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NetBackup System Administrator’s Guide - Windows NT Server
B
1. Searches the NetBackup media catalog for a volume that is already
mounted in a drive and meets the following criteria:
• Configured to contain backups at the retention level required by the
schedule (unless
ALLOW_MULTIPLE_RETENTIONS_PER_MEDIA
is
present in the registry).
• In the volume pool required by the backup being performed.
• Not in a FULL, FROZEN, IMPORTED, or SUSPENDED state.
• Of the same density required by the requested backup and, in the case of
a robotic storage unit, in the robot requested by the backup.
• Not currently in use by another backup or a restore.
• Not written in a protected format (see “Allow Media Overwrite” on
page 482). This is detected after the volume is mounted. If the volume is
in a protected format, it is unmounted and NetBackup resumes the
search.
2. If NetBackup cannot find a mounted volume that satisfies the above
conditions, it checks its media catalog for any volume that is suitable.
3. If the media catalog does not have a suitable volume, NetBackup searches
the volume catalog for one that meets all of the following criteria:
• Is the correct media type
• Is for the correct robot type (if applicable)
• Is located in the requested robotic peripheral (if applicable)
• Resides on the requested host
• Is in the correct volume pool
• Is not currently assigned (not already allocated to NetBackup)
• Is not expired (if an expiration date is defined in Media Manager)
• Has not exceeded the maximum number of mounts allowed
4. If more than one volume qualifies, NetBackup chooses the one with the
least mounts. NetBackup then adds it to the media catalog and assigns it
the specified retention level.
5. If there are no unassigned volumes of the requested type, the backup is
terminated with an error indicating no available media.
NetBackup 3.2 System Administrator's Guide for Windows NT
NetBackup 3.2 System Administrator's Guide for Windows NT