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
Number
Configure your library per the instructions in this
1
document
Verify your library is accessible by running a small backup
2
job with a piece of scarp media
Start a new backup to a single tape drive.
3
Make note of the job ID.
When the backup reaches the 50% mark disconnect the
cable from the back of the tape drive actively running
I/O.
4
Let job sit in Pending state for 5 minutes.
5
Right click the Job and select Resume.
6
Start another backup job to the library.
Repair the broken link created in step 4
7
Verify OS recognizes the device
Reset the library drive that contains the "stuck" tape from
8
step 2. Refer to appendix A in this document
Perform a restore of the Job ID noted in step 3
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 data.
Compare the data from the restore job to the original
10
data. Using your method of choice
Perform a backup that utilizes both drives in the library.
11
20 | P a g e
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Test Procedure
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Expected Result
Configuration is complete and
library is configured in CommVault
Job completes successfully
Backup starts without error.
Error message will be displayed in
the CommVault Event Viewer.
Media fails to unload.
Job status goes to a pending state.
Job restarts.
New media is loaded into the second
drive and job completes.
Media is unloaded.
Backup starts and completes.
Device Manager shows device
correctly.
Drive unloads the media.
Restore begins and completes
without error.
100% match of the data.
Backups begin and run in parallel.
Jobs finish with success.
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