Use
BRBACKUP or BRARCHIVE automatically selects the volumes that are recommended for the next backup. The name of the mounted volume is compared to the name found in the volume pool. In addition, the procedure ensures that current backups are not overwritten.
Automatic Volume Management
Prerequisites
When you use automatic volume management, do not use weekdays or days of the month in the volume names, because BRBACKUP or BRARCHIVE does not check whether or not a holiday fell in the period since the last backup. SAP recommends that you include the name of the database instance and a sequential number in the tape name, for example
<DBSID>A<nn> for BRARCHIVE tapes, <DBSID>B<nn> for BRBACKUP tape volumes.Procedure
brbackup -q
brarchive -q
brbackup -q check
brarchive -q check
These commands do not actually start the backup. In particular, you can use these options before scheduling a backup with
CRON or a similar tool.For more information, see
-q|-query.If you want to
select the volumes manually you can deactivate automatic tape management. To do this, set the init<DBSID>.sap parameters volume_backup and volume_archive to SCRATCH or call BRBACKUP or BRARCHIVE with the option -v SCRATCH. For more information, see Scratch Volume.