Managing Media
Using a Pre-Allocation List of Media for Backup
Chapter 4 119
Using a Pre-Allocation List of Media for
Backup
You can specify the order in which media from a media pool will be used
for backup. This order is called a pre-allocation list. You specify the
pre-allocation list when configuring a backup. The purpose of a
pre-allocation list is to control which media will be used for a backup
session. You have to match the pre-allocation list with the available
media before each backup.
Depending on the allocation policy of the media pool, Data Protector
behaves in two different ways:
• If the pre-allocation list is used in combination with the Strict
media allocation policy, Data Protector expects the media in a backup
device to be available in that order. If the media are not available,
Data Protector issues a mount request. If the media mentioned in the
pre-allocation list are loaded in a SCSI-II exchanger, Data Protector
handles the media sequence automatically.
• If the pre-allocation list is used in combination with the Loose media
allocation policy, media in the pre-allocation list are used first. If the
media are not available, any suitable media in the library are used.
Preallocating
Media for Backup
On how to preallocate media for backup, refer to the online Help index
keyword “preallocating media”.
