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 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
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 LT03 drive will result in no failover support
without any feedback to the user.
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