Archiving Methods; Cartridge Copy; Why Use The Copy Functionality - HP StorageWorks D2D100 - Backup System User Manual

Archiving methods

Two methods are provided for archiving data to the directly attached tape storage device, these are
Copy and Export.
• Copy retains the data cartridge on the HP D2D Backup system and creates an exact copy onto a
physical cartridge in the attached tape storage device.
• Export removes the data cartridge from the library on the HP D2D Backup System once data has
been successfully copied to the physical cartridge in the attached tape storage device.
Each method has advantages and disadvantages, as described in more detail below.
NOTE:
As a general recommendation, Copy is the easier of the two options to use because it does not remove
the data from the HP D2D Backup System and can be managed completely from the Web Management
Interface. Only use the Export option, if you need to free up some disk space. Export (and Import) require
additional steps in the backup application.

Cartridge copy

The backup application on the host is used to back up data to a cartridge on the library device in the HP
D2D Backup System. The Web Management Interface on the HP D2D Backup System is used to Copy
the cartridge from the HP D2D Backup System to the attached tape storage device, leaving the data on
the HP D2D Backup System so that it is available for quick restore.
Step 1
Use backup application on
host to write to cartridge.
HP StorageWorks D2D Backup System
Figure 53 Cartridge copy

Why use the Copy functionality?

Copy creates two instances of the same cartridge; one stored on the HP D2D, the other on physical tape.
Logically these are the same cartridge and the backup application has no awareness that there are two
copies. If data from this cartridge is required for restore, the backup application will always restore the
data from the HP D2D if it is available. The physical cartridge is, therefore, an additional copy that will
be required only if the HP D2D is not available.
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Using Tape Attach
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Library
Step 2
Use HP D2D Web
Management Interface to
copy to tape drive.
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Library
HP StorageWorks D2D Backup System
Physical
Tape Drive
Cartridge