volume_archive 

This parameter is used by BRARCHIVE to identify the volume/directory to be used for the archive of the offline redo log files.

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

Required values: Names of volumes (tapes) that are to be used for an archiving run. 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 BRARCHIVE is started, the automatic volume management will check all the volumes in the sequence of their names in volume_archive (only volumes whose expiration period has expired will be suggested for archiving). The volumes will be suggested cyclically.

A valid volume name was found based on parameter volume_archive (that is, the expiration period for this volume has expired). The program assumes that you have mounted this volume. Once several check mechanisms have run, archiving is started on that volume.

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 archives once a day, one volume (tape) is 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 14 volumes to ensure that a volume is always available. Even better is to add a buffer of around 25% - e.g. specifying 18 or more volume names 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 archive.