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NetBackup System Administrator’s Guide - Windows NT Server
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Media Catalog
NetBackup keeps a media catalog with information that correlates backups to
the volumes where they are stored. Each server maintains a media catalog for
the storage units attaching to that server.
The media catalog is created in the install_path
\NetBackup\db\media
directory during installation. NetBackup refers to the media catalog when it
needs a volume for a backup or restore. If the media catalog does not contain a
suitable volume, NetBackup has Media Manager assign one. In this manner the
catalog is populated as NetBackup uses new volumes for backups.
When the retention period has ended for all backups on a volume, NetBackup
deletes it from the media catalog. Media Manager then deassigns the volume
so it is available for reassignment at a future date.
Note:
Volumes for backups of the NetBackup catalogs are a special case and
do not appear in the media catalog. You must track the media IDs for these
volumes separately so you can find them in case the media catalog is damaged.
They do appear, however, in the Media Manager volume catalog.
Media States
The following media states apply to volumes that are in the NetBackup media
catalog but are not active. That is, the volumes cannot be used for both
backups and restores.
Table 24 Media States
State Description
FULL
NetBackup sets FULL status if it encounters an end of media
(EOM) during a backup.
A full volume is unavailable for future backups until the
retention period expires for all backups that are on it. At that
time, the volume is deleted from the NetBackup media catalog
and deassigned from NetBackup.
NetBackup 3.2 System Administrator's Guide for Windows NT
NetBackup 3.2 System Administrator's Guide for Windows NT