Considerations For Restores; Restoring From Disk Backup Device; Restoring From Backup Application-Created Tape Copy; Restoring From The Replication Target - HP 12000 Design Manual

have a different barcode, retention time, contents, and potentially a different size from the replication
target media. To create archive tapes from the replication target media, you must use a second
instance of the backup application to perform this. (See
The backup application must have the ability to "import" tapes created on one backup application
domain into another domain (for example, importing a cartridge from a Data Protector cell server
to another cell server). You can do this manually by checking the replication status in the GUI and
starting the import in the backup application, or it can also be done automatically via a script. The
VLS the script can be driven by an "ISV Email" report. See
for details and example scripts.
CAUTION:
job. Do not use any method other than the two mentioned above to initiate copying.

Considerations for Restores

There are two restore use models: from tape and from the VLS. In either case, copies are in native
tape format and so can be restored directly. Retention policies drive copy and restore use models.

Restoring from Disk Backup Device

Restore from the VLS is performed in the same way that restore from tape is done. Simply direct
your backup application to do the restore.
NOTE: A restore from one tape can be performed at the same time as a backup to a different
tape.

Restoring from Backup Application-created Tape Copy

The format of physical tapes used in the VLS environment is the same as the format in environments
not using a virtual tape library. To restore from tape, place the tape in a library or drive that the
host has access to and restore.
Time to retrieve media is a factor in recovery time. Depending on the location of your vault
and the media management within the vaulting process, retrieval time can be a key part of
recovery time.
Recovery from tape can be slower than recovery from disk.

Restoring from the Replication Target

Consider a use case after a site disaster where the local VLS device is unavailable and the restore
must be performed from the replication target device instead. The methods of performing disaster
recovery restore from a replication target are:
Restore directly from target device.
The replicated cartridges in the target device are all native format (so they can be restored
directly by a backup application). After presenting the replication target to a replacement
backup application and restoring its media database, you can restore your servers from the
VLS. See
Restore over LAN/WAN.
This option is where some or all of the source device is rebuilt by restoring the replicated
cartridges over the LAN/WAN back from the target to the source. This is a wholesale
(non-deduplicated) restore so can only restore a subset of the source device such as the last
backup set. (See
36 Backup Solution Design Considerations
Copying a tape before replication has completed can result in failure of the replication
Restore Directly from the VLS Target
Restore the VLS over the
Creating Archive Tapes from the
Creating Archive Tapes from the Target
Device.
LAN/WAN.)
Target.)