarily Example Halting service NET STOP service name When halting a service ESMCommonService specify as follows NET STOP ESMCommonService Example Canceling sharing of folder NET SHARE share_name delete When canceling the sharing of the folder bv_folder1 specify as follows NET SHARE bv_folder1 delete 10400422 002 02 2013 2013 Overland Storage Inc 44 10 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault 10400422 002 02 2013 2 Repairing BV application server When BV was rebuilt to recover from a hardware fault or when a new logical volume was created signature the disk by using Disk Management Windows Then set a partition create a file system by carrying out format and reset the drive letter For the partition file system and drive letter use settings previously specified before the fault occurred Also re create a volume list and update it iSMvollist cr 3 Unmounting BV application server Unmount BV before restoration To keep data consistency of BV and SV unmount BV and release the link between the volume and file system To execute unmounting you need to terminate all applications that access the drive To execute unmounting securely and prevent the drive from being accessed by another application be sure to execute the iSMrc_umount command with the offline option specified for unmounting Whe
201. following actions 10400422 002 02 2013 2013 Overland Storage Inc 45 76 SnapSAN 3000 S5000 Snapshot User Guide Unexecutable Information Action Snapshot Deleting Retry after snapshot deletion is completed Snapshot Restoring Retry after restoration is completed The snapshot is guarded Execute the operation for an SV Guard unguarded snapshot volume The snapshot volume is connected to a link volume Execute the operation for a snapshot volume not connected to any SV Connecting link volume SV Deleting by other pair The snapshot volume is being deleted by some other pair Retry after deletion is completed The base volume is being restored by some other pair Retry BV Restoring after restoration is completed Monitoring Suspended Retry after restarting the monitoring of the disk array Freezing Retry after defreezing the replication function Replication Operating This operation cannot be executed during the replication operation This operation cannot be executed because a restore fault Restore fault occurred in the target base volume This operation cannot be executed because a snapshot SV fault fault occurred in the target base volume The target snapshot volume is in preparation SV Preparing Reexecute the target snapshot volume after it is prepared SV Prepare Fault The target snapshot volume cannot be executed because a prepare fault occurred BV Data Being Migrated
202. g a link volume to the snapshot volume Display the Snapshot Creation screen using one of the following procedures e Select a snapshot volume from the information list display area Then from the menu bar of the snapshot management screen select Operation Snapshot Operation Snapshot Creation e Select a snapshot volume from the information list display area Then right click on the mouse and select Snapshot Creation Snapshot Creation Unexecutable Information Status sv Number sv 08 Type SV Logical ne 1 le gt i gt J DE WN VN ii Summary C Details Choose volume which you want to execute from list then click Execute button It is possible that multiple volumes are chosen and executed i Execute i Figure 5 73 Snapshot Creation From the list select the snapshot volume for which you want to create a snapshot and then click the Execute button You can specify two or more volumes at a time and execute the operation for all of them simultaneously Unexecutable volumes cannot be selected Selected Volume List This part of the screen displays a list of the information about the snapshot volume selected from the information list display area If Unexecutable is shown in the Execution Result field the volume does not meet the execution conditions and therefore cannot be selected If there is any unexecutable volume refer to the Unexecutable Information and take one of the
203. g snapshot related information e Snapshot configuration information Displays the snapshot related information for each volume e Volume link configuration information Displays the information about the connection between base volume and link volume or between snapshot volume and link volume e SRA configuration information Displays a list of snapshot data volumes in the SRA 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 112 SnapSAN 3000 S5000 Snapshot User Guide Displaying Snapshot Information SS SSS P storage Manager Windows Internet Explorer mec i a gt P OO a 8 4 x P sns e she Favorites 3 Suggested Sites Web Slice Gallery Storage Manager lt ic ied O dh Pager Safetyy Toos _ NN 3 eal ee T 153 iSM Server a ee ene a Access Control All ee oe Coateal Disk Name l Capacity Pool Number Screen Operation tv W 0000h 2000003013842ABE0000 Ready 6 2 0 0000h Pool0000 tr Fault Information wp 0001h 2000003013842ABE0001 Ready 6 1 0 0000h Poolo000 ip ooozh 2000003013842ABE0002 Ready 6 1 0 0000h Poolo000 Power Consumption F Controller p 0003h 2000003013842ABE0003 Ready 6 1 0 0000h Poold000 ERLE 9 i 0004h 2000003013842ABE0004 Ready 6 1 0 0000h Pool0000 Option ip o00sh 2000003013842ABE0005 Rea
204. garded as a comment Control Volume Registration You should have updated the volume list to reflect the setting information described in the control volume definition file After creating or updating the volume list list the control volumes by using the iSMvollist command to check that the control volume has been successfully registered in the volume list iSMvollist ctl Volume List Creation Creation of a volume list is required before using snapshot operation command A volume list is created by the iSMvollist command with the r option specified Create a volume list with the appropriate user privilege The following command line shows an example to create a volume list with the iSMvollist command iSMvollist r Upon successful creation of a volume list the following message appears iSM11100 Command has completed successfully If creation of a volume list fails execution of snapshot operation commands is disabled After troubleshooting the problem in accordance with an error message or with operation error tracing create a volume list again If the SnapSAN Manager server is running on the same server it is required to exit SnapSAN Manager before creating a volume list Create a volume list in the following states e The path between the disk array and the server is normally connected e The logical disk in the disk array is recognized as a server OS disk device e The volume in the disk is recognized by the server O
205. gical Fault and Physical Fault e SV Logical disk name sv001_01 e LV Logical disk name lv001 drive letter H Application Server Backup Server Business Volume Figure 4 1 Online Backup 10400422 002 02 2013 2013 Overland Storage Inc 44 2 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault Work flow of backup operation example lt App lication server gt Backy server Stepl Ddeing an old snapshot Step 2 Teminating applications Step 3 Flushing BY file system Sep d Unmounting BY Step 5 Creating asnapshot Step 6 Setting SV guard Step7 Mounting BY Steps Restarting applications Step 9 Setting a Ink between LV and SYV Sepl0 Mounting LV ep ll Executing backup Step 12 Flushing LY file system Sep 13 Unmounting LV Step 14 Releasing a link betwee LY and sv if i i I I i Step15 Cancdimg SV guard 1 Operation procedure 1 Deleting an old snapshot application server It may take some time to delete a snapshot depending on the differential quantity of volumes Therefore before terminating operation delete the generation for which a snapshot is to be created If you use a snapshot cyclically use the following command to delete a snapshot iSMsc_delete bv bv001 bvflg ld auto 10400422 002 02 2013 2013 Overland Storage Inc 44 3 SnapSAN 3000 S
206. h of BV and SV LV consist of multiple partitions with drives E and F assigned to BV and drives J and K assigned to SV LV Assume that you execute snapshot by specifying drive E as BV attempting to replicate only the data of drive E of BV to drive J of SV LV As the result data of drive F is also replicated overwriting SV LV drive K with data of BV drive F That is data of SV LV drive K will be lost At this time unless the disk association with the file system of SV LV drive K is cleared the file system of drive K will be placed in inconsistent state BV SV Figure A 1 Disk Containing Multiple Positions Snapshot operation using a logical disk containing multiple partitions or logical volumes is not recommended When the volume to be operated is recognized from the server operating system and can be accessed SnapControl obtains disk configuration information of that volume When the volume contains multiple partitions or logical volumes SnapControl does not allow operation by default You can perform operation for a logical disk containing multiple partitions or logical volumes by changing settings in the option setting file In this case be extremely careful about operation File System Selection You can configure a file system for the target BV and SV LV volumes for snapshot operations In addition these volumes may be used as RAW devices for Oracle etc The target BV and SV LV paired for snap
207. hat a physical fault occurs in the BV data file the steps to recover BV from a backup medium are described In addition it is also assumed that a snapshot for the BV to be recovered has been created at the necessary point of time and backed up to a backup medium at the time It is assumed that the following information is given to each volume e BV Logical disk name bv001 drive letter G e SV Logical disk name sv001_01 e LV Logical disk name lv001 drive letter H W kw to Bv ana restore BY directly Figure 4 5 Data Restoration Snapshot Function Physical Fault 10400422 002 02 2013 2013 Overland Storage Inc 44 9 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault Work flow of restoring data of the business volume physical fault example lt pplication server gt Backup serv er gt Stepl Terminating app licatio ns Step2 Repairing BY Step 3 Unmounting BY Step 4 Setting a linkb etween LY and BY Step 5 Mounting LV Restoring data fio m a backup medium to BY Step 7 Flushing LY file system Unmounting LY Releasing a link between LY and BY Step 10 Mounting BY Step 11 Restarting applications Figure 4 6 Business Volume Physical Fault 1 Terminating applications application server Terminate or halt the operations and applications that are accessing the volume where a fault has occurred If a shared
208. he Replication screen the operation menu is displayed but you cannot select any operation because no operation cannot be executed For a volume displayed as Not managed or Unpaired you cannot display the operation menu by right clicking 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 106 SnapSAN 3000 S5000 Snapshot User Guide e Since a partition user cannot execute any operations related to data replication menu for a volume displayed as No Authority the partition user cannot select the data replication operation menu However the partition user may execute operations related to snapshot and in this case the partition user can select the snapshot operation menu CSV Output of Information List Output the information currently displayed in the information list display area to a CSV file for storage From the menu bar select the following menu items e File CSV Output of Information List CSY Output of Information List Save rx O DATA 2 My Recent Documents Desktop My Nowak File pane Places Save as ype i fc SVisepaested by commal csv Figure 5 109 CSV Output CSV File Containing the Information List An example of the CSV file is shown below that is output when the CSV output of the information list is executed The information displayed on the screen is output to this file with each item separated by a comma File Example Base volume Type BV Number BV O
209. he execution result of the operation The operation cannot be performed for a volume for which Unexecutable is displayed Unexecutable Information Displays the reason why the operation cannot be executed BV Number Displays the logical disk number of the base volume in hexadecimal BV OS Type Indicates the OS type of the base volume BV Logical Disk Name Displays the logical disk name of the base volume SV Number Displays the logical disk number of the volume for which a snapshot is to be created in hexadecimal SV OS Type Indicates the OS type of the volume for which a snapshot is to be created SV Logical Disk Name Displays the logical disk name of the volume for which a snapshot is to be created Link Displays the status of the connection with the link volume BV Mode Displays the access restriction of the base volume Execution dialog for snapshot volume operations The execution dialog displayed for snapshot volume operations allows you to switch between the summary display and the details display of the volume related information 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 30 SnapSAN 3000 S5000 Snapshot User Guide Descriptions are given below using an example of the Snapshot Creation dialog Txecution Result Usexecutable Information Status SV Mumber sv 0S Type SV Logical Dpsvr001_ S DPSvrO01_5 G gumary C Derails Choose volume vhich you want to execute from list then
210. he host Read Only The volume can only be read from the host Not Ready The volume cannot be operated from the host Not Available The volume cannot be operated from any host Connection Displays the connection status of the link volume When the link volume is connected a line appears linking the link volume with the connected volume Display of Pair State For between snapshot related volumes The following information is displayed between BV and SV Status Displays the snapshot status Creation Time Displays the time the last snapshot was created Generation Number Displays the generation number and the generation attribute of a snapshot While snapshot restoring the following information is also displayed Restore start Displays the start time of restoration Remaining copy time Displays the estimated time remaining by completion of copy The estimate of remaining time may not be correct because it changes according to the monitoring timing the units the status of lines and so on For between replication related volumes Activity State 10400422 002 02 2013 2013 Overland Storage Inc 45 99 SnapSAN 3000 S5000 Snapshot User Guide Displays the replication operation status Sync State Displays the transition status in the activity state Copy Control State Displays the control status in copying Copy Mode Displays the copy control state in the synchronous state during Replicate Restore Operation Time
211. he logical disk name of the base volume corresponding to the snapshot volume Status Displays the status of the snapshot Display Description Active Indicates a snapshot is created Inactive Indicates a snapshot is not created Indicates the state that data is being restored from snapshot Restoring volume to base volume Deleting Indicates the snapshot is being deleted Indicates the snapshot is released Creating a snapshot Released changes the status to active Restore Indicates the state that snapshot restoration was suspended suspended 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 12 SnapSAN 3000 S5000 Snapshot User Guide Display Description Fault Indicates the snapshot fault state Indicates that state in which a snapshot volume is in SV preparing preparation Indicates the state in which an error occurred when a snapshot SV prepare fault volume was in preparation Restore preparing ndicates the state in which snapshot restore is in preparation Guard Displays the snapshot guard status Display Description Guard Indicates the snapshot is guarded Link Displays the state of the connection with the link volume Display Description Connection Indicates the link volume connection state Creation Time Displays the creation time of the most recent snapshot Nothing is displayed unless a snapshot has been created Generation Number Displays the generation n
212. he product s specified capacity because physical disks are added to the disk array system no additional snapshots can be constructed However operations for the constructed snapshot are available Binding a Logical Disk LD When you bind a snapshot volume consider the following points to determine a logical disk configuration in a disk array Pool and logical disk e Save BV either in the basic pool or the dynamic pool e Save SV and LV in the dynamic pool e Save SRA SDV in the pool where SV is to be created e BV and SV can be created in different pools e Create LV in the same pool as SV e Save all SVs that were set in the same BV in the same pool e Save a control volume CV either in the basic pool or the dynamic pool Then bind a volume used for operations and a control volume used for operations 10400422 002 02 2013 2013 Overland Storage Inc 42 5 SnapSAN 3000 S5000 Snapshot User Guide System Configuration Application Server Backup Serv er Bv Base volume S Snapshot volume SRA Snapshot reserve area LV Link volure ie gt Pool C Control volume gt gt Access Control Figure 2 4 Logical Disk Configuration Settings of Disk Array Name Logical Disk Name and Port Name You can assign identification names to hardware components managed by the SnapSAN Manager Identification names can be given to the following items e Disk Array Subsystem Name e Logical Disk Names Plus Os Type e Port Name
213. hh mm ss Snapshot creation time lt State gt Start Time Start time of the last snapshot operation create restore or delete lt State gt End Time End time of the last snapshot operation create overwrite restore or delete bbbbbbbb Amount of copied data different from the original when restoring data or the amount of deleted data when deleting data in KB dddddddd Capacity of the SV difference management area in KB MB GB or TB preserve_mode Preserve mode link_sts SV link status lv_Id_name LV logical disk name lv_type LV OS Type lv_special_file_name LV special file name access_mode Access restrictions Execution Conditions To display snapshot information the following conditions must be satisfied The SV corresponding to the target BV is bound in advance The following notes do not apply to joint operation with iSM e The volume list is not being created e When specifying the combination of a volume group or a disk group with a logical disk name specify the same number of logical volumes as those constituting a volume group or disk group on the side where the logical disk name is specified to the BV SV In this case snapshot state is displayed in the specified order e When a volume group is specified the target volume group is active e When a disk group is specified the target disk group is active e TheiSM only special file is not being created HP UX system and Linux system only
214. ialog displayed for link volume operations allows you to switch between the summary display and the details display of the volume related information Descriptions are given below using an example of the Unlink dialog Execution Besult Unexecutable Information Link lt G pasary Rewails Choose volume which you vant to execute from list then click Erecute button Tt is possible that multiple volumes are chosen and executed Figure 5 19 Unlink The information screen of the execution dialog displays the information about the items described below The information of each individual item is updated only when the Execute button is clicked Execution Result Displays the execution result of the operation The operation cannot be performed for a volume for which Unexecutable is displayed Unexecutable Information Displays the reason why the operation cannot be executed Link Indicates the status of the connection with the volume LV Number Displays the logical disk number of the link volume in hexadecimal LV OS Type Indicates the OS type of the link volume LV Logical Disk Name Displays the logical disk name of the link volume DV Number Displays the logical disk number of the destination volume DV in hexadecimal DV OS Type Indicates the OS type of the destination volume DV DV Logical Disk Name Displays the logical disk name of the destination volume DV 10400422 002 02 2013 2013 O
215. ical disk must have the same name The default value of the logical disk name input field is a character string consisting of pool name_SDV logical disk number This default value is used when you are not changing the logical disk name Example Pool0000_SDV0011 Pool0000_SDV0012 etc No OS Type can be specified for the snapshot data volume In that case the field is blank The logical disk name can be changed later by selecting the Logical Disk Logical Disk Management Change Settings When naming a logical disk make sure that the name conforms to the following rules A nonconforming name cannot be set Length of the namel to 24 characters Specifiable characters Alphabetical letters A to Z a to z Case sensitive Numbers 0 to 9 Under bar _ Slash All characters must be 1 byte in size Completion jy Mapehot Deserve Area Bind cpa aE tons need SA v Snapshot reserve area binding succeeded Finish Beip Figure 5 35 Reserve Area Binding Success The snapshot reserve area binding result is displayed When the processing succeeded the following link is displayed 10400422 002 02 2013 2013 Overland Storage Inc lt 5 47 SnapSAN 3000 S5000 Snapshot User Guide e Add generation Opens the Generation Addition screen Finish button Returns to the monitoring screen Snapshot reserve area capacity e When the snapshot reserve area is bound the management area is add
216. ical disk name of the destination volume DV This item is shown when there is a volume link LV Mode Displays the access restriction of the link volume This item is shown when there is a volume link Display Description R W Permit Indicates the volume can be read and written from the operating host Read Only Indicates the volume can only be read from the operating host Not Ready Indicates the volume cannot be operated from the operating host Not Available Indicates the volume cannot be operated from any host Snapshot Volume List Per Pool Figure 5 14 Volume List Per Pool The snapshot volume list per pool displays the information about the items described below Double clicking an item switches the display to the base volume unit list corresponding to the selected item Type Indicates the volume type Icon Description Indicates a snapshot volume SV S If the snapshot is released the icon changes to B If a snapshot fault or SV prepare fault occurred the icon changes to SV Number Displays the logical disk number of the snapshot volume in hexadecimal SV OS Type Indicates the OS type of the snapshot volume For information about the displayed type refer to BV OS Type in Base volume list 10400422 002 02 2013 2013 Overland Storage Inc 45 23 SnapSAN 3000 S5000 Snapshot User Guide SV Logical Disk Name Displays the logical disk name of the snapshot volume Status Displays
217. ide You can email our technical support staff at techsupport overlandstorage com or get additional technical support information on the Contact Us web page http www overlandstorage com company contact us For a complete list of support times depending on the type of coverage visit our web site at http support overlandstorage com support overland_care html Conventions This user guide exercises several typographical conventions Convention Boldface Description amp Usage Words in a boldface font Example indicate items to select such as menu items or command buttons Ctrl Alt r This type of format details the keys you press simultaneously In this example hold down the Ctrl and Alt keys and press the r key NOTE A Note indicates neutral or positive information that emphasizes or supplements important points of the main text A note supplies information that may apply only in special cases for example memory limitations or details that apply to specific program versions IMPORTANT CAUTION A An Important note is a type of note that provides information essential to the completion of a task or that can impact the product and its function A Caution contains information that the user needs to know to avoid damaging or permanently deleting data or causing physical damage to the hardware or system WARNING A Menu Flow Indicator gt A Warning contains informatio
218. ification iSMsc_query Displays snapshot information iSMsc_linkinfo Displays link related information Execution Syntax When a snapshot of RV is created by executing the command from a server OS that recognizes MV it is possible to specify the target volume only by the logical disk name It is not possible to specify the target by a special file name drive letter or other types For other operations execution syntaxes are the same as the normal execution syntax Execution Range The execution range of a SnapControl command is a snapshot volume associated respectively with a volume accessible from a server and a paired volume Snap Control Installed Server ISnapshot q lepaceaian Rangel I My o o ja o o Disk Array 1 Disk Array 2 Figure 6 27 Execution Range of Snapshot Operations 10400422 002 02 2013 2013 Overland Storage Inc 46 79 SnapSAN S3000 S5000 Compliance WORM User Guide Execution Conditions and Notes 10400422 002 02 2013 The execution range of a SnapControl command is a snapshot volume associated respectively with a volume accessible from a server and a paired volume The target volume can be specified only by a logical disk name For a pair of Remote Replication to operate a disk array ahead of one layer remotely the link state between disk arrays needs to be normal If one of the disk arrays is in the freeze state remote operation cannot be executed For a pair of Rem
219. ified capacity of 300 GB to the existing data area 1600 GB Before expansion SDV 1600 GB management ara After expansion IL SDV 1900 GB management awa Example 2 When expanding the snapshot reserve area by adding the user specified capacity of 800 GB to the existing data area 1600 GB Before exparsion SDV 1600 GB manazement area After expansion JL SsDVAO 2046 GB SDV l 354 GB rew management area 1 New management area Old management area 1 MB Example 3 When expanding the snapshot reserve area by adding the user specified capacity of 1 GB to the existing data ares 2044 GB and the mamazement eres 2 GB 2 MB SDV 246 GB 254 MB SDVA SDV D 2046 GB SDV l 1 GB 2 MB 10400422 002 02 2013 2013 Overland Storage Inc 47 3 overland storage Appendix A N otes Windows System Volumes and Partitions Snapshot handles target volumes for individual SnapSAN Manager s logical disk If snapshot operation is executed for a volume that contains more than one partition or logical volume in one logical disk for a volume consisting of more than one partition or logical volume and for a volume such as a dynamic disk data consistency is not guaranteed for certain operations The Table lists functional scopes for disk types Disk Type Volume Type Availability Basic Disk Primary partition MBR format v Primary partition GPT format v Logical volume on expanded partition y Dynami
220. ill you create after deleting a snapshot Figure 5 77 Deletion If you select No in this dialog the following confirmation dialog is displayed asking if you want to continue with the processing of the remaining snapshot volumes that are selected 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 78 SnapSAN 3000 S5000 Snapshot User Guide 08601 Is processing continued to the volume of a selection state Figure 5 78 Continue to Selection State Selecting No stops the processing Execution Conditions To execute the snapshot creation operation the following conditions must be satisfied e The target snapshot volume is in the active or inactive state e The target snapshot volume is not guarded e The target snapshot volume is not connected to a link volume e The target base volume is not being restored e Ifthe target snapshot volume is in the active state no other snapshot volume set in the target base volume is being deleted e The disk array is being monitored e The disk array is not in the freeze state e Ifthe target base volume is also used as MV the activity state of the pair is not Restore and the synchronous state of the pair is not Separate Preparing or Sync Preparing e Ifthe target base volume is also used as RV the activity state of the pair is Separate however not separate execution sep exec e The state of the target base volume is not restore fault e The state of the target b
221. ils Clicking the Execute button displays the following confirmation dialog a 08600 tf Will you execute Figure 5 91 Confirmation Execution Conditions To execute the snapshot guard cancellation operation the following conditions must be satisfied The target snapshot volume is guarded The disk array is being monitored The disk array is not in the freeze state The state of the target base volume is not restore fault The state of the target base volume is not snapshot fault If the target base volume is also used as MV the synchronization state of the pair is not Separate Preparing Sync Preparing or Restore Preparing Setting a Link Connect a link volume to a volume It allows a snapshot to be used via the link volume Display the Link Setting screen using one of the following procedures Select a link volume from the information list display area Then from the menu bar of the snapshot management screen select Operation Link volume Operation Link Setting Select a link volume from the information list display area Then right click on the mouse and select Link Setting If the selected link volume already has any connected volume the following confirmation dialog is displayed 10400422 002 02 2013 2013 Overland Storage Inc lt 5 90 SnapSAN 3000 S5000 Snapshot User Guide 08245 A Since it is already under connection the following link volumes cannot carry out link setting
222. ime On the UNIX system iSMsc_create Info iSM19010 iSMsc_create has normally terminated BV id_name type Special File speciai file name SV id_name type Generation generation Status snap_status YYYY MM DD hh mm ss Description ld nams Logical disk name ape OS Type special file names Special file name generation SV relative generation number 1 is displayed immediately after snapshot creation Smap_status SV snapshot status YYYYMMDD hh mm ss Snapshot creation time Execution Conditions To perform snapshot creation the following conditions must be satisfied 10400422 002 02 2013 The relationship between BV and SV to be operated is established The activity state is not SV preparing or SV prepare fault The activity state of BV or SV to be operated is not being deleted restored or prepared for restoration The specified BV is not being restored or prepared for restoration from other generations The target SV is not protected The target SV is not linked with the LV 2013 Overland Storage Inc lt 6 40 SnapSAN S3000 S5000 Compliance WORM User Guide e Ifthe target BV is paired as the MV for replication replication is not in the Restoring Replicate Preparing Restore Preparing or Separate Preparing state e Ifthe target BV is paired as the RV for replication replication is in the Separated state e Data of the target BV is not being migrated that is the target BV is neither a source
223. ine Deletes the mount point and puts the volume in the state where the volume cannot be mounted automatically In addition even when the volume to be unmounted cannot be locked the volume is unmounted forcibly Displayed Information The iSMrc_umount command displays the following messages when Unmount starts and ends Start message Umount Start YYYY MM DD hh mm ss disk_number ld_nametype volume_name 10400422 002 02 2013 2013 Overland Storage Inc 46 74 SnapSAN S3000 S5000 Compliance WORM User Guide path iSMrc_umount Info iSM13221 Resetting drive letter drive has succeeded End message Umount Normal End YYYY MM DD hh mm ss disk_number ld_nametype volume_name path Description YYYY MM DD hh mm ss Start End time Year Month Day Hour Minute Second disk_number Physical disk number ld_name Logical disk name type OS type volume_name Mount point volume name path Drive letter or path name mounted on the NTFS volume folder accessed by users 15M13221 Resetting drive letter drive has succeeded Message output when a drive letter or an NTFS folder name is deleted automatically Execution Conditions To perform Unmount the following conditions must be satisfied e The target volume is registered in the volume list e Read Write is allowed for the target volume e A dynamic disk cannot be specified e When the volume to be unmounted is being used by another application unmount operation m
224. ion 10400422 002 02 2013 2013 Overland Storage Inc lt 6 27 SnapSAN S3000 S5000 Compliance WORM User Guide Starting Volume List Display screen Select Start of Windows Programs All Programs for Windows Server 2008 ControlCommand SnapSAN Manager Agent Utility Volume List Display The Volume List Display screen appears Fal Yolume List Display Ox File view Operation Help a Disk Array Subsystem ALL Drive Letter Path Name Volume Definition LUN LON LD Name DiskAnay Type PD Type TargetName a disk1 005h 0005h 200000 2000000 Iv SAS 5 disk2 006 O006h 200000 2000000 Iv SAS 5 disk3 007h 0007h 200000 2000000 IV SAS 5 disk4 008 0008h 200000 2000000 IV SAS a disk5 050h 0050h 200000 2000000 Iv SAS a disk6 05ih 0051h 200000 2000000 IV SAS disk 052h 0052h 200000 2000000 IV SAS 5 disk8 053h 0053h 200000 2000000 IV SAS disk9 000h O00eh re_test_ 2900 3 v FC 5 disk11 002h 0010h re_test 2900 3 v FC 6 disk14 O005h O013h retest 52900 3 RY FC HE k net 003h 0011h 3 MY FC igqn 2001 03 SH W Wolumet diskt3 Control 004h 0012h te_test 2900 3 v FC 5K W2 Wolumel diskt0 00ih O00fh re_test_ 2900 3 v FC rc_test_0013 2900 3 VOLUME 14 4 Figure 6 7 Volume List Display Disk Terminating the Volume List Display screen Do one of the following e
225. ion only associated with specified disk arrays sorted by using logical disk number as the key If a specific logical disk number is specified the system displays information only associated with the specified logical disk number ve option Displays information only associated with specified disk arrays sorted by using logical disk name as the key If a specific logical disk name is specified the system displays information only associated with the specified logical disk name 10400422 002 02 2013 2013 Overland Storage Inc lt 4 6 18 SnapSAN S3000 S5000 Compliance WORM User Guide Option ai option Description Displays information associated with logical disks and configuration information Displays only information associated with specified PD Type if the PD Type attribute of the physical disk configuring the logical disk is specified ctl option Lists the special file name and logical disk number of a control volume and the corresponding disk array name p option Displays the version information and the date when the volume list was created as property information of the volume list ax option Lists disk array information information about correspondence and configuration of all logical disks and property information of the volume list tgt option Displays the targetname of the volume in the volume list all option ldname option Displays iSCSI information of all iSCSI
226. ions To execute the access mode change operation the following conditions must be satisfied e The target link volume is connected e The target destination volume is a snapshot volume e The disk array is being monitored e The disk array is not in the freeze state 10400422 002 02 2013 2013 Overland Storage Inc 45 97 SnapSAN 3000 S5000 Snapshot User Guide Displaying the Volume Connection Status Display the volume connection status The Connection screen can display snapshot related volumes and replication related volumes The snapshot volumes for which snapshot is active are displayed in order of created time Display the Connection screen using one of the following procedures e Select a volume from the information list display area or configuration display area Then from the menu bar of the snapshot management screen select View Connection Screen e Select a volume from the information list display area or configuration display area Then right click on the mouse and select Connection Screen e Select a volume in the base volume unit list in the information list display area press the Enter key e Double click a volume in the base volume unit list in the information list display area Connection Screen StorageS4900_2 StorageS4900_3 Storage S4900_3 StorageS4900_2 ch8h WN WN LDM_49_3_1 O01bh WN LDR_49_2 1 ea RemoteDataReplication Activity State Separate Syne State Separated
227. ions are not displayed in the volume list e The snapshot type is SV LV SDV or SV e CV Control Volume 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 40 SnapSAN 3000 S5000 Snapshot User Guide Logical disks that meet any of the following conditions cannot be selected Condition Has Max Generations Description The number of generations is 16 maximum number Exceeds Capacity Limit The logical disk capacity exceeds the capacity limitation 10 TB 10240 GB Abnormal Snapshot State A BV in the snapshot fault state Abnormal Restore State A BV in the restore fault state Linked Diskarray MV RV or RV MV that does not has the snapshot link function for MV Unsupport At Group Registered in an ATgroup Reserved Belongs to a reserve group Data Protection Data protection was set During Reinit Being reinitialized because the protection for the volume are released by the WORM function Locked Configuration change is locked Pd Rotation Stop A disk in the rotation stop state by the eco mode Thin Provisioning A pool to be used by thin provisioning function which was bound on a disk array that does not support the snapshot function To check the conditions above information on the link disk array is needed If this information cannot be obtained no generation can be added Select the area for creating a snapshot from the list Specify the area pool in
228. iption Active Indicates a snapshot is created Inactive Indicates a snapshot is not created Indicates the state that data is being restored from snapshot Restoring volume to base volume Deleting Indicates the snapshot is being deleted Indicates the snapshot is released Creating a snapshot Released changes the status to active Restore Indicates the state that snapshot restoration was suspended suspended Fault Indicates the snapshot fault state Indicates that state in which a snapshot volume is in SV preparing preparation Indicates the state in which an error occurred when a snapshot SV prepare fault volume was in preparation Restore preparing Indicates the state in which snapshot restore is in preparation Guard Displays the snapshot guard status Display Description Guard Indicates the snapshot is guarded Link Displays the state of the connection with the link volume 10400422 002 02 2013 2013 Overland Storage Inc lt 5 20 SnapSAN 3000 S5000 Snapshot User Guide Display Description Connection Indicates the link volume connection state Creation Time Displays the creation time of the most recent snapshot Nothing is displayed unless a snapshot has been created Generation Number Displays the generation number of the snapshot This item is shown when the snapshot is active or being restored For the derived generation without any generation number no generation number is displayed
229. is necessary to reexecute restoration from rst suspended the suspended snapshot When a snapshot fault occurred in a snapshot the created snapshot is automatically deleted and the snapshot operation is disabled It is necessary to rebind the SV LV and SRA SDV Managing Snapshot Generations The snapshot function can create multiple snapshots for one BV When you use an arbitrary SV you need information to identify when each of snapshots was created and which the latest snapshot is The snapshot function provides the generation management function to manage multiple snapshots Identification information of Generation The following information is provided to identify snapshots Snapshot creation time Time when a snapshot was created Generation number A generation number is given to each snapshot 1 is given to the latest snapshot and then 2 and 3 are given in order A generation number is given for each SV and updated automatically when a snapshot is created deleted or snapshot restoration is executed When snapshot restoration is executed in the derived SV keep mode to be described later the generation number of a snapshot of which generation is later than the restoration source is given as Snapshot can identify SV by specifying the generation number for BV Derived Generation When multiple snapshots are created from a BV and restoration is executed from a snapshot that is not the latest one SVs retaining data later
230. is no means to avoid the failure wait for 60 seconds in that state and proceed to Step 5 It is possible to create a snapshot without unmounting in this step It is necessary however to pay full attention to data consistency iSMrc_umount drv G 5 Creating a snapshot application server Create a snapshot on SV and enable operation to be restarted iSMsc_create bv bv001 bvflg ld cyclic 6 Setting SV guard application server Set SV guard classification to prevent snapshot from being overwritten by cyclic use while waiting for the backup to be completed to a tape or other device iSMsc_svguard bv bv001 bvflg ld sv 1 svflg relgen mode set 7 Mounting BV application server Mount BV to use as a business volume again iSMrc_mount drv G 10400422 002 02 2013 2013 Overland Storage Inc 44 4 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault 10400422 002 02 2013 8 Restarting applications application server Restart the applications closed in Step 2 If services were halted in Step 2 restart the services by the following procedures If services were not halted in step 2 executing of the following is not required Example Starting service NET START service name To start the service ESMCommonService specify as shown below NET START ESMCommonService If sharing of a folder was cancelled in Step 2 specify sharing again If sharing was not cancelled in Step 2 executing of the
231. isk Array List Disk Array Name NumberofLDN disk_srsy_nsme number Volume List LDN LD NAME VAA TYPE Special File Disk Array Path PD Type kin k_name vss type specis _file_nsme disk_srsy_nsme psth pd_type Property of Volume ListFile Version version Crested yyyy mmidd hh mm ss Owner Host Name host_name Disk Array disk_smsy_number Volume Information Description XXXXX YYYY MMDD HH MM SS disk_amay_name 1d_name ge spacial _ le_ name disk_amay_neme pd type yyyy mm dd hh mm ss host_name disk_amay_numbar volume_number Version information of the executed iS Mvollist command Execution date of the iSMvollistcommand Disk amay name Number of logical disk information items spacial file for each disk armay registered in the volume list Logical disk number Logical disk name VAA Volume Absolute AVolume Cloningess OS type Special filename Displayed as a 32 byte item on HP UX and Linux as well as 64 byte item on Solaris Disk amay name Whether to use a spacial file Usually this field is blank and nothing appears in this field however when data replication or snapshot is performad ifan error is detected im access to the special file B appears PD Type Version information of the iS Mvollist commandused to create the volume list Date when the volume list was created or updated Host name of the server owning the volume list Total number of disk arrays in the
232. it is a base volume When the destination volume is a base volume the volume needs to be unmounted from the host Unlinking Unlink a volume connected to a link volume Display the Unlink screen using one of the following procedures 10400422 002 02 2013 Select a link volume from the information list display area Then from the menu bar of the snapshot management screen select Operation Link volume Operation Unlink 2013 Overland Storage Inc 45 93 SnapSAN 3000 S5000 Snapshot User Guide e Select a link volume from the information list display area Then right click on the mouse and select Unlink Unlink Unexecutable Information Link LV Number LV 0S Type LV Logical Connecting 0046h NX Ce Summary Ei Details Choose volume which you want to execute from list then click Execute button It is possible that multiple volumes are chosen and executed Figure 5 97 Unlink From the list select the link volume you want to unlink and then click the Execute button You can specify two or more volumes at a time and execute the operation for all of them simultaneously Unexecutable volumes cannot be selected Selected Volume List This part of the screen displays a list of the information about the link volume selected from the information list display area If Unexecutable is shown in the Execution Result field the volume does not meet the execution conditions and therefore cannot
233. iting signature set e Restores the signature saved in the map file to the disk e Deleting signature del e Deletes the saved signature from the map file e Initializing signature init e Initializes the signature of the physical disk e Displaying the list of signature information list e Displays a list of signatures saved in the map file and those saved in the disk array or displays the signatures of the specified physical disk e Exporting signature to a file export e Writes the signature information to the specified file 10400422 002 02 2013 2013 Overland Storage Inc 46 76 SnapSAN S3000 S5000 Compliance WORM User Guide e Importing signature from a file import e Reads and registers the signature information recorded in the specified file e Saving signature read Saves the disk signature recognized by the Windows system Signatures are recorded in the signature map file managed by the iSMrc_signature command e Writing signature set Restores the signature saved in the map file to the disk e Deleting signature del Deletes the saved signature from the map file e Initializing signature init Initializes the signature of the physical disk e Displaying the list of signature information list Displays a list of signatures saved in the map file and those saved in the disk array or displays the signatures of the specified physical disk e Exporting signature to a file export Writes th
234. l button displays the following dialog On this dialog you can stop deleting snapshots and return to the snapshot management screen to perform another operation The state of a selected snapshot can be checked with the information list display area on the snapshot management screen 08420 1 Operation of snapshot deletion was canceled during the process The state of selected snapshots can be checked by the snapshot screen Figure 5 82 Deletion Cancelled Execution Conditions To execute the snapshot deletion operation the following conditions must be satisfied 10400422 002 02 2013 The target snapshot volume is in the active state The target snapshot volume is not guarded The target snapshot volume is not connected to a link volume The target base volume is not being restored No other snapshot volume set in the target base volume is being deleted The disk array is being monitored The disk array is not in the freeze state If the target base volume is also used as MV the synchronous state of the pair is not Separate Preparing or Sync Preparing The state of the target base volume is not snapshot fault 2013 Overland Storage Inc lt 4 5 82 SnapSAN 3000 S5000 Snapshot User Guide When deletion started Success is shown in the Execution Result field and Deleting is shown in the Status field of the selected volume list Then after deletion is completed Status is changed to Inactive Clicking
235. l Fault 1 Starting server Start the server that has been down 2 Setting a link If a link is released execute the following command iSMsc_link lv lv001 lvflg ld sv bv001 1 svflg ld relgen 3 Recognizing the SV LV again Execute the following command to make the operating system recognize SV LV volume iSMrc_scan Depending on when the server goes down you need to reset a driver letter After executing the command above check the volume list and reset the SV LV drive letter that was set before the restart You can reset a drive letter on the Disk Management screen or by executing the iSMrc_mount command 4 Unmounting a volume and releasing a link After recognizing the disk execute the following operations to return to normal operation Wring data to the file system buffer iSMrc_flush mvol Volume 37d84cca 2507 11d5 a0 7 00004c714491 Unmounting a volume iSMrc_umount mvol Volume 37d84cca 2507 11d5 a0f7 00004c714491 Releasing a link iSMsc_unlink lv lv001 lvflg ld 5 Returning to normal operation Execute Snapshot Operations e When the partition contains an error execute snapshot Preparing Volume If a message above does not appear and access to the volume of the target SV LV is allowed an illegal RV file system is suspected Restore the system by the restoration procedures Restoration For restoration take Step according to Down of Server Machine Connected to SV LV Down of Serve
236. lar limit for the number of link volumes available for binding The upper limit is the number of logical disks which can be bound in a pool or disk array Link Volume Bind Gatink volume Bind Link volume Bind gt Confirmation gt Completion Explanation One link velume is bind to one bare voluse Link volume is bind to the same Pool as smapshot voluae Cancel Help Figure 5 31 Link Volume Bind Wizard Select base volumes in which link volumes is bind Multiple base volumes can be selected Locked A base volume on which configuration setting operation guard is set Next button Proceeds to the Confirmation screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends A link volume cannot be bound if 1024 logical disks exist in the disk array Confirmation 000 h 2000000991010010_LV000 10 0 P0010001 Click Advanced tor modifying the default settings in the field above A vancea When the settings are OK click Set to start binding the link velune Tf you want to modity any settings click Back JE eS ee Figure 5 32 Link Volume Confirmation This screen is to confirm the settings to bind a snapshot reserve area Check whether the displayed settings to bind a snapshot reserve area are correct 10400422 002 02 2013 2013 Overland Storage Inc 45 45 SnapSAN 3000 S5000 Snapshot User Guid
237. lays the volume type Icon Description is Represents a base volume BV tod If err fault or snapshot fault occurred the icon changes to When the replication function is used the volume attribute of replication is also displayed Display Description BV MV Indicates BV having the MV attribute BV RV Indicates BV having the RV attribute BV RV MV Indicates BV having the RV and MV attributes BV Number Displays the logical disk number of the base volume in hexadecimal BV OS Type Indicates the OS type of the base volume Display Description A2 Indicates the logical disk is operating on an ACOS 2 system A4 Indicates the logical disk is operating on an ACOS 4 system 10400422 002 02 2013 2013 Overland Storage Inc 45 9 SnapSAN 3000 S5000 Snapshot User Guide Display Description AX Indicates the logical disk is operating on an AIX system CX Indicates the logical disk is operating on a Solaris system LX Indicates the logical disk is operating on a Linux system NX Indicates the logical disk is operating on an HP UX system SX Indicates the logical disk is operating on a SUPER UX system WN Indicates the logical disk is operating on a Windows system excluding GPT disk WG Indicates the logical disk is operating on a Windows system GPT disk BV Logical Disk Name Displays the logical disk name of the base volume Status Displays the snapshot status of the base volume
238. list displays B in the Path information of the spacial files and indicates that some eror has occurred in the paths special files in the relevant logical disk After apath enor is recovered when access to a volume by a blocked path is established successfully the Path information of the special file is cleared and the blocked state is released When the ai option is spacified Correspondence and configuration information about logical disks as shown below is listad Volume List iSMvoliist Version X X JOX LDN LD NAME VAA TYPE Specis File Disk Array Psth PD Type kin Ki_name vss type specis _file_name disk_srsy_nsame psth pd_type Description XXXXX Information about the version of the executed iS Mvollist command ldn Logical disk number 1d_name Logical disk name vaz VAA Volume Absolute AVolume Cloningess type OS type spacial file name Special file name Displayed as a 32 byte item on HP UX and Linux as well as 64 byte item on Solaris disk_anay_meme Disk amay name path Whether to use a spacial file Usually this field is blank and nothing appears in this field however when data replication or snapshot is performed ifan emor is detected in access to the special file B appears pd type PD Type 2013 Overland Storage Inc lt 6 21 SnapSAN S3000 S5000 Compliance WORM User Guide 10400422 002 02 2013 v vi vit When the ctl option is specified Information on a control volume
239. llowing characteristics e If BV is updated after a snapshot creation the image before update is stored e One SRA can be created for a pool and is needed for a pool that binds SV e An SRA shares and retains differential data of multiple SVs e An SRA can be bound only in a dynamic pool e An SRA can be extended without operation down time when space is running short 10400422 002 02 2013 2013 Overland Storage Inc 43 9 SnapSAN 3000 S5000 Snapshot User Guide Update Snapshot Reserve e lt l gt Area SRA lt lt 2 gt Update lt 1 gt Total amount of snapshot reserve area lt 2 gt Threshold SDV Snapshot Data Volurne Figure 3 9 Snapshot Reserve Area SRA The following functions related to the snapshot reserve area are provided Binding the Snapshot Reserve Area The snapshot reserve area is bound by the configuration setting function of the SnapSAN Manager client The snapshot reserve area needs at least 2 GB The snapshot reserve area consists of one or multiple snapshot data volumes SDVs SDV is a specific logical disk that a server cannot access directly If the capacity exceeds 2 TB multiple SDVs are used to bind the snapshot reserve area Expanding the Snapshot Reserve Area The snapshot reserve area can be expanded by the configuration setting function of the SnapSAN Manager client Specify capacity to expand Monitoring the Snapshot Reserve Area When the snapshot reserve area is running
240. llowing menu items View Environment Settings Environment Settings rm Information Acquisition Interval 10 to 120 sec 60 Second s Interval is the amount of time from this information acquisition to the next time Snapshot volume View Order Creation Time Order Snapshot volumes of each base volume list are displayed in order of a creation time Figure 5 110 Environment Settings Information Acquisition Interval Set the interval of acquisition of the used snapshot capacity information to be displayed on the screen The interval is the amount of time between one successful information acquisition attempt and the next 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 108 SnapSAN 3000 S5000 Snapshot User Guide Snapshot volume View Order Specify the order in which snapshot volumes of which snapshot is active are to be displayed in the base volume unit list To display snapshot volumes in the creation time order check the checkbox After the setting the snapshot volumes are displayed in the specified order when the screen display changed To arrange that the settings will be reflected next time the snapshot management screen is displayed select Record Screen Information in the View menu Updating to the Latest Information Executing the refresh function with the SnapSAN Manager server selected in the configuration display area updates the information about the disk array connected to the
241. lume bvflg bv_flg Specify the volume and volume type of the BV e Specification of the SV sv volume svflg sv_flg Specify the volume and volume type of the SV On the Windows system when a specific partition drive letter is specified for a volume consisting of multiple partitions all partitions in the volume become operation targets therefore the default setting does not allow the multiple partitions to be operated Operations can be performed for a volume consisting of multiple partitions by changing the settings in the operation option setting file Wait specification wait nowait Specify whether the system will wait until the restoration operation is completed If wait is specified the system waits for the snapshot to enter the snapshot active state If nowait is specified the system terminates the command upon completion of the restore start instruction The default setting is wait Specification of an Operation Mode Specify an operation mode at restoration There are two operation modes for restoration e Derived SV auto delete mode derivsv delete Snapshots of which generation is later than the restored generation are deleted at execution of restoration e Derived SV keep mode derivsv keep Snapshots including those of which generation is later than the restored generation are kept The default value follows the operation option setting file or setting of environment variables 10400422 002 02 2013
242. n concerning personal safety Failure to follow directions in the warning could result in bodily harm or death Words in bold font with a greater than sign between them indicate the flow of actions to accomplish a task For example Setup gt Passwords gt User indicates that you should press the Setup button then the Passwords button and finally the User button to accomplish a task Information contained in this guide has been reviewed for accuracy but not for product warranty because of the various environments operating systems or settings involved Information and specifications may change without notice 10400422 002 2 2013 2013 Overland Storage Inc lt 4 PR iv overland storage Contents Preface Chapter 1 Overview LOGICA GMA Physical FaUl ssrsrssniineann aa aaaea Raa A ARANEAE 1 2 Logical FOUN sccsessascavsscasaseaevcicezeacancacavcncaascalcncaccheadevcbcazandavcbiaveacavaacadcucauay cad AA NN AAAA AA 1 2 PRYSCOLFOUIT aisiais naa a a aa e area aaa TEA aE A E 1 2 Backup OPSRGTON sds siscsceiss shesccaissstuaseabubcssasesibedsanias wassaniexraaataieeciagsstoasdarend nach adasd dard AKA D AKE RNAi ASAA kaiaka 1 2 Backup Operation Using Snapshots Of Multiple Generations oo eeeecseescseeceseeecseeceseeeeseeeeseseeseseesesees 1 3 Secondary Use in Test Operation or Search Operation ccccscesessessecsesseecsecseeeceecsecsecsececeecsecsecseeasesenaes 1 4 SYSTSMV C OMMOWRATIOM anaa dees dave saiehhuwstlh abiatse
243. n of the Target SV Specify the volumes of the BV and SV e Specification of the BV bv volume bvflg bv_flg Specify the volume and volume type of the BV e Specification of the SV sv volume svflg sv_flg Specify the volume and volume type of the SV 10400422 002 02 2013 2013 Overland Storage Inc lt 6 41 SnapSAN S3000 S5000 Compliance WORM User Guide e Auto specification auto Specify this option to arrange that a vacant generation will be selected and secured automatically If there is a vacant generation the command terminates normally without performing any operation If there is no vacant generation the oldest generation for which the SV guard classification is not set will be selected e Batch specification all Delete all the generations all at once If all generations are vacant the command terminates normally without performing any operation The same BV cannot be deleted if it has an SV in guard classification or link setting under it On the Windows system when a specific partition drive letter is specified for a volume consisting of multiple partitions all partitions in the volume become operation targets therefore the default setting does not allow the multiple partitions to be operated Operations can be performed for a volume consisting of multiple partitions by changing the settings in the operation option setting file 10400422 002 02 2013 2013 Overland Storage Inc 46 42 SnapSAN S3000 S5000 C
244. n operations a conflict may occur in the disk signatures of MV and RV In such a case you can use the Disk Signature operation command to restore them To perform the disk signature operation you can specify the disk number to operate in units of disks or you can operate all disks as targets Main Options For the iSMrc_signature command you can specify the following options regarding Disk Signature operation e 4 10 4Disk Signature Operation Command e For the disk signature operations the iSMrc_signature command is used e A disk signature is system information used for identifying the disk on the Windows system On the Windows system two disks with the same signature cannot be used in the same system Data Replication automatically avoids the same disk signature when MV and RV are synchronized If a failure occurs during replication operations a conflict may occur in the disk signatures of MV and RV In such a case you can use the Disk Signature operation command to restore them To perform the disk signature operation you can specify the disk number to operate in units of disks or you can operate all disks as targets e Main Options e For the iSMrc_signature command you can specify the following options regarding Disk Signature operation e Saving signature read e Saves the disk signature recognized by the Windows system Signatures are recorded in the signature map file managed by the iSMrc_signature command e Wr
245. n the command is executed with the offline option specified an application that is accessing the target volume may terminate abnormally iSMrc_umount drv G offline 4 Setting a link between LV and BV backup server To access BV from a backup server link LV to BV iSMsc_link lv 1lv001 lvflg ld bv bv001 bvflg ld About setting a link to BV Setting a link to BV enables access to BV from a backup server however an access from an application server to BV is disabled To set a link to BV be sure to terminate operation and unmount BV from an application server Mounting LV backup server To link LV BV and the file system mount LV BV When a drive letter or an NTFS folder name is specified together in the mount command after LV BV is mounted the drive letter or the NTFS folder name is reset automatically iSMrc_mount mvol Volume 37d84cca 2507 11d5 a0f7 00004c714491 drv H 6 Restoring data from a backup medium to BV backup server Restore data saved in a backup medium to BV directly via LV using backup software Flushing LV file system backup server Flush the LV BV file system and write the unwritten data in file system buffer onto disk isMrc_flush drv H 8 Unmounting LV backup server Unmount LV BV and cancel association between the volume and the file system When the LV BV is unmounted the mount point drive letter or NTFS folder name set for the volume is automatically d
246. n the processing succeeded the following links are displayed e Add another generations Opens the Generation Addition screen to add other snapshot generations e Bind link volume Opens the Link volume Bind screen 10400422 002 02 2013 2013 Overland Storage Inc 45 52 SnapSAN 3000 S5000 Snapshot User Guide Finish button Returns to the monitoring screen Binding a Link Volume The work of binding a link volume is done using the Link volume Bind screen in the wizard format as follows Link volume Bind Source volumes to bind link volumes are selected Confirmation Link volumes to bind are displayed Check whether the settings are correct e Advanced Click this button to make detailed link volume settings Completion The link volume binding result is displayed e Only one link volume can be bound for one base volume per operation However by performing this operation multiple times multiple link volumes can be bound for one base volume e There is no particular limit for the number of link volumes available for binding The upper limit is the number of logical disks which can be bound in a pool or disk array Link Volume Bind Link volupe Bind gt Confirmation gt Completion uber Type togical dik name Capeciey ee Used for Foo name 0000h 2000000993101001 00000 10 0 Snapshot P0010001 5 lt Explanation gt One link volume is bind to one base volume Link volume is bind te the same Pool as snapsh
247. n type is the most basic type when snapshot operation is performed by an application server It is possible for the user to prepare a volume that can issue an I O securely to a disk array and operate it through the specific volume control volume The operation through the control volume is effective especially in the backup server environment where even if the target volume LV is connected OS cannot access the volume For the direct operation for a disk array the logical disk of the target BV or LV needs to be registered in the volume list in advance on the server where commands for the snapshot operation are executed Operations linked with the SnapSAN Manager Installing SnapControl in the management server and linking it with the snapshot management function of the SnapSAN Manager for operations enable you to manage and maintain the data snapshot function and to construct the environment by commands The logical disk to be operated does not need to be connected to the server Therefore you do not need to create the volume list The command to create and display the volume list SMvollist and the commands used for disk management and operations such as file system flushing mounting and unmounting iSMrc_ flush iSMrce_mount iSMre_umount iSMrc_ signature and iSMrc_scan are functions that involve operating volumes of the system directly They are not used for joint operations with SnapSAN Manager Command Name Operation Direct
248. napshot volume you want to restore and then click the Execute button 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 83 SnapSAN 3000 S5000 Snapshot User Guide You can specify two or more snapshot volumes set in different base volumes and execute the operation for all of them Unexecutable volumes cannot be selected Selected Volume List This part of the screen displays a list of the information about the snapshot volume selected from the information list display area If Unexecutable is shown in the Execution Result field the volume does not meet the execution conditions and therefore cannot be selected If there is any unexecutable volume refer to the Unexecutable Information and take one of the following actions Unexecutable Information Snapshot Inactive Action Execute the operation for a snapshot volume whose snapshot state is active Execute the operation for a snapshot volume whose Snapshot Deleting snapshot state is active Snapshot Restoring The snapshot is already being restored The snapshot volume is connected to a link volume Retry SV Connecting after unlinking the link volume New Generation Guard A generation newer than the target snapshot volume is guarded Retry after canceling the guard Data is being restored from the snapshot volume of some other pair This operation cannot be executed during BV Restoring restoration The base volume is connected to
249. nation disk is disabled e If FAT16 FAT32 is used as a file system associate the file system with the drive by using the mount command of the disk control operation commands or by starting Disk Management Windows e If FAT16 FAT82 is used as a file system an attempt to write to SV LV ends up with an error Therefore do not use any application that automatically executes write operation for the drive Do not execute any operation e g changing of a partition configuration that executes write operation to the link destination disk through Disk Management Windows When you re scan and update a disk by using Windows Disk Management in a Windows Server 2008 environment the following error message may be recorded in the event log ifa volume in Not Ready or Not Available state such as an unlinked LV or access restricted LV exists However the operation is not affected lt Message example gt Error An unexpected error has occurred Error code 13 02000018 Snapshot and Data Consistency For making copies of operation data with the snapshot function and for putting the data in use the data must be that of a user s expected point in time and the data must be complete Furthermore using snapshot SV on Windows operating system requires consistency in the file system The following must be considered for making the snapshot data usable Snapshot creation and data consistency BV To use a snapshot on a backup server crea
250. nd save images retained in SV to a tape or other backup media via LV lt Restoration gt At occurrence of a logical fault restore data from an appropriate SV directly At occurrence of a physical fault restore data from a backup medium to BV Secondary Use in Test Operation or Search Operation You can create a replication volume using a snapshot and use the volume for test operation or search operation as secondary use When you bind test operation you can bind the same environment as the actual operation easily It is possible to evaluate an operation program using the latest data that is used for actual operation This enables you to evaluate an operation program with significant efficiency If you bind search operation you can retain data of past specific days or specific time for multiple generations Since only the differential information of the created snapshot data is retained in storage information on multiple generations can be maintained at low cost 10400422 002 02 2013 2013 Overland Storage Inc 41 4 SnapSAN 3000 S5000 Snapshot User Guide Backup Operation Appication Server Figure 1 4 Secondary Use in Test or Search Options lt Creating a snapshot for test operation gt 1 Create a snapshot from an application server and access SV from a server for test operation via LV Temporarily halt actual operation and ensure the static point Create a BV snapshot in the specific SV At this time you can protec
251. nditions To execute the snapshot guard operation the following conditions must be satisfied 10400422 002 02 2013 The target snapshot volume is in the active restore preparing or restoring state The target snapshot volume is not guarded The disk array is being monitored The disk array is not in the freeze state The state of the target base volume is not restore fault The state of the target base volume is not snapshot fault If the target base volume is also used as MV the synchronous state of the pair is not Separate Preparing Sync Preparing or Restore Preparing 2013 Overland Storage Inc 45 88 SnapSAN 3000 S5000 Snapshot User Guide Canceling the Snapshot Guard Cancel the guard of the snapshot held in a snapshot volume The function enables the snapshot creation and deletion operations for the snapshot Also the snapshot is subject to the snapshot cyclic creation operation Display the Snapshot Guard Cancel screen using one of the following procedures e Select a snapshot volume from the information list display area Then from the menu bar of the snapshot management screen select Operation Snapshot Operation Snapshot Guard Cancel e Select a snapshot volume from the information list display area Then right click on the mouse and select Snapshot Guard Cancel Snapshot Guard Cancel Execution Result Unexecutable Information Guard Status SV Number SV 0S Type WN Guard Active 003dh
252. ng status without stopping operations Refer to 3 6 Snapshot and Data Consistency 10400422 002 02 2013 When Unmount is executed for a drive on a Windows system the drive may be automatically mounted if a service or application which accesses a disk is operating Therefore when unmounting drive using iSMrc_umount command all applications and services accessing to the drive must be terminated in advance Applications example e Explorer e Recycle bin e JIS CIS Admin Service World Wide Web Publishing Service e FTP FTP Publishing Service e FSRM File Server Resource Manager e Link Tracking Service e Monitor virus drive software e Backup software Applications accessing to the drive is identified using the following utility visit the Web site for detailed use of the software Utility Process Explorer GUI type Handle command line typ Web site http www sysinternals com Tf access to drive is not complete unmounting iSMrc_umount may terminate abnormally It is useful to create a batch file that activates Handle upon abnormal termination of unmounting iSMrc_umount When you execute forcible unmounting you can execute the iSMrc_umount command with the force option to discard cache data of the SV LV file system However note that it causes errors in applications and services accessing to the drive 2013 Overland Storage Inc lt 4A 8 SnapSAN 3000 S5000 Snapshot User Guide Snapshot and Data C
253. nnes NNa AEE NNa A A E bere 6 71 Chapter 7 Binding and Expanding SNOPSNOPRESOIVS ATE ON Tiji er irere E TEE E EEEIEE EAE TERT 7 1 BiG TRONS ar ds vesessenatventsdiuatorsstiveecbeveaeeausha ceed biddeotisioladeotinn tes N 7 1 ABOUT Expansion from iSM esisoomuse eadsaaasesotdsonsncessdcauteseswisoostonsdupensobissevteossbesotobsdstaacoy 7 3 Appendix A Notes Windows System Volumes GNC PCITITIONS oo cccceccsessssescssescsecscseescsecseseceesecsesecseseseesesesseseesesasseseseseeacsesesseseeeeses A 1 File System Selection cccsecssesssscsscsesscescescssessessessesecseseesscsseseessessesessesesescescssesesecsesuesseeesesesscsecseseeescascaeseeeses A 2 BIRSTE O EE E A A E T A 3 Snapshot Access RESITICTION SEIOCTION cssssesscecsececsecscsecsssscsssscessncecsescsssscsesscsssscetsscsesscssensstssesesesscsesecseenees A 3 Snapshor and Data ConsistOnCy ansman iea AA A AS A 4 AGGCESS RIGMT Seinos ON VOLUMES saiisine an E S A 6 Contool y OUI Ss sesona ro nean E A A 6 Stator sever Connecied TO SV LV a ssscsvesccvexes Giestex seed casthsadetoaciicadestessteusdies S A 7 Management and Operations Of SNAPSHOT csecssecssecessecsssscscsecstescsssncsssssscensscsesecssscsescstencsesaces A 7 LINKING wiih Repicaion FUNCTION sssiasiviesdandetactnan iin eanninteiiaieindancahiatnaninlndernus A 10 Appendix B Licenses Apache license caedi aaa Basen Sets Menavtahesieds Angatasbdas a bias aeons eee B FEX LIC CTS a sissicetanscrsveaanastaeesiaddciade
254. ns information of disk arrays and logical disks again No information is displayed protect option Provides additional information of whether the logical disks are protected by the WORM function when the protect all option or protect only option is specified When only protect is specified only protected volumes are displayed Specify this option together with the a option or de option node option Provides additional information of the node number to which the logical disk belongs when the node option is specified Specify this option together with the a option or de option Displayed Information When the a option or the de option is specified Logical disk information as shown below is listed Receiving Disk Array Name Mansgement LDN OS Type LDNsme Attribute Capacity PD Type disk_arasy_name manasgeament kin type lkd_name attribute capacity pd_type 10400422 002 02 2013 2013 Overland Storage Inc 46 63 SnapSAN S3000 S5000 Compliance WORM User Guide Description Receiving Message indicating that data is being received During a joint operation with iSM this message remains until data reception is completed The number of dots increases as data reception progresses disk_array_name Disk array name management Identifies whether the system recognizes the disk array directDisk array directly recognized by the system indirectDisk array which is not recognized by the system type OS
255. nsistency is found in the control volume definition delete the control volume definition Explanation Indicates that the defined control volumes are invalid The following is the corresponding operations e Binding the control volume using the SnapSAN Manager configuration setting function and making it available from the server in a disk array with which the control volume attribute can be identified Action Delete the existing control volume definition since the control volume definition becomes unnecessary for the disk array Register change or delete a control volume A control volume is used to issue a control I O to a disk array from a server A logical disk can be selected for each disk array As a control volume select a standard volume that is not used by data replication or snapshot Allocate the control volume as a dedicated volume and do not store business data in it 10400422 002 02 2013 2013 Overland Storage Inc 46 35 SnapSAN S3000 S5000 Compliance WORM User Guide Register or change a control volume To register or change a control volume select the logical disk to be used as a control volume from Candidate Volume List and click the Add or Update button j Define Control Yolume LOCAL_DATA1 Tokyo_Customer_ LOCAL_DATA2 Tokyo_Customer_ Figure 6 20 Register Control Volume Define Control Yolume BACKUP_CY Tokyo_Customer_ Figure 6 21 Change
256. nt points are set for a volume use the D option of the MOUNTVOL command to set only one mount point for the volume and then unmount the volume e When LV is unmounted by the iSMrc_umount command or unlinked by the iSMsc_unlink command and then the server is restarted Initialize and Convert Disk Wizard may start for Windows Server 2008 Write Signature and Upgrade Disk Wizard for Windows 2000 Server after opening the Disk Management screen This wizard starts when there is a volume unavailable in Windows operating system thus there is no problem with the operating system When this wizard has started close the screen by clicking the Cancel button Linking with Replication Function To create a snapshot using the RV of Volume Cloningor Remote Replication as the BV the license of Snapshots Version3 is required Concerning the disk array pair connected to use Remote Replication when one disk array is monitored by the SnapSAN Manager and other is not you must pay attention In this configuration when the license of Snapshots in a disk array outside SnapSAN Manager management is upgraded to Version3 you have to reboot the SnapSAN Manager To create a snapshot using the RV of Volume Cloningas the BV the RV must be separated separated When you perform Separate immediate of the replication function the RV becomes available available for read or write however a snapshot cannot be created Wait for separated separated 104
257. o D TF ae Overland SnapSAN Snapshot Storage User Guide 3000 S5000 February 2013 10400422 002 overiand storage SnapSAN Snapshot User Guide 2013 Overland Storage Inc All rights reserved Overland Overland Data Overland Storage ARCvault DynamicRAID LibraryPro LoaderXpress Multi SitePAC NEO NEO Series PowerLoader Protection OS REO REO 4000 REO Series Snap Appliance Snap Care EU only SnapServer StorAssure Ultamus VR2 and XchangeNOW are registered trademarks of Overland Storage Inc GuardianOS RAINcloud SnapDisk SnapEDR Snap Enterprise Data Replicator SnapExpansion SnapSAN SnapScale SnapServer DX Series SnapServer Manager SnapWrite and SnapServer Manager are trademarks of Overland Storage Inc All other brand names or trademarks are the property of their respective owners The names of companies and individuals used in examples are fictitious and intended to illustrate the use of the software Any resemblance to actual companies or individuals whether past or present is coincidental PROPRIETARY NOTICE All information contained in or disclosed by this document is considered proprietary by Overland Storage By accepting this material the recipient agrees that this material and the information contained therein are held in confidence and in trust and will not be used reproduced in whole or in part no
258. of a display command the display result is not output Item Name Date Operation Displays the date in the yyyy mm dd format Time Displays the time in the hh mm ss msec format Host name Displays the name of the host on which the command was executed Type Displays the function type VOL XXX Common function SC XXX Snapshot function RPL XXX Data replication function PC XXX WORM function EC XXX Power saving function Process number thread number Displays the number of the process number of the thread that executed the command The process number may be up to 10 decimal digits in length The thread number is displayed only on Windows Error level 10400422 002 02 2013 Displays the error level 2013 Overland Storage Inc lt 4 6 10 SnapSAN S3000 S5000 Compliance WORM User Guide Item Name Operation Command type Displays the command type Message ID Displays the message ID Message text Displays the message text Outline of the command trace file e Location of the command trace file The command trace file is created under installation folder etc e Size of the command trace file Up to five generations of files are created each being 200 KB in size by default The file size and the number of generations can be changed by modifying the relevant environment variables e Name of the command trace file e iSM_Log log Latest command trace file e iSM_Log n log
259. ollowing confirmation dialog box 0 Is it OK te suspend monitoring of the disk array to start Snapshot Pererve Area Dind res ie Figure 5 23 Confirmation Dialog Box Clicking Yes starts binding a snapshot reserve area The Completion screen is displayed when the processing completes Back button Returns to the Snapshot Reserve Area Bind screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends 10400422 002 02 2013 2013 Overland Storage Inc lt 5 37 SnapSAN 3000 S5000 Snapshot User Guide Advanced Settings Figure 5 24 Advanced Settings In this screen the detailed settings for a logical disk to bind are specified Specify a threshold by the ratio or capacity Specify the threshold for the snapshot reserve area as follows Ratio Specify the threshold as the ratio to the snapshot reserve area capacity Capacity Specify the threshold as the capacity of the snapshot reserve area When the snapshot usage exceeds the specified threshold a warning is issued to iSM 10400422 002 02 2013 Logical Disk Number Specify the disk number for the snapshot reserve area A free number after the displayed number is allocated Logical Disk Name Specify a snapshot reserve area name The logical disk name must be unique within the disk array no other logical disk must have the same name The default valu
260. om the operating host Not Ready Indicates the volume cannot be operated from the operating host Not Available Indicates the volume cannot be operated from any host Base volume unit list link volume The link volume display area of the base volume unit list displays the information about the items described below Double clicking an item displays the Connection screen Type Indicates the volume type Icon Description Lv j a Represents a link volume LV LV Number Displays the logical disk number of the link volume in hexadecimal LV OS Type Indicates the OS type of the link volume For information about the displayed type refer to BV OS Type in 8 Base volume list LV Logical Disk Name Displays the logical disk name of the link volume Partition Name Displays the name of partition to which the link volume belongs This column is not displayed for disk arrays for which VirtualStoragePartitioning has not been purchased DV Number Displays the logical disk number of the destination volume DV in hexadecimal This item is shown when there is a volume link DV OS Type Indicates the OS type of the destination volume DV This item is shown when there is a volume link For information about the displayed type refer to BV OS Type in Base volume list 10400422 002 02 2013 2013 Overland Storage Inc lt 5 22 SnapSAN 3000 S5000 Snapshot User Guide DV Logical Disk Name Displays the log
261. ommand Storage Manager Volume List and Difficulty Information Gather from Programs All Programs for Windows Server 2003 3 Confirm that the iSMvolgather directory is created under the installation directory when the storage destination directory is not changed or under the specified directory when it is changed and obtain the files under that directory 10400422 002 02 2013 2013 Overland Storage Inc 44 22 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault Operations when the Configuration is Changed It is necessary to recreate the volume list to reflect the new configuration information to the volume list when you change the disk array or server OS configuration Conditions Requiring Volume List Update Be sure to recreate the volume list after changing the following configurations e Change of disk array configuration e Change of disk array name e Change of logical disk name e Change of logical disk OS type e Adding of logical disk and change and deleting of configuration e Adding and deleting of snapshot generation and link volume e Change of Access Control setting e Adding and deleting of disk array connected by Replication and Mirroring If the disk array configures Replication and Mirroring and the above configurations are changed in the remote side disk array be sure to update the volume list as well Change of server configuration e Adding change and deleting of partition
262. ompliance WORM User Guide Displayed Information The iSMsc_delete command displays the following messages after snapshot data deletion On the Windows system iSMsc_delete InfoiSM19020 iSMsc_delete has nomally terminated BV id_name type Volume Name volume name Path path SV id_name type Generation generation Status snap_status Description ld nams Logical disk name Qpe OS Type volume name Mount pointvolumename path Drive letter or path name mounted to the folder ofthe NTFS volume accessed by users generation SV relative generation number snap_status SV snapshot status On the UNIX system iSMsc_delete InfoiSM19020 iSMsc_delete has nomally terminated BV id_name type Special File speciai file name SV id_name type Generation generation Status snap_status Description Id nams Logical disk name wps OS Type special file name Special file name generation SV relative generation number snap_status SV snapshot status Execution Conditions To perform snapshot deletion the following conditions must be satisfied e The SV corresponding to the target BV is bound in advance e The activity state of the target volume is snapshot active e The activity state of other SVs set in the specified BV is not being deleted restored or prepared for restoration e The target SV is not protected e The target SV is not linked with the LV 10400422 002 02 2013 2013 Overland Storage Inc 46 43 SnapSAN S3000
263. only on the Windows system enables disks to be controlled and operated so as to operate the data replication and snapshot functions on the Windows system Disk operation commands provide functions necessary for Windows disk operation linking with the replication operation commands or snapshot operation commands rather than a function that replaces Windows Disk Management This enables you to conduct operation that is comparable to the operation conducted on UNIX on the Windows system easily File System Flush Command To carry out a file system flush the iSMrc_flush command is used The iSMrc_flush command flushes the file system without unmounting the association of a drive letter and volume and writes the data in the file system buffer which has not been reflected to the disk When you execute this command you can reflect data to the disk without quitting the application This command executes Flush in units of volumes and flushes only Windows file systems so that other volumes or applications handling their own cache control are not affected To flush application data you also need to use the flush process specific to the application Main Options For the iSMrc_flush command the target volume is specified by its drive letter mount point volume name or NTFS folder name Displayed Information The iSMrc_flush command displays the following messages when Flush starts and ends Start message Flush StartYYYY MM DD hh mm s
264. onsistency 10400422 002 02 2013 In a remote desktop environment where Windows Server 2003 or later is running volumes can be used and ControlCommand can be executed from multiple remote desktop environments However to handle a volume by using ControlCommand the volume must be exclusively used Therefore note the following to prevent an unmount command iSMrc_umount from terminating abnormally or automount from causing unexpected data corruption after unmounting the volume e When executing a ControlCommand command do not use a volume being used by another remote desktop e When a volume is being used by a ControlCommand command executed by another terminal service do not reference the volume by using Windows Explorer or an application On a Windows 2000 terminal service client the relationship between the actually specified drive letter and the volume or the volume status might not be acquired correctly or the operations performed for the volume might not be applied to the system Therefore in this case using snapshot or disks is prohibited The difference backup system that operates archive bits is not available for making snapshot data backup copies in a tape unit In the cluster environment install SnapControl in all servers of the operating system and standby system The servers cannot share the environment setting Create the volume list and make the environment setting same for all servers including the control volum
265. ontrol settings Access Control can be set for individual ports or WWNs After setting Access Control restart the system so that each server can recognize the volume Setting for Access Controls requires purchasing the AccessControl For details on the setting procedures refer to the Configuration Setting Tool User s Manual GUD 10400422 002 02 2013 2013 Overland Storage Inc 42 8 SnapSAN 3000 S5000 Snapshot User Guide System Configuration Control Volume Setting A control volume is used when a server issues control I O to the relevant disk array Register one logical disk for each disk array as the volume for issuing I O to that disk array in the volume list The use of a control volume has the following effects A control volume is necessary in the backup server not connected to BV e Operation is possible even when an LV connected to the server or a replication volume RV for the data replication function cannot be accessed from the server operating system due to a snapshot or data replication operation e You can specify BV to view the information from the backup server not connected to BV Logical disks that can be operated from a server by using a control volume are those that are allowed to access the server by the Access Control of a disk array or those that are paired with the logical disks that are allowed to access the server RV or a base volume BV and link volume LV for the snapshot function cannot be
266. operation It is not necessary to update the volume list during operation However if the disk array server OS volume or other configuration is changed it is required to recreate the volume list to reflect the new information Note that an error or inconsistency may occur at execution of snapshot operation command unless the volume list is updated Preparing Volume This section describes volume preparation you have to make before starting operation When using LVM This section describes volume binding and necessary preparations when you use LVM ina non cluster system LVM Configuration Bind the volume group and logical volume on the application server If they are already bound this task is not necessary For details on how to bind the LVM refer to the relevant manuals 10400422 002 02 2013 2013 Overland Storage Inc 42 11 SnapSAN 3000 S5000 Snapshot User Guide System Configuration E Logical Disk BV 2 GB idev sda Volume Group Disk Pool Logical Volume Figure 2 5 LVM Configuration Creating a file system application server Bind a file system used for applications if necessary Bind a file system by entering the following In this example ext3 is used as a file system mkfs t ext3 dev vg01 lvol Creating a generation application server Check that a snapshot generation and link volume have been created for BV Here create a generation so that BV data will be replicated as shown in Figure 1 5
267. ormation Action LV Unconnecting The link volume is not connected The access mode of a link volume connected to the base BV Connecting volume cannot be changed Monitoring Suspended Retry after restarting the monitoring of the disk array Freezing Retry after defreezing the replication function This operation cannot be executed because a restore fault Restore fault occurred in the target link destination base volume This operation cannot be executed because a snapshot SV fault fault occurred in the target link destination base volume 10400422 002 02 2013 2013 Overland Storage Inc 45 96 SnapSAN 3000 S5000 Snapshot User Guide Summary Detail Specific Access Mode Specify the access restriction of the link volume Display Description The volume can be read and written from the operating R W Permit host Read Only The volume can only be read from the operating host The volume is in the Not Ready state and cannot be Not Ready operated from the operating host Not Available The volume cannot be accessed from a business host Clicking the Execute button displays either of the following confirmation dialogs according to the specified access mode 9 08642 Access Mode Change will be executed Has link volume been un mounted from the host Figure 5 100 Confirmation Not Ready i 08600 e will you execute Figure 5 101 Confirmation Other Than Not Ready Execution Condit
268. ot Volume List Figure 5 10 The snapshot volume list displays the information about the items described below Double clicking an item switches the display to the base volume unit list corresponding to the selected item Type Displays the volume type Icon Description Represents a snapshot volume SV sy If the snapshot is released the icon changes to B a If a snapshot fault or SV prepare fault occurred the icon changes to SV Number Displays the logical disk number of the snapshot volume in hexadecimal 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 11 SnapSAN 3000 S5000 Snapshot User Guide SV OS Type Indicates the OS type of the snapshot volume SV Logical Disk Name Displays the logical disk name of the snapshot volume Pool Number Displays the number of the pool to which the snapshot volume belongs in hexadecimal Pool Name Displays the name of the pool to which the snapshot volume belongs PD Type Displays the physical disk type configuring the pool to which the snapshot volume belongs Display Description FC Indicates an FC disk ATA Indicates an ATA disk SAS SED Indicates a SAS SED disk NLSAS Indicates an NLSAS disk BV Number Displays the logical disk number of the base volume corresponding to the snapshot volume in hexadecimal BV OS Type Indicates the OS type of the base volume corresponding to the snapshot volume BV Logical Disk Name Displays t
269. ot velume Cancel Keip Figure 5 41 Link Volume Bind Wizard Select base volumes in which link volumes is bind Multiple base volumes can be selected Base volumes that meet the following conditions cannot be selected Locked A base volume on which configuration setting operation guard is set Next button Proceeds to the Confirmation screen 10400422 002 02 2013 2013 Overland Storage Inc 45 53 SnapSAN 3000 S5000 Snapshot User Guide Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends A link volume cannot be bound if 1024 logical disks exist in the disk array Confirmation Link volume Bind gt Confirmation gt Completion Confirm the settings 0005h 2000000991010010_LVO00 10 0 P0010001 Click Advanced for modifying the defeult settings in the field above Advanced When the settings are OK click Set to start binding the link volume It you want te modify any settings click Back CE Ge oe Figure 5 42 Confirmation Binding a Disk This screen is to confirm the settings about binding a link volume Check whether the displayed settings about link volumes to bind are correct Advanced button Opens the advanced settings screen Set button Displays the following confirmation dialog box Oo Is it OK to suspend monitoring of the disk array to start Link volume Bind res Cie Figu
270. ote Replication a disk array ahead of one layer can be operated remotely but disk array ahead of two or more layers cannot be operated No snapshot of a logical disk that belongs to an Atomic Group ATgroup can be created To create a snapshot of RV MV RV needs to be separated Remote operations cannot be executed while the volume list is created or updated If a server is UNIX remote operations cannot be executed while an iSM only special file is created while the iSMmknod command is executed When a server is Windows the execution account needs to be Administrator s privilege 2013 Overland Storage Inc lt 6 80 overland storage Chapter 7 Binding and Expanding Snapshot Reserve Area The snapshot reserve area is a collection of special logical disks called snapshot data volumes SDVs This area is divided into the management area used by the disk array and the data area used to manage snapshot differences Snapshot reserve area SumofSDV s SDVA0 SD Val SDV n Logical disks Figure 7 1 Structure Snapshot Reserve Area SRA e There is only one snapshot reserve area per pool e The size of the management area is determined by the snapshot volume SV capacity and the number of SDVs as follows e Snapshot volumes SVs bound in the pool require 2 GB of space for about each 8 TB e 1MBof space is required per SDV Some disk array s requires 32 MB Binding from iSM The maximum cap
271. owing confirmation dialog according to the restoration conditions 08220 Restoring will be executed Base volume s contents will be written a generation newer than object snapshot volume is deleted will you execute Has base volume been un mounted from the host m Figure 5 84 Base volume Unmounted Confirmation 08223 Restoring will be executed Base volume s contents will be written a generation newer than object snapshot volume is deleted Will you execute Has base volume been un mounted from the host There is the BY which is a virtual capacity logical E E oe aT TAE Ey SL thal tha I Lan oR Figure 5 85 Base volume Capacity 08222 Restoring will be executed Is it OK to change contents of base volume Has base volume been un mounted from the host c Figure 5 86 Base volume Unmounted 10400422 002 02 2013 2013 Overland Storage Inc 45 85 SnapSAN 3000 S5000 Snapshot User Guide 08224 Restoring will be executed Is it OK to change contents of base volume Has base volume been un mounted from the host There is the BY which is a virtual capacity logical disk Is there enough empty capacity left in the virtual capacity pool that the BY belongs to Figure 5 87 Base volume Capacity Confirmation Execution Conditions To execute the snapshot restoration operation the following conditions must be satisfied e The target snapshot volume is in the active state e Th
272. partition information using a command such as fdisk restarting is necessary After restarting the created partition becomes available Volume Management is Not Performed This section describes volume binding and necessary preparations when you do not use any volume management software such as LVM or VxVM and perform volume management Creating a file system application server Create a file system used for applications if necessary Create a file system by entering the following In this example ext3 is used as a file system in an environment that has Path Manager installed mkfs t ext3 dev dda Creating a generation application server Check that a snapshot generation and link volume have been created for BV idewisda idevisdb Figure 2 9 Without Volume Management 10400422 002 02 2013 2013 Overland Storage Inc 42 15 overland storage Chapter 3 Function This chapter describes basic terms and functions needed for operations using snapshot Application Server Backup Server Disk Array Figure 3 1 Snapshot Components BV Base Volume An original volume from which replication is made SV Snapshot Volume A virtual volume that saves BV image at a certain time by the instruction of snapshot creation The created snapshot volume is accessed using a link volume The snapshot volume cannot be allocated to a server directly A one to one relationship of BV and SV is referred to as a pair
273. pe Mount point volume name Drive letter or path name mounted to the folder of the NTFS volume accessed by users Logical disk attribute Link status of the link volume Displayed only when the attr option is spacified Ifthe target volume is other than the link volume a hyphen is displayed link Linked unlink Not linked Protection state set to the logical disk by the WORM function If the logical disk is not protected or protection information cannot be obtained a hyphen is displayed RO Write protect valid NA Readwrite protect valid RO expired Write protect expired NA expired Read write protact expired Date when WORM fiction starts protecting the logical disk If the logical disk is not protacted or protection information cannot be obtained a hyphen is displayed Date until which the WORM function will protect the logical disk If the logical disk is not protactad or protection information cannot ba obtained a hyphen is displayed pemanent The retention date is set as permanent Modein which the WORM function protects the logical disk If the logical disk is not protected or protection information cannot be obtained a hyphen is displayed normal normal mode secure secure mode strict strict mode Logical disk reinitialization state If reinitialization has not baan performed a hyphen is displayed formatting r e Reinitialization in progress A value indicating the progress of initialization is displayed
274. pleted auto State where SV preparation ended abnormally due to a fault when a large capacity volume was used SV cannot be used to create a snapshot It is necessary to rebind the SV where a preparation fault occurred rebind it by performing generation unbind and generation adding using the SnapSAN Manager client configuration setting function 2013 Overland Storage Inc 43 4 SnapSAN 3000 S5000 Snapshot User Guide No Snapshot State Description 5 Restore preparing Temporary state where restoration preparation is in progress when a large rst preparing capacity volume is used Immediately after restoration is executed the state transits When difference operation is completed the state transits to restoration in progress automatically If a difference operation error occurs the state transits to restoration suspension automatically In this case it is necessary to reexecute restoration from the suspended snapshot because BV cannot be accessed 6 Restoration in Temporary state during restoration progress Immediately after restoration is executed the state transits Then copying rst exec data to BV by restoration is completed the state transits to the snapshot active state automatically 7 Restore suspended State where restoration is suspended due to a restore fault The state is automatically transited due to a fault during restoration BV cannot be accessed and it
275. plication software in the application server e Install the backup software in the backup server e Install the management software in the management server Install the SnapSAN Manager in the management server e Install the SnapControl in the business and backup servers e Install the Snapshots in the disk array From the server where the SnapSAN Manager is installed the SnapSAN Manager snapshot management functions can be executed for disk arrays where the Snapshots has been installed once installation is completed Software Installation SnapSAN Manager Snapshot Management Operating Environment Snapshot Management Server The snapshot management server is included in the SnapSAN Manager For details on the operating environment refer to the installation guide attached to the SnapSAN Manager Snapshot Management GUI The snapshot management GUI is included in the SnapSAN Manager For details on the operating environment refer to the installation guide attached to the SnapSAN Manager Installation SnapSAN Manager Server Installation 10400422 002 02 2013 2013 Overland Storage Inc 42 3 SnapSAN 3000 S5000 Snapshot User Guide System Configuration When you install the SnapSAN Manager the snapshot management server of the SnapSAN Manager server is also installed For details on the installation procedure refer to the installation guide attached to the SnapSAN Manager SnapSAN Manager Server Setting
276. pplication Server Backup Server Tape Device see Disk Array BV Base Volume Replication sourcevolume lt Sv Snapshot Volume Replication destinati on volume i 1 LV Link Volume Virtual volume for accessing BY or SV Figure 1 1 Snapshot Overview Logical Fault and Physical Fault A replication volume created by the snapshot function has the following features e Ttis a virtual volume holding only the differential data block with a copy source volume e It shares the data block other than the difference with a copy source volume Therefore the snapshot is affected differently depending on the fault type 10400422 002 02 2013 2013 Overland Storage Inc 41 1 SnapSAN 3000 S5000 Snapshot User Guide Logical and Physical Fault Logical and Physical Fault Logical Fault It indicates a fault that unintended and invalid data is written to the business volume due to an operation error or an application fault Overwriting data or deleting necessary files mistakenly garbled data due to application fault etc are the cases A logical fault is caused not by hardware fault but by human error or software problem When a logical fault occurs in the copy source business volume copy destination snapshot is not influenced You can restore the business volume by using the snapshot created before the fault occurred Physical Fault It indicates a fault that data of the business volume is destroyed due to a hardw
277. pshot To delete a snapshot the following conditions need to be satisfied 10400422 002 02 2013 2013 Overland Storage Inc 43 13 SnapSAN 3000 S5000 Snapshot User Guide e The relationship between the BV and SV to be operated is established e The activity state of the BV and SV to be operated is in the snapshot active state e The activity state of other SVs set to the BV to be operated is not being deleted restored or prepared for restoration e Guard is not set to the SV to be operated e A link is not set between the SV to be operated and LV e Ifpair setting is made to the BV to be operated as replication MV the replication state is not Replicate Preparing Restore Preparing or Separate Preparing e The disk array is not in the freeze state Setting Releasing a Snapshot Guard Classification This function sets or releases the guard for a snapshot image created in SV Setting a guard classification to a specific snapshot enables you to guard the necessary snapshot data Past snapshots are deleted automatically during the operation of snapshots cyclic creation Therefore if you use a specific snapshot for test operation or other operations you need to guard the necessary snapshot data Setting guard mode to SV enables the SV not to be used for cyclic use If the SV guard classification is set since SV snapshot data is guarded no snapshot can be created and deleted 3rd generation i Backi time 1 Figure 3 13 G
278. r Machine Connected to SV LV When the server connected to SV LV has gone down SV LV may not be recognized from the operating system after restarting the server This may occur when the server is restarted while the SV LV is placed in the Not Ready unavailable for read or write state by the unset link or unmounting using the iSMrc_umount command In this case you must make the operating system recognize SV LV This section describes how to do this 1 Starting server Start the server that has been down 2 Setting a link If a link is released execute the following command iSMsc_link lv lv001 lvflg ld sv bv001 1 svflg ld relgen 10400422 002 02 2013 2013 Overland Storage Inc 44 21 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault 3 Recognizing the SV LV again Execute the following command to make the operating system recognize SV LV volume iSMrc_scan Depending on when the server goes down you need to reset a driver letter After executing the command above check the volume list and reset the SV LV drive letter that was set before the restart You can reset a drive letter on the Disk Management screen or by executing the iSMrc_mount command 4 Unmounting a volume and releasing a link After recognizing the disk execute the following operations to return to normal operation Wring data to the file system buffer iSMrc_flush mvol Volume 37d84cca 2507 11d5 a0 7 00004c714491
279. r display the volume list with GUI use the Volume List Display screen The following is the layout of the Volume List Display screen j gt H Volume List Display ii Ble yew Operation Help a gt Bae CA ee va vii viie aige Gado aie Abadi Gav Gav vije avi d ue Oh h 200000 2000000 IV SAS k3 07h 0007h 200000 2000000 IV SAS k gt oeh 00Sh 200000 2000000 M SAS Gh 060h 0050h 200000 2000000 MV SAS d k Sih Sih 200000 2000000 M sas k 0S2 0S2 200000 2000000 IV SAS k 053 0053h 200000 2000000 MV SAS I Oh Meh ctet S230033 WV FC ki h 0h ctes S203 V FC kis 005 O013h etes 523003 RV FC WAVokanel d k13 Control Oh 0h test S203 WV Fe K WAVokmel dki Oth Oh ctes 523003 MV FC Figure 6 6 Volume List Display 10400422 002 02 2013 2013 Overland Storage Inc 46 24 SnapSAN S3000 S5000 Compliance WORM User Guide Title bar Displays the title of the Volume List Display function Menu bar For details on each item of the menu bar refer to Menu Item List Toolbar buttons Toolbar Button Description e Clicking this button has the same effect as selecting Create Update Volume List from the menu Create Update Volume List Clicking this button has the same effect as selecting Define Control Volume from the menu Define Control Volume I Clicking this button has the same effect as E selecting CSV Outpu
280. r its contents revealed to others except to meet the purpose for which it was delivered It is understood that no right is conveyed to reproduce or have reproduced any item herein disclosed without express permission from Overland Storage Overland Storage provides this manual as is without warranty of any kind either expressed or implied including but not limited to the implied warranties of merchantability and fitness for a particular purpose Overland Storage may make improvements or changes in the product s or programs described in this manual at any time These changes will be incorporated in new editions of this publication Overland Storage assumes no responsibility for the accuracy completeness sufficiency or usefulness of this manual nor for any problem that might arise from the use of the information in this manual 10400422 002 02 2013 2013 Overland Storage Inc lt overland 2 Storage Preface Snapshot is software for creating replication snapshot image at high speed and low cost on a logical disk basis For snapshot data only the differential data in the replication source logical disk is retained in storage Therefore you can maintain snapshot images with less capacity than the replication source logical disk and use the replication volume at low cost Snapshot provides basic functions to extend online operation time and support 24 hour operation for 365 days such as processing data efficiently that increases day
281. r state e Paring the control volume as RV e Specifying the control volume as a base volume BV by adding a h snapshot generation e Making the control volume usable from the server by building a link volume LV with the same logical disk number as for the control volume e Making the control volume unusable from the server by canceling access control or unbinding the volume Making unrecognizable the disk array to which the defined control volume belongs For details on the necessary measures refer to 4 6 3 9 Volume Name Displays volume names in the volume list file Disk No Displays physical disk numbers in the volume list file Volume Definition Displays the identification information of control volume definition LUN Displays logical unit numbers in the volume list file LDN Displays logical disk numbers in the volume list file LD Name Displays logical disk names in the volume list file Disk Array Displays disk array names in the volume list file Type Displays the type volume attribute of volumes regarding data replication and snapshot by obtaining from a disk array PD Type Displays PD Type information in the volume list file Display Description FC Indicates that the physical disk type is FC ATA Indicates that the physical disk type is ATA SAS_ Indicates that the physical disk type is SAS 10400422 002 02 2013 2013 Overland Storage Inc 46 26 SnapSAN S3000 S5000 Compliance
282. racters in Volumes Characters displayed in a volume indicate the attribute of the volume Attribute Description BV Base volume MV Master volume RV Replication volume Volume that pairs RV further as MV and has both the RV attribute and RV MV the MV attribute 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 100 SnapSAN 3000 S5000 Snapshot User Guide Attribute Description Volume that pairs BV as MV and has both the MV attribute and the BV MV BV attribute Volume that pairs CV as MV and has both the MV attribute and the CV MV CV attribute Volume that pairs BV as RV and has both the RV attribute and the BV RV BV attribute Volume that pairs BV as RV MV and has the MV attribute the RV RV MV BV attribute and the BV attribute Snapshot volume If snapshots are cancelled due to SRA capacity shortages E is SV displayed at the lower right of the volume LV Link volume Status Description In the pair connected by Replication and Mirroring the remote disk array is not managed by SnapSAN Manager or in a monitoring stop may be displayed Not managed like the above Not managed In the pair connected by Replication and Mirroring when Remote Volume cannot be recognized from the host computer which Local Volume has connected by having performed Forced Unpair to Remote Volume or when Forced Unpair is performed to a single side of a pair of Volume Cloning by the ReplicationCon
283. ray where the operating mode from the system is set to secure mode and the link destination disk array e The logical disk must be registered in the volume list e The volume that makes a pair with the target logical disk must be registered in the volume list e The volumes in the upper or lower pair for the target logical disk must be registered in the volume list e Ifthe target logical disk is the BV base volume SV snapshot volume or LV link volume of the snapshot function the BV or the LV associated with the BV or SV must be registered in the volume list e The target logical disk is not locked by operation guard setting Notes The following logical disk attributes are not displayed Reserved attribute registered in a reserved group Snapshot data volume SDV of the snapshot function System Volume The attribute of the control volume is displayed when the control volume is bound in a disk array which can identify the control volume attribute The control volume attribute is not displayed when it cannot be obtained from the disk array not recognized by the system indirect for management In addition for a logical disk defined as a control volume on the server the attribute is not displayed Particular Volume Information Display Command The iSMrc_sense command is used for displaying a particular volume information Main Options For the iSMrc_sense command you can specify the following options 10400422
284. re 5 43 Confirmation Dialog Box Clicking Yes starts binding a link volume The Completion screen is displayed when the processing completes Back button Returns to the Link volume Bind screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends 10400422 002 02 2013 2013 Overland Storage Inc 45 54 SnapSAN 3000 S5000 Snapshot User Guide Advanced Settings Figure 5 44 Advanced Settings Link Volume In this screen the detailed settings for a link volume to bind are specified First logical disk number Specifies the number to be allocated to the logical disk Specify disk name There are the following two methods to specify a disk name The disk name is set based on base volume name logical disk name to which generations are added_LV logical disk number When the specified disk name exceeds 16 characters the dialog box to select the portion to be used is displayed The optional disk name is specified When naming a logical disk make sure that the name conforms to the following rules A nonconforming name cannot be set e Length of the namel to 24 characters e Specifiable characters Alphabetical lettersA to Z a to z Case sensitive Numbers 0 to 9 Under bar _ Slash All characters must be 1 byte in size If the attempt to name the logical disk at the time of binding fails a 20 character long logi
285. ring interval 1 to 30 seconds integer number can be specified The default value can be specified by SNAP_WATCHDEYV in the operation option setting file for Windows and environment variable SNAP_WATCHDEYV for UNIX Monitoring tlme Limit of Snapshot State limit 10400422 002 02 2013 Specify the monitoring time limit for monitoring the snapshot state in seconds If the waiting does not complete before the specified time has elapsed since the waiting start time the waiting is terminated abnormally e Specification of time limit second The value the number of seconds specified in second indicates the monitoring limit time 0 to 86400 seconds integer number can be specified e No limit limit nolim The waiting is performed unlimitedly The default value can be specified by SNAP_LIMWATCHDEYV in the operation option setting file for Windows and environment variable SNAP_LIMWATCHDEV for UNIX 2013 Overland Storage Inc lt q 6 48 SnapSAN S3000 S5000 Compliance WORM User Guide Displayed Information The iSMsc_wait command outputs the following messages during the snapshot status waiting and on completion of the waiting On the Windows system Message during execution Waiting Message on completion iSMsc_wait Info iSM19050 iS Msc_wait has normally terminated BV uid_name type Volume Name volume name Path path SV ld_name type Generstion generation Status snap_status YY YY MM DD hh mm ss Descrip
286. ring state To check the progress of the restoration process or whether the restoration is completed close the execution dialog and return to the snapshot management screen 10400422 002 02 2013 2013 Overland Storage Inc 45 86 SnapSAN 3000 S5000 Snapshot User Guide Guarding a Snapshot Guard a snapshot held in a snapshot volume The function guards the snapshot against the snapshot creation and deletion operations Also the guarded snapshot is excluded from the snapshot cyclic creation operation Display the Snapshot Guard screen using one of the following procedures e Select a snapshot volume from the information list display area Then from the menu bar of the snapshot management screen select Operation Snapshot Operation Snapshot Guard e Select a snapshot volume from the information list display area Then right click on the mouse and select Snapshot Guard Snapshot Guard Active 003eh Active 003 fh Active 0040h Choose volume which you want to execute from list then click Execute button It is possible that multiple volumes are chosen and executed Figure 5 88 Multiple Volume Execute From the list select the snapshot volume whose snapshot you want to guard and then click the Execute button You can specify two or more volumes at a time and execute the operation for all of them simultaneously Unexecutable volumes cannot be selected Selected Volume List This part of the screen di
287. rive letter of the BV or remounting the BV in the NTFS folder fails for some reason If resetting the drive letter for BV or mounting the BV in the NTFS folder fails recovery e g resetting of the drive letter or remounting of BV into the NTFS folder is necessary for restarting operation The following describes the recovery procedure 10400422 002 02 2013 2013 Overland Storage Inc 44 18 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault 1 Collecting volume information If a server has failed restart it by following the procedure in Down of Server Machine Connected to SV LV Collect the volume information drive letter and mount point volume name of the BV that was to be restored To collect the volume information of the BV confirm the execution results that are output to the event log command trace or the batch file execution result 2 Resetting the drive letter and remounting BV into the NTFS folder Start Disk Management According to the collected BV volume information drive letter and mount point volume name operate the volume with Change Drive Letter and Path to set the drive letter and mount the BV with the NTFS folder path name specified You can also set the drive letter and mount the BV in the NTFS folder by entering the MOUNTVOL command through the command prompt Example of setting a drive letter To set the drive letter H for the volume under the mount point volume name
288. rve area capacity is a certain percentage of the target base volume multiplied by the number of generations Example When assuming 30 Base volume capacity10 GB Number of snapshot generations4 SRA capacity10 GB x 30 x 4 generations 12 GB 10400422 002 02 2013 2013 Overland Storage Inc 45 39 SnapSAN 3000 S5000 Snapshot User Guide e The snapshot reserve area can be expanded after binding free pool space is required Adding a Snapshot Generation The work of adding a snapshot generation is done using the Generation Addition screen in the wizard format as follows Generation Addition A volume to which snapshot generations are added is selected Confirmation Snapshot data volumes to bind are displayed Check whether the settings are correct Advanced Click this button to make detailed snapshot volume settings Completion The generation addition result is displayed Generation Addition 0000h 20000009910100100009 10 0 g coon 20000009910300100003 10 0 a enapehot generation specify the mader o selected bare volume maber z t Figure 5 26 Generation Addition Wizard Start Select volumes to add generations form the volume list Select volumes to which snapshot generations are added from the list Adding a snapshot generation to a volume that does not have any snapshot generation causes that volume to become the Base Volume BV Logical disks that meet any of the following condit
289. rvice ESMCommonService specify as shown below NET START ESMCommonService If sharing of the folder was cancelled in Step 1 1 specify the sharing again If sharing was not cancelled in Step 1 1 it is not necessary to execute the following Example Sharing of shared folder NET SHARE share_name drive_letter path To enable the sharing of the folder bv_folder1 specify as shown below NET SHARE by_folder1 G bv_folder1 Operation Procedure test server 10400422 002 02 2013 1 Setting a link between LV and SV test server To access a snapshot set a link between LV and SV Setting a link enables access to SV depending on the access restriction specified at setting a link iSMsc_link lv 1lv001 lvflg ld sv bv001 1 svflg ld relgen 2 Mounting LV test server To link LV SV to the file system mount LV SV When you specify a drive letter or an NTFS folder name in the mount command line together the drive letter or the NTFS folder name is reset automatically after LV is mounted iSMrc_mount mvol Volume 37d84cca 2507 11d5 a0f7 00004c714491 drv H Accessing a snapshot test server Access a snapshot from a test operation to execute a test After the test is completed and the target volume is not accessed anymore proceed to the next step Flushing LV file system test server Flush the LV SV file system to write unwritten data in the buffer of the file system to a disk iSMrc_flush drv H Unmo
290. ry installed If the maximum value is exceeded an error message is displayed e The snapshot volume capacity cannot be expanded e Ifthe attribute of a snapshot volume is SV after a binding attempt it indicates that the binding of a snapshot has failed for some reason Confirmation Click Advanced for modifying the default settings in the field above Advanced Cry 2000000991010010 89009 40 0 Snapshen 0000h 20000 coosh 2000000991010010_2 9004 10 0 Snapshot 0000h 20000 It you want te modify any settings click Bac ES ee ose Figure 5 27 Confirmation Generation Addition This screen is to confirm the generation addition Check whether the displayed settings about snapshot volumes to bind are correct Advanced button Opens the advanced settings screen Set button Displays the following confirmation dialog box fi Is 20 OK to suspend ponitorisg of the disk array to stert Snapshot generation addition Tes CEs Figure 5 28 Confirmation Dialog Box Clicking Yes starts binding a snapshot volume The Completion screen is displayed when the processing completes Back button Returns to the Generation Addition screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends 10400422 002 02 2013 2013 Overland Storage Inc lt 5 42 SnapSAN 3000 S5000 Snapshot User Guide Advanced Settings
291. s disk_numberld_nametype volume_name path End message Flush Normal EndYYYY MM DD hh mm ss disk_numberld_nametype volume_name 10400422 002 02 2013 2013 Overland Storage Inc lt 4 6 71 SnapSAN S3000 S5000 Compliance WORM User Guide path Description YYYY MM DD hh mm ss Start End time Year Month Day Hour Minute Second disk_number Physical disk number ld_name Logical disk name type OS type volume_name Mount point volume name path Drive letter or path name mounted on the NTFS volume folder accessed by users Execution Conditions To perform Flush the following conditions must be satisfied e The target volume is registered in the volume list e The target volume is in the Read Write available state e A dynamic disk cannot be selected e The specified file system is mounted e This command flushes only the Windows file systems so that the data of applications handling their own cache cannot be flushed To flush application data to the disk you need to flush application data first and then execute the Flush command to flush the file system e The update prevention state of the operation target volume is not Prevent by the volume update prevention function Volume Mount Command To carry out a volume mount the iSMrc_mount command is used The iSMrc_mount command associates volumes of each partition with file systems Mounting allows volumes to be used as file systems local disks such as C and D
292. s are shown below e For a link volume and a snapshot volume Display of Link State The link states oflink volumes are shown below Fora link volume anda snapshot volume Connected Not connected Fors link volume anda base volume Connected Differential Quantity of Volume Transfer Rate Displays theamount of differance and transferrate during copy operation The unit of the amount of difference is variable e z KB MB GB and the unit oftramsfer rate is fixed MBS Ee Amount of Difference Transfer Rate in enor Aarin gt pe a a After Restore is complete When Restore is complete Amount of Difference 0 Amount of Differenceand Transfer Rate MB S disappears Figure 5 106 Link State Display 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 104 SnapSAN S 3000 S5000 Snapshot User Guide Copy Progress Displays theprogress of Restore and Replicateas the change in volume Example of Display Restore Restoring StorageS2800 1 StorageS2800 1 0014h N LDM_28_1_0 0015h WN LOR_28_1_1 39 1 25 GB 15 07MB S r Restore Is Complete StorageS2800 1 StorageS2800 1 0014h N LDM_28_1_0 0015h WN LOR_28_1_1 Returns to the original colorwhencomplete Figure 5 107 Copy Progress 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 105 SnapSAN 3000 S5000 Snapshot User Guide e When BV is selected Snapshot Cyclic Creation _ wm Creatines
293. s omitted inconsistency may occur between cache and volume upon separating again which may result in destruction of file system On backup server Primarily temporarily halt the operations on the SV LV and flush the cache data and unmount the SV LV using the commands provided by snapshot operation to release the association between the file system and disks If the operations are not halted unmounting SV will fail Restoring file system If BV snapshot is created without releasing association between file system and disk on volume used on BV access to volume on SV LV may result in displaying an error message and use of SV LV may be disabled In such a case execution of CHKDSK command on the accessing volume removes file system inconsistency Refer to CHKDSK help before using the CHKDSK command Access Right Settings on Volumes Access right settings on folders and files in volumes used in BV or SV LV are reflected on SV or BV after snapshot creation or restoration and existing access right settings are overwritten If the overwritten access right settings are different from existing settings the access to folders or files used before may be disabled Therefore access right settings on folders or files must be specified the same on BV and SV LV servers Control Volume A control volume is used when a server issues control I O to the relevant disk array Select one logical disk for each disk array as the volume for i
294. s specified Information on control volumes as shown below is listad Control Volume List Disk No LDN Disk Array Name disk_num kin disk_aray_name Description disk_num Physical disk number ldn Logical disk number disk_amay_name Disk amay name 2013 Overland Storage Inc lt 4 6 15 SnapSAN S3000 S5000 Compliance WORM User Guide vi vii 10400422 002 02 2013 When the p option is spacified Property information of the volume list as shown below is listad Property of Volume List File Version version Crested YYYY MM DD hh mm ss Owner Host Name host_nsme Disk Array disk_smrsy_number Volume Information volume_number Description version Version of the iS Mvollistcommand usad to create the volume list YYYY MM DD bh mm z Date when the volume list is crested or updated host_name Host name of the server owning the volume list disk_anay_ number Total number of disk arrays in the volume list volume number Total number of volume information items in the volume list When the ax option is spacified Disk amay information information on comespondence and configuration of logical disks and propaty information of the volume list are listad as shown below Volume List iSMvollist Version X XJOX Date YYYY MM DD HH MM SS Disk Array List Disk Array Name Number of Drives disk_srmsy_name number Volume List Volume List iSMvolist Version X X JOX LDN LD Name VAA OS Type HB
295. s to be unbound are correct Set button Displays the following confirmation dialog box wo Is it OK to suspend monitoring of the disk array to start Link volume Unbind res ie Figure 5 59 Confirmation Dialog Box Clicking Yes starts unbinding link volumes The Completion screen is displayed when the processing completes Back button Returns to the Link volume Unbind screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends 10400422 002 02 2013 2013 Overland Storage Inc 45 66 SnapSAN 3000 S5000 Snapshot User Guide Completion iy Link volume Unbind Link volume Unbind gt Confirmation gt Completion Oo Link volume unbinding succeeded Click a following link if necessary Unbind another link volume Delete generati ons Click Finish to exit Monitoring of the disk array resumes Figure 5 60 Completion The link volume unbinding result is displayed When the processing succeeded the following links are displayed Unbind another link volume Opens the Link volume Unbind screen to unbind another link volume Delete generations Opens the Generation Deletion screen Finish button Returns to the monitoring screen A logical disk which was bound as a link volume cannot be unbound if it meets any of the following conditions Condition assign FC Description
296. secure snapshot reserve area with enough spaces Operating Snapshots This section describes snapshot operation Binding a Snapshot Volume This function creates and allocates the necessary number of SVs to save BV snapshot images SV is bound by the SnapSAN Manager configuration setting function SV is created by specifying BV for a snapshot creation and the necessary generation number Up to 16 SVs can be defined for one BV The logical disk specified as BV can exist either in a basic pool or a dynamic pool The pool where SV is created however must be a dynamic pool In the pool where SV is created the snapshot reserve area needs to be created beforehand You can change the number of SVs that were created after binding SVs When a snapshot fault occurs it is necessary to rebind the SV LV and SRA SDV When a SV prepare fault occurs the faulty SV cannot be used to create a snapshot Therefore it is necessary to rebind the SV by using the SnapSAN Manager Client configuration setting function Creating a Snapshot This function specifies SV paired with BV and creates the BV snapshot image at that time in SV After a snapshot is created since SV keeps accumulating differential information of BV SV always retains the image generated when the snapshot is created A created snapshot can be accessed via a link volume If data of the generation to be created is available a snapshot is created after data is deleted A snapshot is
297. shot operations must have the same type of partitions and file systems If these rules are not observed data consistency is not guaranteed Use the same type of partition and file system for BV and SV LV 10400422 002 02 2013 2013 Overland Storage Inc lt 4 A 2 SnapSAN 3000 S5000 Snapshot User Guide Snapshot Access Restriction Selection Windows System Selection The same Windows OS must be installed in the application server using BV and the backup server using SV LV For example if the application server uses Windows Server 20038 the backup server must also use Windows Server 2003 However there is no problem in using the application server and backup server if the applied service packs Windows Server 2003 Windows Server 2003 R2 editions Standard Edition Enterprise Edition and platforms A32 EM64T or IA64 are different Disk Signatures A disk signature is the disk identifier that is written in the header block of the disk when it is referenced for the first time by Disk Management Windows The Windows system does not allow using two or more disks with the same signature in the same system The snapshot function performs the following signature control for pairs of volumes whose OS type is WN used on a Windows system e A signature is restored to the one before copying during restoration e While a link is set the SV signature is saved in SV and the signature controlled by LV is written to SV e Whil
298. sk disk array side v v Creation Display information with system dependent information Server side and displays 1 the associated information iSMsc_create Snapshot creation Creates a snapshot SV v v 2 iSMsc_restore Restoration from Restores from a snapshot SV v v snapshot 3 10400422 002 02 2013 2013 Overland Storage Inc 46 1 SnapSAN S3000 S5000 Compliance WORM User Guide No Command Name Operation Description Target System Windows UNIX iSMsc_delete Snapshot deletion Deletes snapshot SV data v v 4 iSMsc_svguard SV guard Sets or cancels SV guard classification v v classification setting cancellatio 5 n iSMsc_wait Snapshot state Waits for the specified snapshot SV v v 6 wait state iSMsc_query Snapshot Displays snapshot information v v information display 7 iSMsc_link Link setting Sets a link between a link volume LV v v 8 and BV SV iSMsc_unlink Unlinking Unlinks between a link volume LV and v v 9 BV SV iSMsc_linkinfo Link information Displays link related information v v display 10 iSMrc_sense Volume List Displays volume information v v Display 11 iSMrc_ldlist Logical disk Obtains and displays logical disk list v v information information display 12 iSMrc_flush File system buffer Flushes the file system cache buffer v flush 13 iSMrc_mount Volume Mount Mounts a volume file system v 14 iSMrc_umount Volume Unmount Unmounts a volume file system
299. so forth Figure 1 1 shows an example of hardware configuration LAN Application Server Figure 2 2 Hardware Configuration e To utilize the snapshot function most efficiently it is better to separate application servers which process tasks from backup servers Thus tape backup operation gives no additional load to application servers In the environment using VxVM it is not possible to operate BV and a snapshot on the same server Therefore the application server used for operations should be different from the backup server In the environment using LVM it is possible to operate both on the same server but you need to take care about the procedures for operations e Though the business or backup server may also be used as a management server using a specific management server is recommended Use of LAN connection is strongly recommended for connection with disk array e Connect the path of individual servers to be connected to the disk array to the port of different directors of the disk array limiting the servers to be accessed by Access Control Software Configuration Select software to be used according to the hardware components operating conditions etc is shown in software configuration example 10400422 002 02 2013 2013 Overland Storage Inc 42 2 SnapSAN 3000 S5000 Snapshot User Guide System Configuration Client Management Server Figure 2 3 Software Configuration e Install the business ap
300. splays a list of the information about the snapshot volume selected from the information list display area If Unexecutable is shown in the Execution Result field the volume does not meet the execution conditions and therefore cannot be selected If there is any unexecutable volume refer to the Unexecutable Information and take one of the following actions 10400422 002 02 2013 2013 Overland Storage Inc lt 5 87 SnapSAN 3000 S5000 Snapshot User Guide Unexecutable Information Action Execute the operation for a snapshot volume whose Snapshot Inactive snapshot state is active Execute the operation for a snapshot volume whose Snapshot Deleting snapshot state is active SV Guard The snapshot is already guarded Monitoring Suspended Retry after restarting the monitoring of the disk array Freezing Retry after defreezing the replication function This operation cannot be executed because a restore fault Restore fault occurred in the target base volume This operation cannot be executed because a snapshot SV fault fault occurred in the target base volume Execute the operation for a snapshot volume whose SV Preparing snapshot state is active Execute the operation for a snapshot volume whose SV Prepare Fault snapshot state is active Summary Details Clicking the Execute button displays the following confirmation dialog P 08600 sf Will you execute Figure 5 89 Execute Execution Co
301. ssuing I O to that disk array and register the volume in the volume list Prepare one control volume for each server It is not advisable to use the same logical disk as the control volume from different servers To register a control volume use a normal volume that is not used for data replication and snapshot Keep the volume assigned as a control volume as a dedicated volume and do not assign business data to the volume For a logical disk used as a control volume the RAID format and capacity are not limited You can build a small capacity logical disk dedicated for a control volume 10400422 002 02 2013 2013 Overland Storage Inc lt 4 A 6 SnapSAN 3000 S5000 Snapshot User Guide Snapshot and Data Consistency Start of Sever Connected to SV LV When SV is unlinked and LV is unmounted by iSMrc_umount command SV LV may not be recognized by the operating system after starting the server with SV LV in the Not Ready unavailable for read or write state In this case you must make the operating system recognize SV LV This section describes how to do this 1 Starting server Start the server On Windows Server 2003 use the MOUNTVOL command provided by the operating system at system startup to disable automatic volume mounting before operation To disable automatic volume mounting specify the N option and execute the MOUNTVOL command as follows MOUNTVOL N For details on problems with automatic volume mounting refer to
302. st Properties Version Displays the version information of the SnapSAN Manager Volume List used to create the volume list Created Displays the date when the volume list was created Owner Host Name Displays the host name of the server owning the volume list Disk Array Displays the total number of disk arrays in the volume list Volume Information Displays the total number of volume information items in the volume list View Hide Toolbar To select whether to view or hide the toolbar specify View Toolbar E volume List Display Eile View Operation Help ae ERa DiskanaySubsystem far t i S O O OO O CS Figure 6 15 Viewing Toolbar Fil volume List Display olx Eile view Operation Help Figure 6 16 Hiding Toolbar View Hide Status Bar To select whether to view or hide the status bar specify View Status Bar 10400422 002 02 2013 2013 Overland Storage Inc lt 6 32 SnapSAN S3000 S5000 Compliance WORM User Guide VOLUME 13 7 Figure 6 17 Viewing Status Bar Figure 6 18 Hiding Status Bar Updating Display Information To update the information of the volume list file select View and then select Update Display Information on the Volume List Display screen The volume list file contents are updated and the Volume List Display screen is automatically refreshed Type and Pair disk Destination volume List are acquired from the disk array and displayed ag
303. stomer_DataBase LV FC M Volume cce8 986f 4d87 1 1d8 92 a3 806d617 2696F disk10 000h 0004h LD0004_MV S 2800 MV FC RV 0011h LD0011_RV1 S2800 RV 0012h LD0012_RV2 S2800V RV 0013h LD 0013_RV3 S2800 Figure 6 13 CSV Output This file outputs information displayed on the Volume List Display screen by separating each piece of information by commas The information for a volume is output as information for a line The information on the logical disks displayed in the Pair disk Destination volume List is output in the following format Information items on multiple logical disks are delimited and linked with slashes and output Type LDN LDName DiskArray PDType Type LDN LDName DiskArray PDType Type Type LDN Logical disk number LD Name Logical disk name Disk Array Disk array name PD Type PD Type Displaying Property Information of Volume List To check property information of the volume list select File Properties on the Volume List Display screen 10400422 002 02 2013 2013 Overland Storage Inc lt 6 31 SnapSAN S3000 S5000 Compliance WORM User Guide To display property information select File Properties on the Volume List Display screen To return to the Volume List Display screen click the Close button iSM Version 52001 Created 2007 07 02 09 40 45 Owner Host Name DBSV5800 Disk Array gt a Volume Information 10 a a Figure 6 14 Volume Li
304. system buffer of the specified volume thoroughly When access is made to the file system of the unmounted volume the Windows system mounts the volume automatically When the Windows system mounts a volume automatically unmount operation is disabled If unexpected data is left in the file system buffer due to this operation the file system may be damaged To inhibit the unexpected automatic mount use the offline option When the offline option is specified the mount point drive letter or NTFS folder name set in the target volume is deleted automatically and the volume is unmounted with automatic mount inhibited At this time Windows 2000 changes the access restriction of the disk logical disk to the Not Ready state If the offline option is omitted when the volume to be unmounted is LV it operates in the same way as the offline option is specified When the volume to be unmounted is RV it operates in accordance with the UMOUNT_RVACC parameter setting of the replication operation option setting file For information about the replication operation option setting file refer to the ControlCommand Command Reference Main Options For the iSMrc_umount command the target volume is specified by its mount point volume name drive letter or NTFS folder name The following option can be specified e Forced Unmount force Even when the volume to be unmounted cannot be locked it is unmounted forcibly e Deleting Mount Point offl
305. t 10400422 002 02 2013 2013 Overland Storage Inc lt q 6 33 SnapSAN S3000 S5000 Compliance WORM User Guide Other Disk Arrays It is necessary to use this function to define the control volume Refer to the following operating procedures In disk arrays with which the control volume attribute can be identified the logical disk that is bound as a control volume is not displayed on the control volume definition screen it cannot be added changed or deleted To display the Define Control Volume screen select Operation Define Control Volume from the Volume List Display screen Define Control olume x r Selected Volume List Disk No LUN LON OSType LD Name DiskAnay ead ag pore m Candidate Volume List dsk OMh o005h WN LOCAL DATAT Tokyo_Customer IV Sdsk3 002h 0006h WN LOCAL_DATA2 Tokyo_Customer IV Figure 6 19 Define ControlVolume Display items on the Define Control Volume screen are described below Selected Volume List Lists already registered control volumes Displays a logical disk selected as a control volume Candidate Volume List Lists candidates of logical disks that can be registered as a control volume Classification of listed logical disks is IV or MV Displays logical disks that can be registered as a control volume When the Define Control Volume screen is started if an error is detected in the saved definition informa
306. t Not Available Indicates the volume cannot be operated from any host 10400422 002 02 2013 2013 Overland Storage Inc 45 26 SnapSAN 3000 S5000 Snapshot User Guide Snapshot volume list per pool mma mns a a format mns nrag Figure 5 15 Snapshot Volume List Pool The snapshot volume list per pool displays the information about the items described below Double clicking an item switches the display to the base volume unit list corresponding to the selected item Type Indicates the volume type Icon Description Indicates a snapshot volume SV oa If the snapshot is released the icon changes to B If a snapshot fault or SV prepare fault occurred the icon changes to SV Number Displays the logical disk number of the snapshot volume in hexadecimal SV OS Type Indicates the OS type of the snapshot volume SV Logical Disk Name Displays the logical disk name of the snapshot volume BV Number Displays the logical disk number of the base volume corresponding to the snapshot volume in hexadecimal BV OS Type Indicates the OS type of the base volume corresponding to the snapshot volume BV Logical Disk Name Displays the logical disk name of the base volume corresponding to the snapshot volume Status Displays the status of the snapshot 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 27 SnapSAN 3000 S5000 Snapshot User Guide Display Description Active Indic
307. t SCSI device One path can handle multiple targets 10400422 002 02 2013 2013 Overland Storage Inc 46 11 SnapSAN S3000 S5000 Compliance WORM User Guide e Target ID Target ID This ID is used for identifying a device that is connected to the SCSI bus One ID is assigned to one disk array Application Server Switch Target ID Bus Disk Array Figure 6 5 Relations between System Configuration and HBT The iSMvollist command corresponds to the system information on the logical disk of the disk array that can be recognized from an application server and saves necessary volume information in the volume list Only the volumes that have already been registered in the volume list can be specified when data replication or snapshot operation is performed Therefore you need to execute the iSMvollist command to create the volume list beforehand When you have added or deleted disk arrays to or from the system or bound or unbound logical disks you must update the volume list to reflect the information If the volume list is not updated inconsistency may occur in data replication or snapshot operation or disk operations such as flushing or unmounting Windows volumes Main Options You can specify one of the following options in the iSMvollist command Create update the volume list cr Scans devices connected to the system and creates or updates the volume list Displays the volume list You can select one of
308. t LD Information LDN h OS Type LD Name Snapshot Attribute Node No h PD Type 0000 NX LD0000 00 FC 0001 NX LD0001 00 FC 0002 NX LD0002 00 ATA Figure 5 116 LD Information Snapshot LD Information Displays a list of information about all logical disks bound to the disk array LDN h Displays the LD number OS Type Displays the OS type of each LD LD Name Displays the arbitrary ID information logical disk name of each LD acquired from the disk array Snapshot Attribute Snapshot attribute which is one of the following BV Base volume volume from which a snapshot is copied SV Snapshot volume volume storing the information used to manage differences in the BV at specific point of time LV Link volume virtual volume linked with a BV or SV to allow indirect access SV One type of snapshot volume that does not have the information used to manage differences in the BV Node No h Displays the node number of the LD 10400422 002 02 2013 2013 Overland Storage Inc 45 114 SnapSAN 3000 S5000 Snapshot User Guide Displaying Snapshot Information PD Type Displays either of the following as the type of the PD configuring the LD FC FC attribute ATA ATA attribute SAS SAS attribute SSD SSD SAS attribute SAS SED SAS SED attribute NLSAS NLSAS attribute Node No h is displayed only for the disk arrays with nodes Tf there is no snapshot LD bound to the disk array the following error message is
309. t can be targets of the function Only an appropriate privileged user super user can create or update the volume list When you have added or deleted disk arrays to or from the system or bound or unbound logical disks you must update the volume list to reflect the information If the volume list is not updated data inconsistency may occur during data replication and snapshot operations Main Options The following option can be specified in the iSMvollist command Creating updating the volume list r It is possible to scan devices connected to the system and create or update the volume list The volume list can be automatically created at the start of the application server However if settings remain unchanged since installation the volume list cannot be automatically created and therefore will need to be manually created To automatically create it it is necessary to change the name of the re file that has been created at the installation Displaying the volume list One of the following options can be selected Option Description d option Lists disk array information option Displays information associated with all logical disks vs option Displays information only associated with specified disk arrays sorted by using special file name as the key If a specific special file name is specified the system displays information only associated with the specified special file vl option Displays informat
310. t displays the information about the items described below Double clicking an item displays the Connection screen Type Indicates the volume type Icon Description aA Represents a base volume BV If a restore fault or snapshot fault occurred the icon changes to Q When the replication function is used the volume attribute of replication is also displayed Display Description BV MV Indicates BV having the MV attribute BV RV Indicates BV having the RV attribute BV RV MV Indicates BV having the RV and MV attributes BV Number Displays the logical disk number of the base volume in hexadecimal BV OS Type Indicates the OS type of the base volume BV Logical Disk Name Displays the logical disk name of the base volume Status Displays the status of the snapshot 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 17 SnapSAN 3000 S5000 Snapshot User Guide Display Description Normal Indicates a state other than below Indicates the state that data is being restored from snapshot Restoring volume to base volume Restore fault Indicates the restore fault state SV fault Indicates the snapshot fault state Link Displays the state of the connection with the link volume Display Description Connection Indicates the link volume connection state Restore Different Value GB Displays the amount of difference caused before restoration is completed This item is shown when th
311. t of Information List from the menu CSV Output of Information List Pair disk Destination volume List Displays the volume information of pair disks set by the data replication function or the volume information of destination volumes linked by the snapshot function for the volume selected on the screen of Volume List Display The information is acquired from the disk array Status bar The following information appears on the status bar VOLUME Displays the number of volume information items to be displayed on the Volume List Display screen If volume information of all disk arrays is displayed the number of volume information items in the volume list is displayed For display by narrowing down disk arrays the number of volume information items of the disk array is displayed Disk Array Selection Combo box Clicking the pull down button displays the list of disk arrays currently registered in the volume list file Drive Letter Path Name Displays path information in the volume list file Icon Description Indicates logical disks that can be used from the server 10400422 002 02 2013 2013 Overland Storage Inc 46 25 SnapSAN S3000 S5000 Compliance WORM User Guide Icon Description ely Indicates logical disks defined as control volumes Indicates that logical disks which were defined as control volumes are in an inappropriate state The following operations can place the control volume in the imprope
312. t operation is performed for the BV connected to a server Direct operation is the most basic operation when the snapshot operation is performed from an application server The BV used for operations is connected to an application server and the LV used for backup and the like is connected to a backup server or others To perform direct operation you need to register the logical disk that is recognized by a server OS and can be accessed in the volume list on each server Backup Server Application Server Lal x 1 I kS kreol N K Ac ssContol Access Control j a Figure 6 2 Direct Operation to BV or SV LV Volume A volume control volume is prepared to issue an I O to a disk array and operation is performed through the control volume Since operation is performed through the control volume an application server or a backup server can operate BV or SV though those servers cannot access BV or SV directly Depending on the access control setting of the disk array however operation can be performed only to the logical disk permitted to access the server or the logical disk that is paired or linked with a logical disk permitted to access the server Register a control volume CV in the volume list in advance as the volume to be used to issue an I O to the disk array Registering a control volume in the volume list in advance eliminates the need for considering the existence of a control volume during oper
313. t the snapshot from being deleted by mistake when another generation used for search operation is created 4 Resume the actual operation 5 Link SV to LV and mount the LV to a server for test operation lt Creating a snapshot for search operation gt Create a snapshot from an application server and access an arbitrary SV from a server for search operation via LV 1 Temporarily halt actual operation and ensure the static point Create a BV snapshot at intervals decided by operation for example once a day Circulation usage of multiple generations SV 2 SV 3 SV 4 SV 2 Resume the actual operation oa fF eS DS Link the SV of the necessary generation to LV and mount the LV to a server for search operation System Configuration The system configuration of snapshot 10400422 002 02 2013 2013 Overland Storage Inc 41 5 SnapSAN 3000 S5000 Snapshot User Guide Backup Operation Application Server Backup Server e Tape Device DiskArray Figure 1 5 Configuration Hardware Configuration To install snapshot for use the following hardware devices are needed e Disk array A disk array on which snapshot Snapshots is installed is needed e Management server client SnapSAN Manager is installed in the management server that monitors disk arrays This server controls disk arrays and the snapshot function e Application server backup server Performs snapshot operation or backup operation in cooper
314. tate Transition 10400422 002 02 2013 2013 Overland Storage Inc 43 3 SnapSAN 3000 S5000 Snapshot User Guide jon completion s_ Incufficie rney o Insufficiency of SRA capacity a ea ee a gt Transition by explicit operation Automatic transition lt lt gt gt Operating state of SV Setting SV Snapshot Restore faut Restore fu Reexec utg restoration Figure 3 4 SV State Transition No Snapshot State SV preparing snap preparing Description Temporary state immediately after SV setting when a large capacity volume is used SV cannot be used to create a snapshot The state transits by the following operation or under the following states Immediately after SV is set Snapshot inactive snap inactive State where a snapshot is deleted SV data is disabled and cannot be accessed by setting a link The state transits by the following operation or under the following states Immediately after SV is set After a snapshot is deleted When SV data is deleted due to insufficient SRA capacity auto 10400422 002 02 2013 Snapshot active snap active SV prepare fault Snap prepare fault State where a snapshot is created SV data is enabled and can be accessed READ WRITE by setting a link The state transits by the following operation or under the following states After a snapshot is created After restoration is com
315. te a snapshot according to the instruction to create a snapshot For guaranteeing data consistency a static point is specified on an application server before snapshot creation Usually a static point is specified by 10400422 002 02 2013 2013 Overland Storage Inc lt 4 A 4 SnapSAN 3000 S5000 Snapshot User Guide Snapshot and Data Consistency temporarily halting operation Oracle and Microsoft SQL Server however provide a function of keeping a static point with operations by database system maintained Separation is possible on such systems without stopping operations Usual file As basic operations first temporarily halt the operations on the BV and flush the BV cache data using the command provided by snapshot operation If unmounting error occurred due to referencing or access from unexpected product writing process is completed after waiting for completion of delayed updating process in several tens of seconds If snapshot is created without writing cache data completely files on the SV may lack file consistency In such a case executing CHKDSK command upon mounting SV LV on backup server restores inconsistent files For planning backup operations check processes and services to be halted Processes to wait for delayed updating must be considered against unmounting errors Oracle Combination of the Oracle standard on line backup function and the snapshot function allows producing backup data even in business operation
316. tered correctly If the batch or other file used for operation describes the logical disks partitions mount point volume names mount points drive letters or NTFS folder names and other information to be operated reflect the updated information in the volume list to that file Note that the snapshot operation command execution may abnormally end in the future operation if the information in the volume list contains an error or if the volume list information is inconsistent with the batch or other file used for operation Invalid Product If the product for snapshot has not been purchased or if it does not match the total physical capacity of the disk array the snapshot does not function properly If the products are not purchased properly the icon on the Snapshot screen tree view changes to indicate missing products or products not purchased For purchased products check disk array Properties in the State Monitoring screen Collecting Information of Error of Unknown Cause When an error whose cause is unknown has occurred and you want to request the provider to investigate the error you must collect information required for error analysis 1 Fault by SnapSAN Manager operation When a fault occurs by SnapSAN Manager operation collect information 2 For SnapControl error Follow the steps below to execute the command and collect the operation trace and other fault information at a time A disk for storing fault information m
317. tes that threshold excess occurred in pool Indicates that the replication function is in the freeze state 00 Component List Indicates that a restore fault snapshot fault or SV prepare fault occurred Number of Elements Bv 65 Base volume lan Snapshot volume Figure 5 8 Component List The component list displays the information about the items described below Double clicking an item switches the display to the list one level below the currently displayed one Type Displays the type of the volume collection Icon Description Represents a collection of base volumes If er fault or snapshot fault occurred the icon changes to 10400422 002 02 2013 Represents a collection of snapshot volumes If the snapshot is released the icon changes to B Ifa oe or SV prepare fault occurred the icon changes to 2013 Overland Storage Inc 45 8 SnapSAN 3000 S5000 Snapshot User Guide Icon Description Represents a collection of link volumes Represents a collection of pools to which snapshot volumes belong If a threshold excess occurred in pool the icon changes to 5 PL Number of Elements Displays the number of components for each type Figure 5 9 Base Volume List The base volume list displays the information about the items described below Double clicking an item switches the display to the list one level below the currently displayed one Type Disp
318. the Cancel button on the Processing dialog lets you stop deleting snapshots and return to the snapshot management screen However it is impossible to cancel deleting the snapshot once in deleting state Restoring Data from a Snapshot Start the restoration of snapshot data from a snapshot volume to the base volume Display the Snapshot Restoration screen using one of the following procedures e Select a snapshot volume from the information list display area Then from the menu bar of the snapshot management screen select Operation Snapshot Operation Snapshot Restoration e Select a snapshot volume from the information list display area Then right click on the mouse and select Snapshot Restoration Snapshot Restoration Execution Result Unexecutable Information status sv Number sv os Type Active 00Seh WN DBSer003 Active DBSer003_ Active DBSer003_ 2 e Summary C Details Snapshot restoration is started Restore Conditions Derived Generation Keep Delete Choose Keep when re restoration or use via the link volume is assumed Choose Delete when it is ummecessary Choose volume which you want to execute from list then click Execute button It is possible that multiple snapshot volumes set as different base volumes are chosen and executed Q Please check the completion of restoration by snapshot screen Execute Close Help Figure 5 83 Restoration From the list select the s
319. the business volume by using the snapshot created before the fault occurred Physical Fault It indicates a fault that data of the business volume is destroyed due to a hardware fault and becomes unavailable It requires physical restoration such as hardware exchange When a physical fault occurs in the copy source business volume and data is destroyed copy destination snapshot also becomes unavailable Volumes in the disk array are in RAID configuration and data is not destroyed unless multiple faults occur In case of physical fault however you must restore data from other media not from snapshots Operations Backup Operation This section describes an example of backup operation by using the snapshot function Although the text describes the commands in input order the command execution is automated by job scheduling software on the system built actually The snapshot of data in the business volume BV used in operation is created Then it is saved to the tape by using backup software Assume that the backup environment has the configuration shown in Figure 2 1 Also assume that LV used for access from SV the first generation and a backup server has been constructed and operation has started in volumes It is assumed that the following information is given to each volume e BV Logical disk name bv001 drive letter G 10400422 002 02 2013 2013 Overland Storage Inc 44 1 SnapSAN 3000 S5000 Snapshot User Guide Lo
320. the following operations e From backup server restore data on BV that is connected to application server via network e Iftape device is connected to application server restore data from tape to BV directly e Seta link from LV to BV and restore data from tape to BV directly on a backup server e Restore data from SV to BV 10400422 002 02 2013 2013 Overland Storage Inc 4A 5 SnapSAN 3000 S5000 Snapshot User Guide Snapshot and Data Consistency When restoring business volume data with operation i or ii data is restored with the standard function of backup software just as the backup operation without snapshot When you restore business volume data with operation iii before setting a link to BV be sure to discard cache data on the application server Take the step in the following description On application server to discard cache data When you restore business volume data with operation iv before executing the restore operation be sure to discard cache data on the application server Take the step in the following description On application server to discard cache data On Application Server Deletion of partition or discarding of cache data is required on application server To discard cache data flush the BV cache data and unmount the BV using the commands provided by snapshot operation You can use the force option to forcibly unmount the MV even when the file system is being used If the process above i
321. the link is established the name of the destination volume is displayed access_mode2 Access restrictions Execution Conditions To display the link state the following conditions must be satisfied An LV or link permitted volume is specified as the target volume The following notes do not apply to joint operation with iSM e The volume list is not being created or updated e TheiSM only special file is not being created HP UX system and Linux system Displaying Logical Disk Information 10400422 002 02 2013 2013 Overland Storage Inc 46 62 SnapSAN S3000 S5000 Compliance WORM User Guide Logical Disk Information Display Command To perform logical disk information display the iSMrc_ldlist command is used The iSMrc_ldlist command targets disk arrays that are recognized by the system and obtains and displays logical disks and associated information Main Options The iSMrc_ldlist command enables the specification of the following options a option Lists information of the logical disks stored in all disk arrays d option Lists information of disk arrays that are recognized by the system de option Lists information of the logical disks stored in the specified disk array If a specific logical disk name is specified only information of the specified logical disk name is displayed cr option This option can be used only in a joint operation with iSM If this option is specified SnapSAN Manager obtai
322. the status of the snapshot Display Description Active Indicates a snapshot is created Inactive Indicates a snapshot is not created Restoring Indicates the state that data is being restored from snapshot volume to base volume Deleting Indicates the snapshot is being deleted Released Indicates the snapshot is released Creating a snapshot changes the status to active Restore Indicates the state that snapshot restoration was suspended suspended Fault Indicates the snapshot fault state SV preparing Indicates that state in which a snapshot volume is in preparation SV prepare fault Indicates the state in which an error occurred when a snapshot volume was in preparation Restore preparing Indicates the state in which snapshot restore is in preparation Guard Displays the snapshot guard status Link Displays the state of the connection with the link volume Creation Time Displays the creation time of the most recent snapshot Nothing is displayed unless a snapshot has been created Generation Number Displays the generation number of the snapshot This item is shown when the snapshot is active or being restored For the derived generation without any generation number no generation number is displayed is displayed for the generation number at snapshot fault Generation Attribute Displays the generation attribute of the snapshot This item is shown when the snapshot is active or being
323. tion Outputting the message during the waiting can be suppressed by changing the SNAP_WAITMSG setting in the operation option setting file For the operation optim setting file refer to the ControlCommand Command Reference Id nams Logical disk name npe OS Type volume nams Mount point volume name path Drive letter or path name mounted to the folder of the NTFS volume accessed by users gensration SV relative generation number snap_status SV snapshot status YFYYYMMDD hhmm ss Snapshot creation time Waiting is dynamically updated until the completion of the waiting On the Windows system Message during execution Waiting Message on completion iSMsc_wsit Info iSM19050 iSMsc_wsit hasnormslly terminsted BV id_name type Specis iFile specisifile name SV id_name type Generstion generation Status snap_status YY YYIMIWDD hh mm 28 Description Outputting the message during execution can be suppressed by setting environment variable SNAP_WAITMSG For the environment variable refer to the ControlCommand Command Reference ld name Logical disk name type OS Type special file name Special file name generation SV relative generation number snap_status SV snapshot status 10400422 002 02 2013 2013 Overland Storage Inc 46 49 SnapSAN S3000 S5000 Compliance WORM User Guide YYYY MM DD hh mm ss Snapshot creation time Waiting is dynamically updated until the completion of the waiting
324. tion one of the following icons indicating an error appears 10400422 002 02 2013 2013 Overland Storage Inc lt q 6 34 SnapSAN S3000 S5000 Compliance WORM User Guide Icon Explanation and Action Explanation Indicates that logical disks which were defined as control volumes are in an inappropriate state The following is the corresponding operations e Setting the control volume in a pair as an RV e Specifying the control volume as a base volume BV by adding a snapshot generation to it e Making the control volume usable from the server by building a link volume LV with the same logical disk number as for the control volume e Making the control volume unusable from the server by canceling Access Control or unbinding the volume e Making unrecognizable the disk array to which the defined control volume belongs Action ZA Redefine as a control volume a volume that is not used with data replication or snapshot IV Alternatively take any of the following actions depending on the control volume state If the control volume has been set in a pair make it unpaired If a snapshot generation has been added or an LV has been built unbind the snapshot If the control volume has been unrecognizable check the connection state of the control volume and make it recognizable again If the disk array has been unrecognizable check the connection state of the disk array and make it recognizable again If any inco
325. tion to BV is affected by the state of MV BV or RV BV The state of rpl preparing sep preparing and res preparing exists only on the MV side Link Operations BV and Replication States 1 Link Operations to MV BV State MV Operation Replication Separation Restoration rpl exec rpl sep exec separated rst exec res rpl sync preparing rst sync preparing Setting a BV link v v v v Unlinking BV v v v v v Executable Unexecutable Link Operations BV and Replication States 2 Link Operations to RV BV State Operation Setting a BV link RV Replication Separation rpl exec rpl sync sep exec Restoration rst exec rst sync Unlinking BV v Executable e Replication operations and snapshot states Unexecutable 10400422 002 02 2013 Replication operation is affected by the MV BV and RV BV states In addition to execute restoration of the replication operation SV of MV BV needs to be inactive Replication Operations and Snapshot States 1 Replication Operations of MV State MV BV Operation Being restored BV is being SV is being linked linked Replication v v Separation v v Restoration v Executable Unexecutable 2013 Overland Storage Inc lt 3 21 SnapSAN 3000 S5000 Snapshot User Guide Replication Operations and Snapshot States 2 Replication Operations of RV State RV BV Operation Being restored BV is being SV is being linked linked Replication
326. tion_date retention_mods reinitialize state Execution Conditions link unlink Linked Not linked Protection state set to the logical disk by the WORM function If the logical disk is not protected or protection information cannot be obtained a hyphen is displayed RO NA RO expired NA expired Waite protect valid Read write protect valid Write protact expired Read write protect expired Date when WORM fiction starts protecting the logical disk If the logical disk is not protactad or protection information cannot be obtained a hyphen is displayed Date until which the WORM fiction will protect the logical disk If the logical disk is not protected or protection information cannot be obtained a hyphen is displayed permanent The retention date is set as penmanent Mode in which the WORM function protects the logical disk If the logical disk is not protactad or protection information cannot be obtained a hyphen is displayad normal normal mode secure secure mode strict strict mode Logical disk reinitialization state If seinitialization has not been performed a hyphen is displayed formatting y7 Reinitislization in progress value indicating the progress of initialization is displayed in mn format fail Reinitislization failed To display the information about a particular volume the following conditions must be satisfied The following notes do not apply to a joint
327. to obtain multi generation disk backup by transferring data to another disk array using Remote Replication and creating a snapshot from RV It is possible to execute low cost backup by using a storage to which an ATA disk is installed as the data transfer destination Application Server Backup Server Multi generation disk backup Figure 3 19 Multi generation Backup lt Multi generation disk backup gt Transfer data to a remote site using the Overland Remote Replication function Execute separation after transfer completion and create a snapshot from RV Resume data transfer by the Overland Remote Replication function and transfer data to a remote site again Execute separation after transfer completion and create a snapshot using another SV It is possible to keep disk backup for up to 16 generations per RV by repeating this operation Notes on Mixed Operation of Replication and Snapshot This section describes execution conditions of each operation when the snapshot function and replication function are used together and share MV and BV or RV and BV In this section the configuration shown in Figure 2 20 is assumed and operations and states are listed with a matrix 10400422 002 02 2013 2013 Overland Storage Inc 43 19 SnapSAN 3000 S5000 Snapshot User Guide Figure 3 20 Replication and Snapshot e Snapshot operation SV and replication states Snapshot operation and link operation to SV are affected by the st
328. ton Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends Confirmation Gy Ceneration Deletion Generation Deletion gt Confirmation gt Completion Ceneration information Mumber of generations to delete 1 The following snapshot data volume is deleted Tegical disk nass 0003h 2000000991010010_SV0003 10 0 Snapshot 0000h 200000 When the settings are OK click Set to start deleting the snapshot generations If you want to modify any settings click Back ae LE ee ee Figure 5 54 Confirmation Generation Unbinding Settings This screen is to confirm the settings about generation unbinding Check whether the displayed settings about the snapshot volumes to be unbound are correct Set button Displays the following confirmation dialog box v Is it OK to suspend monitoring of the disk array to start Snapshot generations deletion oe Figure 5 55 Confirmation Dialog Box Clicking Yes starts unbinding snapshot volumes The Completion screen is displayed when the processing completes Back button Returns to the Generation Deletion screen Cancel button Displays a dialog box confirming your intention to quit the wizard When clicking the OK button on the dialog box the wizard ends 10400422 002 02 2013 2013 Overland Storage Inc 45 63 SnapSAN 3000 S5000 Snapshot User Guide Completion dy Stat
329. trol command etc it may display Unpaired like the above Unpaired Case of the 2nd layer or more layer pair composition when Forced Unpair is performed to the volume of the 1st layer or the 2nd layer the volume of upper or lower layers may not be displayed In the case of a partition user if the authority is not given for the connected pair it may display No Authority like the above Volume Color Volumes are classified in colors layer colors by alignment of the connection state or types of the displayed volumes Snapshot related volumes 1 BV Navy blue 2 SV Light purple 3 LV White 10400422 002 02 2013 2013 Overland Storage Inc lt 4 5 101 SnapSAN 3000 S5000 Snapshot User Guide Display Example StorageS2800 1 StorageS2800 1 StorageS2800 1 02d5h LX LDB_28_1_3 0095h LX LDS_28_1_4 0204h LX LDL_28_1_9 Navy blue Light purple Figure 5 103 Volume Colors The color of MV BV RV BV and RV MV BV follows the color of replication related volumes Replication Related Volumes Immediately after pair setting and at completion of Separate volumes are displayed in layer colors Agreement of a volume color of a pair indicates that the pair is synchronous 1 PV Green 2 1st layer Light blue 8 2nd layer Blue 4 3rd layer Yellow Display Example StoraceS2300 1 StoregeS2900 1 StorageS2900 2 StorageS7900 2 0012h LX 1_0012 000ah LX 1_000a 0003h LX 1_0003 0007h LX 1_0007
330. trol has been installed Program Files Overland Storage iSMrpl etc by default as a text file beginning with iSM_Log Check the contents using a text editor The internal information necessary for analyzing faults is recorded in operation trace Abnormal End of iSMrc_umount Command If a program running on server is referring to a volume the command outputs the following message and terminates abnormally iSM13609 Access of specified disk was refused For obtaining a static point in file system the program in question must be researched and halt of the program must be specified in operation procedures If iSMrc_umount still terminates abnormally after halting all applications and services accessing to a disk in question take the following actions 10400422 002 02 2013 2013 Overland Storage Inc 44 17 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault 1 Terminate Application Halt the applications and services that are referring to a volume concerned with the programs running on a server After verifying halt of applications and services execute iSMrc_umount again If unmounting to keep a static point at snapshot creation results in abnormal termination even after this step proceed to the next step 2 60 second waiting If BV unmounting failed wait for 60 seconds and then create snapshot However if snapshot is created in the 60 second wait time files less than 600 byte and files being upd
331. tter is specified for a volume consisting of multiple partitions all partitions in the volume become operation targets therefore the default setting does not allow the multiple partitions to be operated Operations can be performed for a volume consisting of multiple partitions by changing the settings in the operation option setting file When snapshots have been created in all the SVs and the oldest SV has been linked with a LV a snapshot creation by cyclic creation of the snapshot creation command fails When SnapControl is operated in cooperation with SnapSAN Manager a snapshot is created for the next oldest generation except for the linked SVs 10400422 002 02 2013 2013 Overland Storage Inc 46 39 SnapSAN S3000 S5000 Compliance WORM User Guide Displayed Information The iSMsc_craate command displays the following messages after snapshot creation On the Windows system iSMsc_create Info iSM19010 iSMsc_create has normally terminated BV id_name type Volume Name volume name Path path SV id_name type Generation generation Status Snap_status YYYY MM DD hh mm ss Description ld nams Logical disk name ppe OS Type volume name Mount pointvolumename path Drive letter or path name mounted to the folder ofthe NTFS volume accessed by users generation SV relative generation number 1 is displayed immediately after snapshot creation Snap _status SV snapshot status YYYYAMLDD hh mm ss Snapshot creation t
332. type ldn Logical disk number ld_name Logical disk name attribute Logical disk attribute capacity Logical disk capacity pd_type PD Type attribute of the physical disk configuring the logical disk e FC Logical disk configured of physical disks with the FC attribute e ATA Logical disk configured of physical disks with the ATA attribute e SAS Logical disk configured of physical disks with the SAS attribute e SSD Logical disk configured of physical disks with the SSD attribute 10400422 002 02 2013 2013 Overland Storage Inc 46 64 SnapSAN S3000 S5000 Compliance WORM User Guide 10400422 002 02 2013 2 G LS When the d option is specified Logical disk information as shown below is listad Receiving Disk Array Name Msnsgement disk_srmsy_nsme management Description During ajoint operation with iSM this message remains until data reception is completed The number of dots increases as data reception progresses disk_amsy_neme Disk amay name management Identifies whether the system recognizes the disk amay direct Disk amay directly recognized by the system indirect Disk amay which is not recognized by the system When the protect only option or the protect all option is spacified Logical disk information as shown below is displayed Receiving Disk Arasy Nsme Msnsgement LDN OS Type LD Name Attribute Capacity PD Type Datas Protection disk_srsy_nsame imansgement kin type Kd
333. uarding a Snapshot To guard a snapshot the following conditions need to be satisfied e The relationship between the BV and SV to be operated is established e The activity state of the BV and SV to be operated is snapshot active or restoring e The disk array is not in the freeze state Operating a Link Volume This section describes operation of a link volume Binding a Link Volume Binding a link volume is to create LV that a server recognizes and define a list of volumes link permit volume that access is permitted via the LV The created volume list is referred to as a link control list LCL LV is bound by the SnapSAN Manager configuration setting function 10400422 002 02 2013 2013 Overland Storage Inc 43 14 SnapSAN 3000 S5000 Snapshot User Guide Create LV with specifying BV for which a snapshot is created This enables you to create a link control list for LV the specified BV and its SV Figure 3 14 Binding a Link Volume Setting a Link This function connects LV with an appropriate volume out of the link control list defined in LV Setting a link between LV and a connection volume enables you to access BV or SV via LV A link can be set by command operation from a server on which SnapControl is installed or by GUI operation with iSM A link can be set only for the volumes BV or SV registered in the link control list If a link is set the destination volume is put in the Not Ready state and cannot be access
334. uir Aa 4 Restoring Business VOlUMe Daid ssisscices castateseecavaaracids Baas AA 4 6 illegal Fie System orn SY LV sicscccsscaiestessecstsiesdviasectssasissccaoscsiesiseeetvieadvivacstvecstvecstestavicateloavi TE 4 19 Collecting Information of Error Of UNKNOWN COUSE sneesemicssiraininir ttir n a 4 22 Operations when the Configuration is Changed s essessssesesesesesrssesesesessssesenesesssesesesessessvesesesesssesese 4 23 WUSdating volume Oi sis taskateectehie Midis in aaesnth Malate dine AN EN 4 23 Chapter 5 SnapSAN Manager SNAPSAN Monager MAIN WINCOW s cescesescssescsssscssesesesseseseeseceeseseeseseuscssuscsaescsasacsesassesesseseesesessesaeaeseesesasaeees 5 2 10400422 002 02 2013 2013 Overland Storage Inc lt 41 SnapSAN Snapshot 3000 S5000 User Guide POOLING ING iiaiai anaa R ar EE A ih Raahied 5 12 Configuration Display Command ISMview eesceseesseeeescsesescteeseceseseneecsesescaeseseeeeseseseseseeatecseaeeeeeees 5 33 BINAN A V OIUIMG 24 2s secteovessstadasecassessesicautavedonesvadanseusssiatdvatastiawevest ETEA EA ESN A 5 33 Binding thie Snapshot RESEIVE ATCO a i e0sceis scevstesscecevsecanzecbevtcaces E N ER E ORR neen tes 5 35 Binding a Link V OlWIMGE en E NN NANNA 5 53 Unbinding Snapshot Related VOIUMES pesreore neate are E E E 5 64 SNOPSNONOPErAHON sirist iesire ne a EA T ise weeds AT Meds Neh ali Bote disease elitaseuen civhed 5 70 ceoing a Snapo craiceann a O A 5 70 WANKING oraraa ana a A N 5 93 Changing AC
335. ully 10400422 002 02 2013 2013 Overland Storage Inc lt 4 6 29 SnapSAN S3000 S5000 Compliance WORM User Guide Create Update olume List j 00006 Execution of the Create Update Yolume List was successful Figure 6 10 Execution Successful Clicking the OK button returns to the Volume List Display screen The Volume List Display screen is automatically updated after the volume list file has been created updated CSV Output of Information List The information displayed on the Volume List Display screen is output as a CSV file and then saved Select File and then select CSV Output of Information List on the Volume List Display screen The CSV Output of Information List screen appears cs Output of Information List 2 xi Save in etc x ef Eee trace Fiename fvolst Save as type csv csv z Cancel ZA Figure 6 11 CSV Output Information Specify the save destination The default save destination is the etc folder in the installation directory Specify the file name The default file name is vollist csv Click the Save button to save the input information When the Cancel button is clicked the screen is returned to the Volume List Display screen without saving the file When the file has been saved successfully the following message appears oa j 00009 Data was saved as a CSV file Figure 6 12 CSV Output Information List 10400422 002 02 2013 2013 Ov
336. umber of the snapshot This item is shown when the snapshot is active or being restored For the derived generation without any generation number no generation number is displayed is displayed for the generation number at snapshot fault Generation Attribute Displays the generation attribute of the snapshot This item is shown when the snapshot is active or being restored Display Description Normal Indicates a normal generation Derived Indicates the generation that became Derived by restoration Used Capacity GB Displays the used snapshot capacity This item is shown when the snapshot is active or being restored Capacity GB Displays the virtual capacity of the snapshot volume The displayed value is equal to the capacity of the corresponding base volume 10400422 002 02 2013 2013 Overland Storage Inc 45 13 SnapSAN 3000 S5000 Snapshot User Guide Link Volume list Type _ LV Number LV OS Type LV Logical Disk Name Parton Name Ov Number OV OS Type Ov Logical Disk Name LV Mose Re 0 YN O89001 0041 03 n ve O00 0030 0030 Figure 5 11 Link Volume List The link volume list displays the information about the items described below Double clicking an item switches the display to the base volume unit list corresponding to the selected item Type Displays the volume type Icon Description LW j S Represents a link volume LV LV Number Displays the logical disk
337. unting LV test server Unmount LV SV to release a link between the volume and the file system Unmounting LV SV deletes the drive letter or the NTFS folder name set to the volume automatically iSMrc_umount drv H Releasing a link between LV and SV test server After unmounting release a link between LV and SV iSMsc_unlink lv 1v001 lvflg ld 2013 Overland Storage Inc 44 15 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault Measures for Errors This section describes how to take measures against faults that occur during snapshot operation The following faults are described in this section e Snapshot fault e SnapSAN Manager Server or client fault e SnapControl abnormal end e Down of server machine connected to SV LV Invalid product How to collect information necessary to analyze unidentified faults is also described Snapshot Fault This section describes the causes of inability to access a snapshot and the measures Insufficient Snapshot Reserve Area SRA Effect when insufficient SRA capacity occurs If data is written to a business volume BV where a snapshot is created with insufficient SRA area the created snapshot is deleted automatically as extended operation of write When a backup server accesses a snapshot the link set between LV and SV is released and the snapshot is deleted Therefore I O is terminated abnormally because the server operates in the same way as
338. uppressing I O to the logical volume to keep data consistency of BV and SV To keep data consistency of BV and SV unmount BV after terminating operation and release the link between the volume and file system Before unmounting you need to terminate all applications that may access the drive If unmounting BV fails and there is no means to avoid the failure wait for 60 seconds in that state and proceed to Step 1 4 It is possible to create a snapshot without unmounting in this step It is necessary however to pay full attention to data consistency iSMrc_umount drv G 4 Creating a snapshot application server Create a snapshot on SV and enable operations to be restarted When you create a snapshot check whether the snapshot of the oldest generation is not used from a test operation iSMsc_create bv bv001 bvflg ld cyclic 5 Mounting BV application server Mount BV to use as a business volume again iSMrc_mount drv G 10400422 002 02 2013 2013 Overland Storage Inc 44 14 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault 6 Restarting applications application server Restart the applications and services that have been terminated in Step 1 1 If services were halted in Step 1 1 restart the services by the following procedures If services were not halted in Step 1 1 it is not necessary to execute the following Example Starting service NET START service name To start the se
339. us 18M Server Generation Deletion gt Confirmation gt Completion fi Snapshot generation deletion succeeded Click a following link if necessary Delete another generations Click Finish to exit Monitoring of the disk array resumes Finish Help Figure 5 56 Deletion Succeeded The snapshot generation unbinding result is displayed When the processing succeeded the following link is displayed e Delete another generations Opens the Generation Deletion screen to unbind other snapshot generations Finish button Returns to the monitoring screen e A snapshot generation for which a snapshot has been created cannot be unbound To unbind such a generation first delete the snapshot using the snapshot management screen and then unbind the generation e Ifthe configuration change of the base volume is locked the snapshot generation cannot be unbound e Ifthe configuration change of the snapshot volume is locked the snapshot generation cannot be unbound e Ifa volume is snapshot fault state the snapshot generation cannot be unbound Unbinding Snapshot Related Volumes The types of snapshot related volumes that can unbound are as lt Types of snapshot volumes that can be unbound gt LV Link volume Link volume can be unbound using the Link volume Unbind screen described in this section SV Snapshot volume that failed to be bound These volumes can be unbound using the LD Unbind screen 104004
340. us Hohe seins as dies ewes ada dees eed oe 1 5 SOMWGKE COMMQUIQNOMN aeo oan n aie ieebecita dees adsense aera Mendota 1 6 Chapter 2 Installation SYSTEM COMMQUICTION sssaaa aa aA AAR Aa DEER a AEA AAR RAT aaia 2 2 Hardware Coniguroli n cevesvceseesscteesescacasantuveseuscicadadeiesUetaudaicbaatacdelassuxasalveivescdced AN aE Aa aA Aa AAR 2 2 SOMWORE COMMQUICTION scsssetscsicscyeassxectepessesesscacstcs antes iae Naaa AA A iN AAR 2 2 Sotware INSTAMATOM siseste n EERE AR OESE NAN R 2 3 SnapSAN Manager Snapshot Management u ceccesccsscssesesssscssescsssecsesesseecsecessesessesesseseeecseescsseecsesesees 2 3 ATO EEA K EAEE E AE EA E E E E A A AE 2 4 Disk Aray COMMQUICHON sarriena iiaa AE AAA A A 2 5 Product License UNnIOCKING oirin A NN 2 5 Settings of Disk Array Name Logical Disk Name and Port NAME sssssssssssssssssssessssessssessssessessssessssessssessese 2 6 Disk Arrays Identifying the Control Volume Attribute sesesesesessssssesesesessssesesesessssssesesenessssesesenesessesesesesss 2 9 MC ONNO ANO sere rn a T cecal aa ircassteacrisecsVor canatcaeetae esis 2 11 Chapter 3 Function Large Capacity VOUE siressa aean iania iaa E arsa aari iai 3 22 Chapter 4 Operation and Maintenance Logical Faull GMG PAYSICGl POU se esec bss eeeltes sacs hike deed ens vbeatddeden a det clon aaa aiaa a 4 PHYSIGGIIE GUID isora ame tie eas ate Risa ants 4 1 OPERONONS psonn acas Pel aa eh eet enero Ea Naa NNS INEEN ACAS 4 1 BACKUP Operaio sezir A E i c
341. ust have at least about 4 MB of unused space The total size of fault information files differs depending on the system status and it may exceed 4 MB It is advisable to allocate an unused space of enough size 1 Log on as a member in the Administrator group 2 Click the Windows Start button and select ControlCommand Storage Manager Volume List and Difficulty Information Gather from Programs All Programs for Windows Server 2003 10400422 002 02 2013 2013 Overland Storage Inc 44 24 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault 3 Confirm that the iSMvolgather directory is created under the installation directory when the storage destination directory is not changed or under the specified directory when it is changed and obtain the files under that directory Operations when the Configuration is Changed It is necessary to recreate the volume list to reflect the new configuration information to the volume list when you change the disk array or server OS configuration Conditions Requiring Volume List Update Be sure to recreate the volume list after changing the following configurations e Change of disk array configuration e Change of disk array name e Change of logical disk name e Change of logical disk OS type e Adding of logical disk and change and deleting of configuration e Adding and deleting of snapshot generation and link volume e Change of Access Control setting e Ad
342. uthority authority User 2 With Without P P z authority authority User 3 Without With authority authority v g User 4 Without Without authority authority 7 7 7 7 Use of iSCSI 10400422 002 02 201 There is no difference between the snapshot function used when the connection protocol between the server and disk array is FC and that used when it is iSCSI Restrictions by the Thin Provisioning Function The thin provisioning function allocates a capacity of a disk array to a volume according to the amount of data written into the volume 3 2013 Overland Storage Inc 43 24 SnapSAN 3000 S5000 Snapshot User Guide For a disk array for which the thin provisioning function is available any of the following combinations of BV and SRA SDV can be set virtual capacity logical disks and normal logical disks For the snapshot operation of which SRA SDV is a virtual capacity logical disk the difference control is performed for the actual used capacity To avoid the actual used capacity incorrectly being allocated to BV a quota can be specified to the BV to prohibit data over the specified quota from being written For SRA SDV since the usage is managed by Snapshot Threshold no quota can be set The actual used capacity increases as data is physically written in the disk For this reason the actual used capacity may be large for a volume in which the amount of data is apparently small or a volume from which data is deleted
343. uto delete mode there is not SV to which guard is set in the later generations than the generation of the SV to be operated e The BV to be operated is unlinked e A link is not set between the SV to be operated and LV e BV is unmounted from a host e No link is set to other SVs which are set to the BV to be operated with any LV e Ifpair setting is made to the BV to be operated as replication MV the replication state is not being restored or replicated e If pair setting is made to the BV to be operated as replication RV the replication state is in the Separate state e BV to be operated is not in the update prevention state e The disk array is not in the freeze state Deleting a Snapshot This function deletes a snapshot image created in SV Deleting unwanted snapshots enables you to use storage capacity effectively If BV retains multiple generations you can delete any generation However note that free space may not be increased if you delete a middle generation The area is not released if the snapshot data needs to be retained as the differential information of the older snapshot than the deleted generation It may take some time to delete a snapshot depending on the amount of differentials If you suspend operation to delete a snapshot pay attention to that A snapshot can be deleted by command operation from a server on which SnapControl is installed or by GUI operation with iSM Figure 3 12 Deleting a Sna
344. ver Daily backup DDR N Create a snapshot Backup every hour Figure 3 17 Combine Remote Replication Link Operation An operation example where the snapshot function and Remote Replication are used together is shown below Backing up data transferred by Remote Replication to another medium To secure data against a failure during data transfer by Remote Replication data needs to be backed up also at the transfer destination when data is transferred to a remote site It is possible to reduce cost by using the snapshot function for backup at data transfer destination Local Site Remate Site Application Server Application Server 1 Remote Site li Backup Server Backup Server Local Site Figure 3 18 Operating Backup with Remote Replication lt Data transfer to a remote site gt 10400422 002 02 2013 2013 Overland Storage Inc 43 18 SnapSAN 3000 S5000 Snapshot User Guide Transfer data to a remote site using the Overland Remote Replication function Execute separation after transfer completion create a snapshot from RV and execute backup at the remote site After start of backup at a remote site resume data transfer by the Overland Remote Replication function During data transfer data of the remote site RV is not secured It is possible however to keep data at the completion of previous transfer by creating a snapshot Obtaining Multi generation Disk Backup It is possible
345. ver restarts while the LV is in the Not Ready unavailable for read or write state In such a case it is required to have the OS recognize the LV again 10400422 002 02 2013 2013 Overland Storage Inc 44 25 SnapSAN 3000 S5000 Snapshot User Guide Logical Fault and Physical Fault When you add delete or change the control volume definition in the disk array in which the control volume attribute cannot be identified execute the following operation before updating a volume list Register the logical disk to be used as a control volume in advance by executing the Define Control Volume operation in the Volume List Display screen To successfully register volume information in the volume list update a volume list in the following states Pairs are separated when the RV is connected to the server The link volume LV and snapshot volume SV are linked when the LV in the snapshot function is connected to the server The base volume BV and LV are not linked when the BV is connected to the server Protected data is readable when the logical disk for which the data retention function is applied is connected to the server The volume is in the In use state and accessible when the logical disk for which the power saving function is applied is connected to the server All the volumes are mounted and every mount point to be used drive letter or NTFS folder name is set correctly The link path between disk arrays is normal when the
346. verland Storage Inc lt 4 5 32 SnapSAN 3000 S5000 Snapshot User Guide LV Mode Displays the access restriction of the link volume Configuration Display Command iSMview The configuration display command displays the disk array settings resource status and LD configuration and status This command can be executed from a server machine on which the SnapSAN Manager server is running The configuration display command displays the following snapshot related information e Snapshot configuration information e Volume link configuration information e SRA configuration information Binding a Volume When installing snapshot When installing snapshot perform the configuration setting in accordance with the following procedure Start Configuration Setting Bind a pool fiom a physical disk mounted in the disk aray Bind a logical disk and if necessary a control volume Bird Control Volume and Logical Disk Bind the snapshot reserve areain the pool Bind Snapshot Reserve Area Bind asnapshot volume and add a srapshot generation to the ead andaian gical disk b be used as the base velume ind Link If necessary bind avolume to be linked to the logical disk to Bae Link clone be used as the base volure and snapshot generation atthe time ofbackup If necessary set access management for the bourd Set Access Management re End Configuration Setting Figure 5 20 Binding a Volume Flow
347. volume to the volume list for registration 10400422 002 02 2013 2013 Overland Storage Inc lt 4 6 38 SnapSAN S3000 S5000 Compliance WORM User Guide When the volume list is created or updated the display of the Volume List Display screen is updated automatically Confirm that the definition information is updated correctly by checking the displayed information of Volume Definition Operation on Snapshot The SnapControl command provides the functions to operate volumes by using the disk array s snapshot functions as well as those to obtain and display a variety of information Snapshot Creation Command The iSMsc_create command is used for snapshot creation The iSMsc_create command creates a snapshot of the BV as it is at the time of command execution in an SV If the file of the specified target generation contains any valid data the command first deletes the data and then creates a snapshot Main Options For the iSMsc_create command you can specify the following options Specification of the target SV Specify the volumes of the BV and SV e Specification of the BV bv volume bvflg bv_flg Specify the volume and volume type of the BV e Specification of the SV sv volume svflg sv_flg Specify the volume and volume type of the SV e Specification of the cyclic SV use cyclic Use this option to create a snapshot in the SV of the oldest generation On the Windows system when a specific partition drive le

SnapSAN S3000/S5000 Snapshot User Guide

Contents

Download Pdf Manuals

Related Search

Related Contents