Dell PowerVault TL2000 Configuration Manual
Failover configuration guide
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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
What is Failover?........................................................................................................................................... 2
Dell PowerVault™ TL2000/TL4000 Configuration Support matrix ............................................................... 2
Basic Environment Configuration Requirements.......................................................................................... 3
Failover Support Configuration Details......................................................................................................... 4
Configuration Samples.................................................................................................................................. 4
LT05 Specific Requirements For Failover Support ...................................................................................... 11
Heterogeneous validated configurations ................................................................................................... 13
Configuring your Environment to Support Failover.................................................................................... 15
Dell PowerVault™ TL2000/TL4000 Library Failover Setup.......................................................................... 16
Take the Library Offline............................................................................................................................... 16
Upgrade Library and Drive Firmware to the Latest Version ....................................................................... 16
Backup Host Control Path Failover Setup ................................................................................................... 18
Backup Application Setup and Support ...................................................................................................... 18
Failover Configuration Verification ............................................................................................................. 20
Failover Test Procedure .............................................................................................................................. 20
Failover Performance considerations ......................................................................................................... 21
Appendix A - Recovering from a failover event .......................................................................................... 22
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Related Manuals for Dell PowerVault TL2000
Summary of Contents for Dell PowerVault TL2000
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Page 1: Table Of Contents
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 What is Failover?............................2 Dell PowerVault™ TL2000/TL4000 Configuration Support matrix ............... 2 Basic Environment Configuration Requirements..................3 Failover Support Configuration Details......................4 Configuration Samples..........................4 LT05 Specific Requirements For Failover Support ..................11 Heterogeneous validated configurations ....................13 Configuring your Environment to Support Failover..................15 Dell PowerVault™ TL2000/TL4000 Library Failover Setup................16 Take the Library Offline..........................16 Upgrade Library and Drive Firmware to the Latest Version ............... 16 Backup Host Control Path Failover Setup ....................18 Backup Application Setup and Support ...................... 18 ... -
Page 2: What Is Failover
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 alternate 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 LT03 drives Drive LT03 Drives LT04 Drives LT05 Drives Configuration Supported Failover Supported Failover Supported Failover Drive Support ... -
Page 3: Basic Environment Configuration Requirements
Dell PowerVault™ TL4000/TL2000 Failover Guide Drive LT03 Drives LT04 Drives LT05 Drives Configuration Supported Failover Supported Failover Supported Failover Drive Support Drive Support Drive Support SCSI Full Height Yes No FC Full Height Yes No Yes Yes * ... -
Page 4: Failover Support Configuration Details
Microsoft Windows 2003, Windows 2008, or Windows 2008 R2 installed in the host or Windows 2008 R2 installed on the host server server • • Dell PowerVault™ TL4000 library device Dell PowerVault™ TL4000\TL2000 library driver running on host server device driver running on host server • • CommVault Galaxy 6.1 SP4 or later or CommVault Galaxy 7.0 SP4 or later ... - Page 5 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 following 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 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ...
- Page 6 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 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ...
- Page 7 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 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ...
- Page 8 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 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 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ...
- Page 9 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 Figure 6. 9 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ...
- Page 10 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 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ...
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Page 11: Lt05 Specific Requirements For Failover Support
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 LT05 Specific Requirements For Failover Support The introduction of LT05 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 LT05 devices and do not extend to LT04 configurations. Important Note: Failover is only supported on Dell PowerVault™ TL2000 when configured with LT05 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 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ... - Page 12 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 LT05 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 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ...
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Page 13: Heterogeneous Validated Configurations
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: Reference 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 LT05 drives, the Library must contain only LT04 media for proper operations. Important Note: Heterogeneous configurations containing LT03 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 LT05 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 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ... - Page 14 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, failover 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 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ...
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Page 15: Configuring Your Environment To Support Failover
• Enough cables to make the necessary connections needed for your environment • A Fibre Channel switch if utilizing a Fibre Channel configuration • CommVault Backup Application a. For Dell PowerVault™ TL4000 with LT04 drives i. CommVault Galaxy 6.1 SP4 or later with SAN license enabled b. For Dell PowerVault™ TL2000/TL400 with LT05 drives i. CommVault Simpana 8.0 SP4 or later with SAN license enabled ii. Patch to support LT05 tape applied 15 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ... -
Page 16: Dell Powervault™ Tl2000/Tl4000 Library Failover Setup
Dell PowerVault™ TL4000/TL2000 Failover Guide • 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. If 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 ... - Page 17 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 Library ™ 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 → Path Failover. 2. Enter the Path Failover 12‐digit license key in the spaces provided. 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. 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 the OCP. 17 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ...
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Page 18: Backup Host Control Path Failover Setup
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 → 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 Setup The host system must have Microsoft Windows 2003, 2008 0r 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 LT05 tape ... - Page 19 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 at http://www.commvault.com/. • Navigate to the Services tab • Select Support Services then Documentation • Select the Books Online link for your software version • Select the search option located in the upper right side of the page • Search for keywords "SAN‐Attached Libraries” • 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. Figure 14: Fully configured CommVault Application 19 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 ...
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Page 20: Failover Configuration Verification
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 demonstrate restoring the unit after a failover event. Failover Test Procedure Procedure Step Test Procedure Expected Result Number Configure your library per the instructions in this Configuration is complete and document library is configured in CommVault Verify your library is accessible by running a small backup... -
Page 21: Failover Performance Considerations
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 | P a g e 1 2 / 3 1 / 0 9 v e r s i o n 2 . 0 Always refer to www.dell.com\support for latest documentation and updates ... -
Page 22: Appendix A - Recovering From A Failover Event
Information in this document is subject to change without notice. © 2010 Dell Inc. All rights reserved. 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.