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Troubleshooting
Troubleshooting Backup and Restore Sessions
Chapter 12 581
No previous full backup
Before performing an incremental backup of an object, Data Protector
requires a full backup. Data Protector uses a full backup as a base for
comparison to determine which files have changed and consequently
need to be included in the incremental backup. If a protected full backup
is not available for this comparison, a full backup is performed.
Action Set the protection for the full backup.
The description has changed
An object is defined by the client, disk, and description. If any one of
these three change, Data Protector considers it as a new object, even if
the client and disk are the same, and Data Protector performs a full
backup instead of an incremental.
Action Use the same description for full and incremental backups.
The backup owner is different
If your backups are configured to run as private, the person starting the
backup is the owner of the data. For example, if USER_1 performs a full
backup and USER_2 tries to start an incremental backup, the
incremental backup will be executed as a full backup. This is because the
data for USER_1 is private and cannot be used as a base for the
USER_2's incremental backup.
Action Configure backup session Ownership in the Advanced Backup Options
for the backup specification. The backup owner should be a user from the
Admin user group. This will make all backups owned by this user,
regardless of who actually starts the backup session.
Unexpected Mount Request for a Standalone Device
There are several situations, described below, that may cause Data
Protector to issue a mount request for a standalone device while media
are available in the backup device.
The media in the device are in a media pool that has the Non
Appendable policy
Even though there is still available space on the media, the media will
not be used because of the Non Appendable policy of the pool.