HP B6960-96035, Руководство по концепциям

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else, does not matter; it always belongs to its pool until it is recycled and exported
from the cell.
Several devices can use media from the same pool.
Media pool property examples
Examples of pool properties are:
• appendable
This allows Data Protector to append data to the media in this pool when
performing subsequent backup sessions.
If this option is not selected, then the media will contain data from a single session
only.
• append incrementals only
A backup session appends to a medium only if an incremental backup is
performed. This allows you to have a complete set of full and incremental backups
on the same medium, if there is enough space.
• media allocation policy
There are several levels of strictness as to which media can be used for backup.
They range from strict, where Data Protector requires a specific medium, to loose,
where Data Protector accepts any suitable medium in the pool, including new
(blank) media.
Every device is linked to a default pool. This pool can be changed in the backup
specification.
For information on other media pool properties, see the online Help index: “media
pools, properties of“.
Media pools and
dcbf
directories
Data Protector allows you to set a target
dcbf
directory for a media pool. This means
that information about all media from the media pool is stored in the specified
dcbf
directory.
For information on the DCBF part of the IDB and
dcbf
directories, see “ IDB
architecture ” on page 189.
How to use media pools
The usage of pools depends mainly on your preferences. For example, pools can be
defined using criteria like:
Media management and devices 136