Design Considerations; Automigration Use Models - HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual

user in this example set the retention time for seven days. Therefore, if there is a need to do a
restore within the 7–day retention period, the user can simply move a cartridge from the firesafe,
and use the backup application to do the restore. When the seven-day retention period passes,
the virtual cartridges are deleted, at which point a physical tape is needed for restore operations.
See Restoring from Automigration
5. Thirty days have passed. The truck returns with the physical tapes previously transported off-site
that are now to be recycled.
6. The media life cycle starts again. The recycled tapes are loaded into the destination library using
Load Media for Overwrite. After scanning the tape headers, automigration automatically creates
virtual cartridges with matching headers. At this point, both the virtual and the physical cartridges
are ready to back up data again.

Design Considerations

Automigration Use Models

The following sections give examples of backup and restore use cases for automigration.
Backup to Non-shared Virtual Libraries
In this use case, the customer has multiple virtual libraries on the VLS device, and each virtual library
is mapped to a different backup server. In other words, there is no SAN-sharing of virtual library
resources. Instead, there is a dedicated, non-shared virtual library for each backup server. This is a
possible scenario for SMBs who use backup applications that cannot be SAN-shared across multiple
backup servers (for example, single-server backup applications). This situation could also occur with
a large enterprise that has multiple different types of backup applications in the same SAN (for
example, due to company acquisitions). In both cases, copying to tape via the backup application is
very difficult because without SAN sharing of the virtual libraries, the customer needs a separate tape
drive/library for every backup server. With automigration, the customer can use a single tape library
and effectively share it across the multiple virtual libraries. See
Media.
HP StorageWorks VLS and D2D Solutions Guide
Figure 63.
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