Owner's manual

Physical
Tape Drive
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4
5
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8
Autoloader
HP StorageWorks D2D Backup System
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Autoloader
HP StorageWorks D2D Backup System
Mailslot
Cartridge
2
slotMail
Step 2
Use HP D2D Web
Management Interface to
export to tape drive.
Step 1
Use backup application on
host to move cartridge to mail
slot.
Figure 37 Cartridge expor t
Why use the Export functionality?
ThemainreasonforusingExport is to create more space on the HP D2D Backup System. If space is not
an issue, Copy is the recommended method for creating offsite backups, because it is controlled solely
from the Web Managem ent Interface and will not impact any tape rotation strategy. Export involves use
of the backup application. It is directly analogous to moving a cartridge in a physical autoloader to a mail
slot (import/export element) so that the backup adm inistrator can take it offsite or put it into a firesafe.
Only a single copy of the cartridge exists. It is on physical tape and no longer on the cartridge in the HP
D2D Backup System. The backup application is fully aware that the cartridge location is now offsite, so
cannot overwrite it without explici tly asking for the cartridge to be m oved back into the autoloader.
The main advantage of Export is that it frees up disk space on the HP D2D Backup System. However,
care must be taken to ensure that future backups do not fail. For example, if a weekly backup tape is
"expo
rted", it will not be available for append or overwrite the next time it is required. Depending on
the b a
ckup application configuration it may be possible to simply create a new blank cartridge in the
auto
loader for use the next time a weekly ba ckup is required, however, in some configurations it will be
nece
ssary to re-import the physical copy in order for the next backup to occur successfully.
When would Export be used?
Cartridge exports are likely to be used when the user wishes to free up space on the HP D2D Backup
System by exporting to physical tape a cartridge that is used infre quently. For example, if a rotation
scheme uses t welve monthly tapes, it is safe to export a m onthly tape from t wo months ago because it will
not now be required (except for infrequent restores) for another ten months. The same applies to yearly
tapes which may never be required again as they are kept forever.
Wh
en would I restore from an exported cartridge?
Re
storing from an "exported" cartridge has a higher likelihood than from a co pied cartridge, because
t
he data no longer resides on the HP D2D Backup System. If a restore from a n "exported" cartridge is
r
equired, the backup application will ask for the cartridge to be re-imported into the HP D2D before it c an
b
e used for restore. Exported cartridges may also be used for disaster recovery, as with copied cartridges.
Disadvantages of Export
1. Restores may take longer if a physical cartridge is required for the restore.
D2D Backup System
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