LUNWorks Read Me First
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1. To assign more than 64 devices at a time select all of the individual devices and drag them to the target node If the nodes pane view menu is set to w o storage and you assign storage to a node the application may quit unexpectedly EC 123138 313410603 LUNWorks Read Me First In rare cases assigning devices from one node to another may cause previous device assignments to the second node to be lost when that node is rebooted To resolve this first try scanning for nodes If this does not work unassign the devices then reassign them to the second node Lost delayed write errors could indicate a high error rate on the network hardware If lost delayed write errors occur run hardware software diagnostics on the network hardware Do not assign storage to a Windows NT node while it has one or more busy CPUs or is performing heavy I O because the processes using the CPUs or performing the I O may lock up During heavy I O LUN Works drivers map large amounts of physical memory into the system s virtual address space Each physical page of memory mapped consumes an entry in the system page table The system pre allocates a fixed number of page table entries but LUN Works may require more The result can be a blue screen crash with the message NO_MORE_SYSTEM_PTES To avoid this crash configure the system to allocate enough page table entries to map ALL of the physical memory in the system To do t2. StorageTek s Customer Support website and follow the contact links http www stortek com StorageTek css If you would like to send feedback about the documentation fill out a Reader s Comment Form and or send your comments to Information Development Storage Technology Corporation One StorageTek Drive Louisville CO 80028 2201 We encourage and appreciate your feedback EH Contents 313410603 e System Requirements e Windows NT Domain Issues e Host Bus Adapters e Known Issues e Application Transparent Failover ATF e SCSI Filter Drivers e Microsoft Cluster Server EC 123138 1 LUNWorks Read Me First E System Requirements All LUN Works nodes must meet the following minimum system requirements Windows NT Version 4 0 with Service Pack 4 or higher PCI bus equipped computer with one free bus mastering slot 200 MHz Pentium or faster 64 MB of RAM Available disk space 4 MB Network interface card NIC Network protocol stacks NetBIOS and TCP IP Solaris 2 6 and 7 Solaris 7 works in 32 bit mode only PCI bus equipped computer with one free bus mastering slot Any UltraSPARC workstation or server 64 MB of RAM Available disk space per file system root 500k and opt 500k Network adapter Network protocol TCP IP Note A Windows NT 4 0 computer is required with LUN Works installed and configured on the same network as the Solaris node The Windows NT system controls the
3. quick identification you can rename the devices that contain database partitions e There is a limit of 255 characters on Domain Name System DNS names of nodes in the LUN Works database e LUNWorks Identify Device feature may not be able to blink the lights on RAID disks because the RAID controllers may satisfy I O from cache E Application Transparent Failover 313410603 CLARiiON s Application Transparent Failover ATF Version 1 1 1 is a software product that works with StorageTek s 914x and 916x disk array storage subsystems This software product allows applications to continue running after a failure of a storage processor SP host bus adapter HBA or subsystem cable without human intervention At the detection of a failure ATF routes the I O of an application through a secondary path to the disk arrays To set up CLARiiON s ATF 1 Install LUNWorks on all of the nodes requiring this application 2 Set up the LUNWorks database 3 Save the database to a file for backup purposes 4 Enter the registry settings from the registry table for each node that accesses the disk subsystem Refer to the ATF Technical Tip or Installation and User s Manual for the specific registry values 5 Restart the node to activate the registry changes 6 Scan for devices the discover the LUNs on the array s storage processors 7 Assign failover pairs EC 123138 7 LUNWorks Read Me First MW SCSI Filter Drivers LUN Wo
4. BA driver for use with qualified QLogic HBAs and filter driver which allows you to use other vendors qualified HBAs If you are using a LUN Works ready HBA do not install the driver until after LUN Works is installed Will you be installing any LUNWorks Ready HBA drivers Will you be installing any LUN Works Ready HBA drivers If you plan on installing any LUNW orks Ready HBA drivers we will not start the LUN works drivers at this time After completing this installation routine install all LUNWorks Ready HBA drivers then restart the system mE QLogic HBA Notes e The BIOS must be disabled on the HBA Failure to disable the BIOS can result in unstable operation and compromised storage e The QLogic HBA driver does not support hot plugging You cannot insert an HBA card into a computer that is powered on 313410603 EC 123138 LUNWorks Read Me First EH Known Issues The following are known issues LUN Works Identify Device feature may not be able to blink the lights on the disks because the controllers may satisfy the I O from cache Some documentation incorrectly states that LUN Works supports 200 nodes and 16 000 LUNs LUN Works supports up to hundreds of LUNs and hosts on a single SAN Only use host bus adapters HBAs and drivers that have been certified for this version of LUN Works A Fibre Channel disk cannot be used as a boot disk with LUN Works Make sure only one instance of the LUN Work
5. LUN Works application EH Windows NT Domain Issues The intent of LUN Works is that the SAN should parallel the Windows NT domain and the design reflects this in the following ways Administration groups are selected from domain groups Node names are discovered by enumerating machines in the domain Configuring a SAN that has no domain or spans or crosses domains may cause the following administration difficulties LUN Works cannot automatically discover nodes in domains other than that of the node running the application See the Installation and User s Manual for more information about node discovery and adding nodes to the SAN database Administration groups can only be chosen from the domain of the node that sets up the database Because of this limitation the application typically cannot run on nodes from other domains Depending on the types of name resolution used on the Microsoft network and on the TCP IP configuration LUN Works may not be able to reliably communicate with nodes on other domains EC 123138 313410603 LUNWorks Read Me First E Host Bus Adapters LUN Works supports two types of host bus adapter HBAs e The JNI HBA and driver has its own unique installation instructions JNI FCE3210N JNI FCE6410N e The QLogic HBA driver is integrated into the LUN Works component installation dialog box QLogic QLA2100 series QLogic QLA2200 series JNI HBA Notes LUN Works ships with the QLogic H
6. LUNWorks Read Me First STORAGETEK Information in this file is subject to change In the event of changes the information will be revised Comments concerning its contents should be directed to Information Development Storage Technology Corporation One StorageTek Drive Louisville CO 80028 2201 Or submit an online Comment Form at http sts stortek com sts nid nidrcf htm StorageTek the signature Information Made Powerful and LUN Works are trademarks of Storage Technology Corporation Other product names features and terms used in this publication are for informational purposes only and might be trademarks of Storage Technology Corporation or of other companies 2000 Storage Technology Corporation Louisville CO USA All rights reserved Printed in USA LUN Works Read Me First Welcome to LUN Works LUN Works is a software product that allows you to manage Fibre Channel storage in a highly efficient manner as an administrative cluster All information in this file is applicable to the installation and configuration of LUN Works Note Refer to the LUN Works Installation and User s Manual and Disk on Demand Certified Components file for more information Refer to the LUN Works for Solaris Installation Manual and Read Me First file for more information about LUN Works on Solaris E Contacting Us We welcome input from our customers If you have any comments or suggestions for improving our products go to
7. Server node is reserving a storage device the LUN Works application may not display the partitioned device icon badge because the reservation of the device prevents LUN Works from reading the device 8 EC 123138 313410603 STORAGETEK INFORMATION made POWERFUL World Headquarters Storage Technology Corporation One StorageTek Drive Louisville Colorado 80028 USA Phone 1 800 786 7835 Fax 719 536 4053
8. added functionality does not operate properly in certain environments If you experience problems when using LUNs greater than 7 try to reorder the hardware in your SAN by swapping port connections between devices e When running LUN Works on a SAN that does not yet have a database and you have a RAID with no LUNs as your only storage or a RAID with no LUNs that you want to use for database storage you must configure the RAID on a machine that does not have LUN Works installed This step is required because you cannot create a database on RAID storage device until after the RAID is configured but a RAID array cannot be discovered and assigned to a LUNWorks node until a database has been created e For any non disk device that is assigned to a Windows NT node ensure that software on the Windows NT node is not using the device before attempting to unassign the device For all non disk devices LUN Works will not prevent you from unassigning the device even if it is in use If a device that is in use is unassigned I O to the device will fail e If you lose your connection to the database when the LUN Works administration application is running your storage devices will be listed as missing devices when you scan for devices If you scan for devices again all storage devices will be displayed as unlicensed devices To solve this problem check your Fibre Channel connections and scan for devices until your licensed devices are restored or resta
9. his change the SystemPages value in the registry and reboot Tip Windows NT supports up to 50 000 page table entries Setting the registry entry to a higher value will have no effect Unfortunately this number of PTEs can only map 195 megabytes of physical memory Windows NT consumes some of this memory for other purposes so performing simultaneous cumulative I O operations that total more than approximately 175 megabytes from a single node may crash the node Path Value Name Value Type Implicit Default Purpose HKLM SYSTEM CurrentControlSet Control Session Manager Memory Management SystemPages REG_DWORD O indicates 10000 pages or 40 MB Determines the number of pages of physical memory that can be mapped into system virtual memory Use the following formula to determine how many pages are required to map all of the physical memory SystemPages Main Memory Size in Megabytes 256 For example with 64 MB of main memory SystemPages 64 256 16384 Note Enter the result as a decimal number 313410603 EC 123138 5 LUNWorks Read Me First e The Windows NT SCSIPORT driver does not reliably discover logical units with LUNs greater than seven 7 Normally SCSIPORT only supports logical units with LUN numbers from 0 to 7 The ability to access LUNs greater than 7 by setting the LargeLuns registry key was added to SCSIPORT in Service Pack 4 The scanning logic for this
10. rks is not compatible with a class of drivers called SCSI filters unless SCSI filter compatibility mode is enabled e Windows NT nodes operating in SCSI filter compatibility mode are subject to the following target and LUN limitations of the system SCSIPORT driver 32 targets 0 31 per bus 8 LUNs 0 7 per target e This mode may cause more scanning of storage SCSIPORT scans as well as LUN Works Set the following registry value to enable SCSI filter compatibility mode HKEY LOCAL MACHINE SYSTEM CurrentControlSet Services trils ScsiFilterCompatibility 1 DWORD value To optimize the interaction of LUNWorks and SCSIPORT use the following settings HKEY_LOCAL_MACHINE SYSTEM DISK LunRescan String value ScanDisconnectedDevices 1 DWORD value EH Microsoft Cluster Server Review the following notes for information about Microsoft Cluster Servers e Use only Windows NT partitioned not UPM storage as the quorum disk e Use of a UPM logical device as the quorum disk is untested The logical device system encounters problems discovering logical devices if the physical devices are reserved by another node in the cluster e When repartitioning a device that is on the same bus as the quorum disk all partitions on the disk may become inaccessible when you commit the changes in Disk Administrator To access the device reboot the node that did the repartitioning When a Microsoft Cluster
11. rt the administration application e The SCSI Adapters control panel can only list 32 devices per adapter If an adapter has more attached devices than the control panel can list the adapter will disappear from the adapters list in the control panel This does not prevent you from using assigned storage e If the 32 device per adapter limit in the SCSI Adapters control panel is reached none of the attached tape devices will be listed in the Tape Devices control panel This limitation may prevent you from configuring tape device drivers e Ifa device has been removed turned off or unplugged and shortly afterwards you use LUN Works Scan for Devices command the device scan may take a few minutes to finish During this time LUN Works is waiting for the newly missing device to come back online e When using LUN Works in a workgroup environment the LUN Works application can only be run from the node that set up the database because only groups local to that machine can be selected as administration groups EC 123138 313410603 LUNWorks Read Me First e The Company Organization name displayed in the splash screen and in the About LUN Works dialog box is truncated to 30 characters Longer names will display correctly in the LUN Works Registration dialog box e Devices containing database partitions do not have a special icon in the storage pane Use LUN Works Device Information dialog box to locate database mirror set partitions To allow
12. s application is running before and during the database creation procedure The database once created contains a lock that prevents multiple instances of the application from running simultaneously Before creation of the database this safeguard does not work Problems such as data loss and data corruption have been observed when hot swapping Fibre Channel JBOD Gust a bunch of disk drives attached to a Fibre Channel switch To avoid these potential problems avoid this situation If the database is created on storage that supports a failover application such as ATF the administrator must use failover software on all nodes particularly the administration nodes If an administration node does not have failover software database I O will start to fail after LUNs are switched to an alternate controller during a failover procedure If you use CLARiiON s Navisphere with LUN Works you must enter the registry settings from the Installation and User s Manual Chapter 6 or the ATF Technical Update Users of multi processor systems that have only a single processor installed but are running the multi processor Windows NT kernel may experience a system freeze during the LUNWorks installation or at Windows NT startup When assigning devices by dragging a selected device group LUN Works can only assign up to 64 devices at a time If you try to assign a device group with more than 64 devices LUNWorks will report an error number 21001009
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