Disadvantages Of Copy; Cartridge Export - HP StorageWorks D2D100 - Backup System User Manual

use with restores at a later date. If a restore is urgently required, the administrator can put the
copied cartridge into a physical tape drive attached to the host and restore directly from that. In
either case, the backup application is aware of the cartridge's existence.
• Both the D2D system and the host are lost. In this case, the physical cartridge copy (as long as it
was a full system backup) can be used for disaster recovery onto new or repaired server hardware
using a tape device attached to the host server.

Disadvantages of Copy

1.
Data is left on the HP D2D Backup System; no disk space is freed by copying to physical
cartridge.
2.
It is possible for the backup application to overwrite the cartridge on the HP D2D Backup System
and thus become unaware of the data that has been copied to the physical cartridge.

Cartridge export

The backup application on the host is used to back up data to a slot on the library device (or to a
standalone tape drive device) in the HP D2D Backup System. It is also used to move the data from the slot
into the mail slot. This creates an empty slot where the data was moved.
The Web Management interface on the HP D2D is used to Export cartridge data from the mail slot on the
HP D2D Backup System to the attached tape drive. After a successful export, the data is removed from
the HP D2D Backup System and the mail slot becomes empty. (If the export fails, the data remains in the
mail slot.) Export removes the data and frees up disk space on the HP D2D Backup System and is useful
for long term archival (for example in a yearly tape in a rotation scheme). If restore is needed, data
can be imported (or moved back) into the HP D2D Backup System. Export is not recommended with
deduplicating libraries as it does very little to free up disk space, which is the prime reason for export.
(Space is only freed up, if a chunk of data is no longer referenced by any cartridges.)
CAUTION:
Do not export cartridges that the backup application uses on a frequent basis as part of a rotation
strategy because it will not be able to write to the empty slot.
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Export, import and copy using an attached tape drive