HP BB118BV - StorageWorks Data Protector Express Package Addendum page 12

10 Daily Append Rotation Type
You cannot edit the properties of the daily backups, they are always incremental. But you
can edit some of the properties of the weekly backup, such as the Day of week when it
occurs.
The Number of rotation sets corresponds to the number of media sets that you wish to
use. The default of 4 assumes four weekly backups before the next rotation. If you have
fewer or more media sets, you can change the Number of rotation sets. For example, if
your backup policy requires you to back up data to tape and retain it on tape for only one
week and the weekly full and daily incremental backups fit onto one media, you only
require one piece of media that may be left constantly in the tape drive. Simply change
the Number of rotation sets to 1 when you create the job.