HP StoreOnce 2700, 4500, 4700 and 4900 Backup System User Guide

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.
Best practices for using this feature
WARNING! Failure to follow best practices may cause instability and damage to your backup
system and data. Cartridges can be marked as unusable or the backup application can attempt
to write to target cartridges.
• Verify no replication jobs to the selected target cartridge are in progress.
• Verify no backup jobs to the mapped source cartridges are scheduled.
• Verify the backup application media server instance to be used is not within the same
cell/domain that can access the source cartridge.
• Import the data on the target cartridge into the backup application (this operation must be
repeated after each replicate operation to the cartridge).
• Perform the desired operation on the cartridge, which may be:
Verify the cartridge using the backup application either with a verify command or by
performing a restore.
◦
◦ Copy the cartridge to a physical tape device connected to the media server.
How is a target device made visible?
1. Create the replication mapping as normal. See Running the replication wizard (virtual tape
devices) (page 74), as appropriate.
2. From the host that has access to the target library on the VTL — Libraries page, select the
target library in the Libraries list.
3. Click Edit.
4. The Port defaults to None. Select the appropriate Fibre Channel or iSCSI Port.
5. Click Update.
6. Make the target library visible from other hosts. Configure the Fibre Channel fabric to make
the host visible. Target visibility persists even if the power fails or if the replication mapping
is removed.
NOTE: To remove target visibility, reset the Port to None.
Make Replication Target libraries visible to the host 39