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.

Chapter 4

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HP B6960-90078 manual Appending Backups to Media, Limitation, Appendable on incrementals only The first medium used in a