Dell PowerVault TL2000 Support Manual
Contents
1. Dell PowerVault TL4000 TL2000 Failover Guide Dell PowerVault TL4000 TL2000 Failover Configuration Guide This document describes the failover feature outlines the supported failover configurations for the Dell PowerVault TL4000 and TL2000 products and provides instructions for configuring the library drives and host server for failover Please note the supported configurations are closely related to the LTO drive generation and form factor installed in the tape library Please refer Dell PowerVault supported Failover configuration matrix table 1 and 2 Contents MATURE Bes UMN acannon ain EAEE ES cemented evdaauenaundsiceciaanbghwisadsas inthasenlaniisavasianeuanakatabadienndincsiins 2 Dell PowerVault TL2000 TL4000 Configuration Support matrix cccceeeesseseeeeeeeeceeseeeeeeeeeeeeeceeeeeeeees 2 Basic Environment Configuration REQuireMent scccccssseeecccesseecccceeeeceeceecececeeescceeseceeeceeeeeeeseeaeeeeeees 3 Failover Support Cone ura BING aiiis raaa Aa 4 Connon OS ar T EEEE EAEN 4 LTO5 Specific Requirements For Failover Support ccccccesseeccccseececceeececceeesececceeeeeeseeeeeececeeeeeeeeeeeeeees 11 Heterogeneous validated configurations ccccesseecccceseeececeeecccceeeccecceuseececeeececeeeeeececseceeceseeaseeeeeeeeees 13 Configuring your Environment to Support Failover sssssssssssssssncssssssssss sossossesonsonssososossssseonosscssisnossssssss sses 15 Dell PowerVa2. Configuration Details This section details the configuration requirements that must be meet in order to support failover using the Dell PowerVault TL2000 or TL4000 library Important Note Failover support is limited to the Dell PowerVault TL4000 when configured with LT04 drives Configuration Samples Please refer to the following diagrams for cabling the supported failover configurations The drive shown as the failover path does not need to be on standby i e not in use for failover to occur Failover Reference Configuration 1 One host one Fibre Channel switch and one Dell PowerVault library with two Fibre Channel drives In this configuration failover occurs if one of the drives in the library fails hardware failure or drive is disconnected from the Fibre Channel switch The physical connection of this configuration is shown in Figure 1 Important Note The Fibre Channel Drive Generation can be LT04 or LTO5 4 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Failover configuration one host one switch two FC drives Main Path Failover Path Figure 1 Reference Configuration 1 Failover Reference Configuration 2 One Host with one dual port Fibre Channel HBA two Fibre Channel switches and one Dell PowerVault with two Fibre Channel drives In this configuration failover occurs if one of the foll
3. Setup The host system must have Microsoft Windows 2003 2008 Or 2008 R2 32 or 64 bit You must install the Dell PowerVault TL4000 device driver on your backup host system The Dell PowerVault TL2000 TL4000 driver can be downloaded from http support dell com Please follow the installation Instructions included in the driver package Verify the OS sees the library There will be a drives listed in the Device Manager for each physical connection to the drive s Backup Application Setup and Support CommVault is the only backup application that currently supports failover Install the backup application please refer to your CommVault documentation for installation instructions Important Note Ensure your CommVault installation install has all the updates required for LTO5 tape support 18 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Note Please follow the steps under Backup Application Setup and Support for Configuring Dual Host Bus Adapters even if your library configuration contains SAS drives or Fibre Channel direct attached drives The configuration settings under Configuring Dual Host Bus Adapters will allow your SAS or direct attached Fibre Channel configuration to support failover Once CommVault is installed there are additional steps to configure failover Access the CommVault failover configuration instructions a
4. for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Failover configuration one host with two HBAs and two SAS drives Main Path Failover Path Figure 3 Reference Configuration 3 Failover Reference Configuration 4 One Host with dual Fibre Channel HBAs two Fibre Channel switches and a Dell PowerVault with two Fibre Channel drives In this configuration failover occurs if one or more of the following occurs One of the drives fails hardware failure or is drive disconnected from the HBA port One of the HBA controllers fails One of the switches fails The physical connection of this configuration is shown in Figure 4 Important Note Dell Recommends Fibre Channel drives to be same generation For Heterogonous configurations refer to section Heterogonous Validated Configurations 7 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Failover configuration Host with dual port HBAs two FC switches and two FC drives Main Path Failover Path Figure 4 Reference Configuration 4 Failover Reference Configuration 5 Two hosts with dual Fibre Channel HBAs two Fibre Channel switches and one Dell PowerVault with two Fibre Channel drives In this configuration failover occurs if one or more of the following occurs One of the drives fails hardware failure or
5. license enabled b For Dell PowerVault TL2000 TL400 with LTO5 drives i CommVault Simpana 8 0 SP4 or later with SAN license enabled ii Patch to support LTO5 tape applied 15 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide e Dell PowerVault TL2000 TL4000 Microsft Windows device driver The driver can be downloaded from Dell support site http support dell com Important Note Please refer to Dell PowerVault Compatibility Matrix for latest supported OS list Backup application and Dell PowerVault Tape configurations http support dell com support edocs stor sys matrix PVMatrix index htm Dell PowerVault TL2000 TL4000 Library Failover Setup Take the Library Offline Before starting the failover configuration process it is important to ensure no backup jobs are running and library resources are not controlled by the tape backup application Follow the instructions for taking the library offline in the Dell PowerVault TL2000 Tape Library and TL4000 Tape Library User s Guide In the event you do not have a copy of this document it can be downloaded from the Dell support site at http support dell com Upgrade Library and Drive Firmware to the Latest Version Ensure your Dell PowerVault TL2000 TL4000 library has the latest library and drive firmware The latest firmware can be found at http support dell com I
6. the OCP 12 31 09 version 2 0 Dell PowerVault TL4000 TL2000 Failover Guide The library validates the entered license key and provides a Failover Enabled message upon successful completion In the event you enter the wrong license key the library returns a Key Not Validated failure message 1 Navigate to Configure gt Path Failover 2 Press the SELECT button to highlight the first digit of the 12 digit license key 3 Use the UP and DOWN buttons to select each digit 4 Press the SELECT button to move to the next digit 5 After entering the final digit press the DOWN button and select one of the following Save to apply your settings Cancel to delete your settings Configure the Dell PowerVault TL2000 TL4000 control path in the secondary drives By default the library has only one control path via drive 1 in the library regardless of the number of drives installed In order to configure control path failover you must enable the control path in the drive settings for the secondary drive Please refer to the Dell PowerVault TL2000 Tape Library and TL4000 Tape Library User s Guide for instructions on enabling control path Enabled control path for all additional drives in the library Bring the Library Back Offline Please refer to the Dell PowerVault TL2000 Tape Library and TL4000 Tape Library User s Guide for instructions on bringing the library back online Backup Host Control Path Failover
7. unload completes Drive replacement or upgrade In order to maintain failover support in the library you must maintain the configuration consistent with the supported failover configurations when replacing a failed drive Not all drive failures will result in a drive replacement Replacing the drive with the same type generation has no effect on failover settings Refer to the PowerVault TL2000 Tape Library and TL4000 Tape Library User s Guide for the drive replacement instructions After the drive is installed you must ensure that the control path for both drives is active Replacing a drive with same generation or upgrading the drive to a newer generation Under these circumstances there is no configuration impact as long as the drive added supports failover The Backup Application configuration must be updated to reflect the new drive s and their serial numbers Remember to turn on the control path on the added drive s Important note Replacing a failover configured drive with an LTO3 drive will result in no failover support without any feedback to the user Information in this document i tion in this d tis subject to ck ithout noti Reproduction in any manner whatsoever without the written permission of Dell Inc is strictly forbidden Trademarks used in this text Dell the DELL logo are trademarks of Dell Inc Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and
8. ary User s Guide for instructions on accessing and navigating the RMU The library validates the entered license key and provides a Failover Enabled message upon successful completion In the event you enter the wrong license key the library returns a Key Not Validated failure message 1 Navigate to Configure Library gt Path Failover 2 Enter the Path Failover 12 digit license key in the spaces provided Pab saver fones Activas toe Ketek awas E Figure 12 PowerVault TL4000 Failover Activation screen 3 Click Activate to save the license key and activate failover on the library The following screen displays if you have correctly entered the license key Pra s Figure 13 PowerVault TL4000 RMU screen after failover has been activated Entering Path Failover Feature Activation Key via Operator Control Panel OCP If you ordered failover at point of sale the envelope containing the failover authorization code is located in the accessory box that came with your unit If you ordered failover after point of sale an envelope containing your failover authorization code was sent to you Please follow the instructions on the failover authorization code certificate to obtain your license key The authorization code you were sent will not activate the feature on the library Please refer to the Dell PowerVault TL2000 tape Library and TL4000 Tape library User s Guide for instructions for navigating with
9. ata 10 Compare the data from the restore job to the original 100 match of the data data Using your method of choice 14 Perform a backup that utilizes both drives in the library Backups begin and run in parallel Jobs finish with success 20 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Failover Performance considerations The failover feature requires the Dell PowerVault TL2000 TL4000 library device driver The additional driver functionality results in a noticeable performance impact 21 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Appendix A Recovering from a failover event Recovering from a data path failover event in the tape backup application The tape backup software application administrator must perform the necessary configuration maintenance to restore the backup system to full operation there is no tape backup application configuration required Drive reset In CommVault navigate to the Storage Resources Libraries your failed library Master pool Right click on the failed drive and select reset A message box appears asking the user to confirm drive reset Select ok At this point the media in the drive is unloaded A Media Recovery message will be posted in the CommVault event viewer after the tape
10. ence Configuration 9 Important Note This configuration can be extended up to four drives provided the host system can support four dual SAs HBAs Heterogeneous validated configurations Heterogonous configurations have some limitations if the configuration contains LT04 and LTO5 drives the Library must contain only LTO4 media for proper operations Important Note Heterogeneous configurations containing LTO3 drives are not supported Failover Reference Configuration 10 One host one Fibre Channel switch and one PowerVault library configured with one LT04 Fibre Channel and one LTO5 Fibre Channel drive In this configuration failover occurs if one of the drives in the library fails hardware failure or drive is disconnected from the Fibre Channel switch The physical connection of this configuration is shown in figure 10 13 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Failover configuration one host one switch two FC drives Main Path Failover Path Figure 10 Reference Configuration 10 Failover Reference Configuration 11 One host with two dual port SAS HBAs and one PowerVault with one LT04 SAS and LT05 SAS drive In this configuration failover occurs if one of the drives in the library fails hardware failure or drive is disconnected from the HBA In the event a single port in the SAS drive fails fa
11. f a firmware upgrade is needed follow the instructions included in the firmware download package located at http support dell com Apply the failover license to the library In order to support failover a license must be entered into your library If a license is needed please contact your Dell technical sales representative Follow the steps provided with your failover documentation to obtain the license for your library Failover can be enabled via the Remote Management Unit RMU or the Operator Control Panel OCP Select the method you prefer and follow the instructions below Entering Path Failover License Activation Key via the Remote Management Interface RMU If you ordered failover at point of sale the envelope containing the failover authorization code is located in the accessory box that came with your unit If you ordered failover after point of sale an envelope containing your failover authorization 16 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates 17 Page Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide code was sent to you Please follow the instructions on the failover authorization code certificate to obtain your license key The authorization code you were sent will not activate the feature on the library Please refer to the Dell PowerVault TL2000 Tape Library and TL4000 Tape Libr
12. ge 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Drive LTO3 Drives LT04 Drives LTOS Drives Configuration t 8 Supported Failover Supported Failover Supported Failover Drive Support Drive Support SCSI Full Height Yes FC Full Height Yes FC Half Height SAS Full Height Yes SAS Half Height Table 2 Dell Power Vault TL4000 Supported Failover Configuration Matrix Requires a Dell PowerVault TL4000 library configured with at least two LTO5 Half Height drives two homogeneous LTO4 drives are needed in the same partition to support full path failover If only one LTO4 SAS drive is installed in the library or in the partition data path failover only is supported Basic Environment Configuration Requirements There are some basic configuration environments that are required in order to support the failover feature available in the Dell PowerVault TL2000 TL4000 library Refer to table below for full details Important Notes Mixed drive generations are not recommended however if a library contains mixed generation drives in a single partition and failover is a desired configuration you must follow the LTO5 environment configuration requirements and the library must contain only LT04 media for backups Failover is supported with a single LTO4 SAS drive installed in the TL4000 library or in a single library partition h
13. igure 6 9 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Single SAS Drive Failover Configuration one host with two HBAs and One SAS drive Main Path Failover Path Figure 6 Reference Configuration 6 Failover Reference Configuration 7 One host with two Fibre Channel HBAs one Fibre Channel switch and one Dell PowerVault with a Single Fibre Channel drive In this configuration failover occurs only if one of the HBAs fails This configuration only supports data path failover as there is no second drive to failover the control path The physical connection of this configuration is shown in Figure 7 10 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Single FC Drive Failover configuration Two HBA adapters One FC switch and one FC drive Main Path Failover Path Figure 7 Reference Configuration 7 LT0O5 Specific Requirements For Failover Support The introduction of LTO5 drive support in the Dell PowerVault TL2000 and TL4000 allowed additional failover configurations These configurations are unique to the Dell PowerVault TL2000 and TL4000 configured with LTO5 devices and do not extend to LT04 configurations Important Note Failover is only supported on Dell PowerVault TL2000 when configured wi
14. ilover will take effect and data will be streamed onto the same drive using the second SAS connection In the event a SAS drive fails failover will result on control path and data moved to the additional drive in the library The physical connection of this configuration is shown in Figure 11 14 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Failover configuration one host with two HBAs and two SAS drives Main Path Failover Path Figure 11 Reference Configuration 11 Configuring your Environment to Support Failover Ensure you have the following for successful environment configuration e Dell PowerVault TL2000 or TL4000 configured with failover capable drives Please refer to failover configuration support matrix e Anetwork connection to your Dell PowerVault TL2000 TL4000 library for management purposes Refer to the Dell PowerVault TL4000 TL2000 Tape Library User s Guide for more information e A Dell PowerVault TL4000 TL2000 Tape Library failover license e Ahost system configured with as many tape connections needed for your environment e Enough cables to make the necessary connections needed for your environment e A Fibre Channel switch if utilizing a Fibre Channel configuration e CommVault Backup Application a For Dell PowerVault TL4000 with LT04 drives i CommVault Galaxy 6 1 SP4 or later with SAN
15. is drive disconnected from the HBA port One of the HBA controllers fails One of the switches fails The physical connection of this configuration is shown in Figure 5 Important Note Dell Recommends Fibre Channel drives to be same generation For Heterogonous configurations refer to section Heterogonous Validated Configurations 8 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Multiple Host Failover configuration two hosts two FC switches and 2 FC drives Main Path Failover Path Figure 5 Reference Configuration 5 Note that a SAN environment is susceptible to backup performance issues due to the sharing of resources across multiple hosts A failover event in the system can potentially complicate the performance issues Failover is a means to maintain the data storage flow in the event of a failure along the communication path between the host and the drive or library but the environment manager must monitor the state of the system to ensure all the paths are active Failover Reference Configuration 6 One host with dual port SAS HBA and one Dell PowerVault with a single SAS drive In this configuration failover occurs only if one of the HBAs fails This configuration only supports data path failover as there is no second drive to failover the control path The physical connection of this configuration is shown in F
16. names or their products Dell Inc disclaims any proprietary interest in trademarks and trade names 221 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates
17. onstrate restoring the unit after a failover event Failover Test Procedure Procedure Step Namber Test Procedure Expected Result 1 Configure your library per the instructions in this Configuration is complete and document library is configured in CommVault 2 Verify your library is accessible by running a small backup Job completes successfully job with a piece of scarp media Start a new backup to a single tape drive Backup starts without error 3 Make note of the job ID When the backup reaches the 50 mark disconnect the Error message will be displayed in cable from the back of the tape drive actively running the CommVault Event Viewer 1 O 4 Media fails to unload Job status goes to a pending state Let job sit in Pending state for 5 minutes Job restarts New media is loaded into the second 5 Right click the Job and select Resume drive and job completes l Media is unloaded 6 Start another backup job to the library Backup starts and completes Repair the broken link created in step 4 Device Manager shows device 7 correctly Verify OS recognizes the device Reset the library drive that contains the stuck tape from Drive unloads the media 8 step 2 Refer to appendix A in this document Perform a restore of the Job ID noted in step 3 Restore begins and completes without error This will be the backup job that contained the failover 9 event Direct the restore job to an alternate location for file comparison of the original d
18. owever only data path failover can be configured Two homogeneous LTO4 drives are required in the same library partition to support full path failover 3 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Two homogeneous Fibre Channel or SAS LTO4 full height drives in a single library partition Control path enabled on all drives in the partition Microsoft Windows 2003 Windows 2008 or Windows 2008 R2 installed in the host server Dell PowerVault TL4000 library device driver running on host server CommVault Galaxy 6 1 SP4 or later or Commvault Simpana 7 0 SP4 or later installed in the host system Failover activated via license key on the Dell PowerVault TL4000 library Shared Storage license applied to the Dell PowerVault TL4000 TL2000 Failover Guide Two or more homogeneous Fibre Channel or SAS LTOS drives in a single library partition Control path enabled on all drives in the partition Microsoft Windows 2003 Windows 2008 or Windows 2008 R2 installed on the host server Dell PowerVault TL4000 TL2000 library device driver running on host server CommVault Galaxy 7 0 SP4 or later installed in the host system Failover activated via license key on the Dell PowerVault TL4000 or TL2000 library Shared Storage license applied to the CommVault backup application CommVault backup application Table 3 Failover Configuration Requirements Failover Support
19. owing occurs One of the drives in the library fails hardware failure or drive is disconnected from the Fibre Channel switch One of the switches fails One of the HBA ports fails The physical connection of this configuration is shown in Figure 2 Important Note Dell Recommends Fibre Channel drives to be same generation For Heterogonous configurations refer to section Heterogonous Validated Configurations 5 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Failover configuration one host two HBAs two switches two FC drives Main Path Failover Path Figure 2 Reference Configuration 2 Failover Reference Configuration 3 One host with dual port SAS HBAs and one Dell PowerVault with two SAS drives In this configuration failover occurs if one of the following occurs One of the drives fails hardware failure or is drive disconnected from the HBA port One of the HBA ports fails One of the ports in a drive fails This configuration takes full advantage of path failover it is protected via data and control path The physical connection of this configuration is shown in Figure 3 Important Note Dell Recommends Fibre Channel drives to be same generation For Heterogonous configurations refer to section Heterogonous Validated Configurations 6 Page 12 31 09 version 2 0 Always refer to www dell com support
20. rnate path when a permanent error occurs on the primary path The failover event is enabled by the tape library and handled by the device driver making it transparent to the running Backup Application There are two types of Path Failover Data Path Failover DPF and Control Path Failover CPF They are closely related however the difference is that DPF is an automatic failover support for the transfer of data which provides error recovery for systems connected to tape drives while CPF is an automatic failover support for the transfer of commands to move tape cartridges Please refer to the Failover supported configuration sections of this document for examples of different configurations that can be constructed Dell PowerVault TL2000 TL4000 Configuration Support matrix The configuration matrix section provides a quick reference to drive configurations that support failover in a Dell PowerVault TL2000 or TL4000 library Important Note Failover is not supported for any configuration containing LTO3 drives Drive LTO3 Drives LTO4 Drives LTO5 Drives Configuration t Supported Failover Supported Failover Supported Failover Drive Support Drive Support SCSI Full Height Yes FC Full Height Yes FC Half Height SAS Full Height Yes SAS Half Height Table 1 Dell PowerVault TL2000 Supported Failover Configuration Matrix Requires a Dell PowerVault TL2000 library configured with two LTO5 Half Height drives 2 Pa
21. t http www commvault com e Navigate to the Services tab e Select Support Services then Documentation e Select the Books Online link for your software version e Select the search option located in the upper right side of the page e Search for keywords SAN Attached Libraries e Locate the article named SAN Attached Libraries and follow the instructions provided for Configuring Dual Host Bus Adapters HBA Once CommVault is correctly configured for failover the screen shown in Figure 14 below is displayed F threry and Orive onhageretron Coneenerwe Host 2906 2 fly concra B8 Cappy Manager EA Shared Dak Device D brr 5 BP m EUr I c f trary Cortroticr e RON r TLL Koon gured detected EN 3673 TLiScsH4i0 0 3 2900 2 Kconfiqured detected J hutama BH 73T aBiconfig scd Dei ve Pook 2902 PO Povo ed gt 1 TEM LE T3550 104_1 Scs4 0 0 Oplconfigwed detected GD 2 BMA LA T2650 T04 29 Se25 0 0 DiplcorFepwed chetmched Figure 14 Fully configured CommVault Application 19 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Failover Configuration Verification Follow the steps in the table below to test your configuration was completed successfully The test procedure will take you through a user induced failover event to validate the configuration demonstrate the failover behavior and dem
22. th LTO5 drives Failover Reference Configuration 8 One host with two Fibre Channel ports one Fibre Channel switch and a Dell PowerVault configured with three Fibre Channel drives In this configuration failover occurs if one or more of the following occurs One of the drives fails hardware failure or is drive disconnected from the HBA port One of the Fibre Channel ports in the HBA fails 11 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Failover configuration one host two FC HBAs One FC switch three FC drives Main Path Failover Path Figure 8 Reference Configuration 8 Important Note This configuration can be extended to up two four LTO5 drives Failover Reference Configuration 9 One host with three dual port SAS HBAs and a Dell PowerVault configured with three SAS drives In this configuration failover occurs if one or more of the following occurs One of the drives fails hardware failure or is drive disconnected from the HBA port One of the HBA controller port fails One port in a SAS drive fails 12 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide Failover configuration one host with three dual port HBAs and three SAS drives Main Path Failover Path Figure 9 Refer
23. ult TL2000 TL4000 Library Failover Setup sssssssessssssssssssssssrnsensnsssesssnnnnnnseressesessseeseens 16 Tone wie HOTAT Y CE a aanere EAE INSEE NEEE ENE AEAEE OEA A 16 Upgrade Library and Drive Firmware to the Latest Version cccccssseeceeceseeeeceeseeeceeeeseceeeeeecceseeeeeees 16 Backup Host Control Path Failover Setup nsessennsssssnserenssresssnsesssssreresssessssesereneesessssennssnerrseeeessseesrsseeree 18 Eee UI Application Setup and ERIE sacdde cp veneniivndvanscixavncinndivnadieavecesteea ITER E EAREN ARER E 18 eli g e gah ahon Verme aO en nn AEE SA eee ee ee ee 20 eT ie FI riapro ar na EAEE NE EAREN EEEE EEEE 20 Failover Performance considerations si raisvesicatssniasnvacissscutananssevenixednsscmsnsabiesusecensussipiusssciusacnsnssasauiaesiaaiaccnenaass 21 Appendix A Recovering from a failover event ccceesseecccsseecceeeseececceeeceeeceeecceceeeecceeeueececseeeecseeaeeeess 22 1 Page 12 31 09 version 2 0 Always refer to www dell com support for latest documentation and updates Dell PowerVault TL4000 TL2000 Failover Guide What is Failover Failover is an optional feature available for the Dell PowerVault TL4000 and TL2000 Tape libraries Failover is designed to provide automatic path failover to a preconfigured redundant path in the event that a host adapter or control path drive is lost without aborting the current job in process Failover provides error recovery on an alte
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