HP B6960-90078 manual Appending Backups to Media, Limitation

Managing Media

Appending Backups to Media

	Appending Backups to Media
	Data Protector allows you to add new backups to media which already
	contain backups. This method conserves media space.
Limitation	Backups cannot be appended on media used in Travan devices.
	The appendable media usage policy can be selected when configuring a
	media pool. Appendable media contain some currently protected objects;
	the media must be in good condition and must not be full.
	If several devices are used with load balancing, the appendable concept
	applies on a per device basis, that is, each device uses an appendable
	medium (if available) as the first medium in a backup session. The
	backup sessions appending data on the same medium do not have to use
	the same backup specification.
	Two alternatives of appendable media usage policies are available:
	• Appendable: The first medium used in a backup session uses the
	space remaining on the medium from the previous backup session. If
	several appendable media are available in the pool, the least recently
	used medium is used first. If additional media are needed during the
	same backup session, they must be free and not contain any protected
	backups. For this media usage policy, the type of backup (full or
	incremental backup) can be mixed in any order on the media.
	• Appendable on incrementals only: The first medium used in a
	backup session is appended to only if an incremental backup is
	performed. If several appendable media are available in the pool, the
	least recently used medium is used first. If additional media are
	needed during the same backup session, they must be free and not
	contain any protected backups. This media usage policy will create
	media which will contain a full backup, followed by any number of
	incremental backups.
TIP	If you want to create tapes which contain only one full backup and the
	incremental backups related to the same client, configure Data Protector
	as follows:
	• Configure one pool per client with the media usage policy Appendable
	on Incrementals only.

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