HP StoreOnce VSA Backup System User Guide (TC458-96025)

The move and unload options may be useful to re-align the library configuration against the backup
application. For example, if the backup application has crashed or if the backup application does
not support the Move Medium command, the library and the backup application can become out
of sync.
NOTE: You cannot move or unload cartridges that are in the delete pending, erase pending, or
create state.
Make Replication Target libraries visible to the host
NOTE: See Replication functions (page 50) for more details on replication configuration.
Replication Target libraries are not normally visible to the host, but you can configure devices to
make them visible to backup applications. This allows the backup application to:
• Move cartridges from storage slots to drives in the library.
• Perform read and verify operations on the cartridge (but not write).
• Perform load/unload operations on the tape device.
WARNING! Use with care. If the backup application can see both source and target libraries,
the application cannot distinguish between the source library and the target library because the
barcodes are duplicated in the two locations.
Why make target libraries visible?
It may be useful to make a target library visible to the backup application on the host to:
• Confirm replication is working correctly and check the integrity of the replicated backup by
doing a test restore.
• Perform manual tape copy jobs (sometimes called tape offload) to any tape device on the
network using the backup application.
IMPORTANT: You cannot change data on a Target library cartridge; you may only load it
temporarily into a physical tape device to read it.
28 VTL (Virtual Tape Libraries) functions