volume_backup 

This parameter is used by BRBACKUP to identify the volume/directory to be used for the backup of the database or non-database files.

Default value: None
The length of the volume name is limited to 10 characters.

Required values: Names of volumes that are to be used for database or other backups. If you specify more than one volume, you must separate the names with commas and enclose the list in parentheses. You can also enter SCRATCH to deactivate automatic volume management.

Volume list :

When BRBACKUP is started, the automatic volume management will check all the volumes in the sequence of their names in volume_backup (only volumes whose expiration period has expired will be suggested for backup). The volumes will be suggested cyclically.

You have two backup devices available, and three valid volumes were found in parameter volume_backup (the expiration period for these volumes has expired). The program assumes that you have mounted two of the selected volumes in the devices. If a third volume is required to complete the backup, the program will prompt you to mount the third selected volume at the appropriate time.

See Automatic Volume Management.

The expiration period can be configured using parameter expir_period . The automatic volume management ensures that only free volumes are offered for backup, e.g. those whose expiration period has expired. As a result, you will have to supply a quantity of volumes that is large enough for your selected expiration period.

You perform a backup once a day, two volumes (tapes) are required; parameter expir_period is set to 14 (each volume is locked for 14 days at a time). In this case, you must specify at least 28 volumes to ensure that a volume is always available. Even better is to add a buffer of around 25% - e.g. specifying 35 or more volumes in this case.

SCRATCH

To deactivate the automatic volume management, use the command volume_backup = SCRATCH . In this case, you can mount any volume whose expiration period has expired. This name will then also be recorded during the backup.