In the third step of the Vault process the NetBackup catalog is backed up. The NetBackup catalog consists of databases of information about the NetBackup configuration and any backups that have been performed. The information about backups includes records of the files and the media on which the files are stored, including information about media sent off-site. The catalogs also have information about the media and the storage devices that are under the control of Media Manager.
Backing up the catalog is optional. However, vaulting a catalog backup with your data can help you recover from a disaster more efficiently. Vault creates its own catalog backup with up-to-date information; Vault does not duplicate the NetBackup catalog.