backup_dbverify - Checks the integrity of the Backup Database


backup dbverify [-detail] [-localauth] [-cell <cell name>] [-help]

backup db [-d] [-l] [-c <cell name>] [-h]


The backup dbverify command checks the integrity of the Backup Database. The command's output indicates whether the Backup Database is damaged (data is corrupted) or not. If the Backup Database is undamaged, it is safe to continue using it. If it is corrupted, discontinue any backup operations until it is repaired.


While this command runs, no other backup operation can access the Backup Database; the other commands do not run until this command completes. Avoid issuing this command when other backup operations are likely to run. The backup savedb command repairs some types of corruption.



Reports the number of orphaned blocks found, any inconsistencies, and the name of the server machine running the Backup Server that is checking its copy of the database.


Constructs a server ticket using a key from the local /usr/afs/etc/KeyFile file. The backup command interpreter presents it to the Backup Server, Volume Server and VL Server during mutual authentication. Do not combine this flag with the -cell argument. For more details, see backup(8).

-cell <cell name>

Names the cell in which to run the command. Do not combine this argument with the -localauth flag. For more details, see backup(8).


Prints the online help for this command. All other valid options are ignored.


The command displays one of the following two messages:

Database OK

The database is undamaged and can be used.

Database not OK

The database is damaged. You can use the backup savedb command to repair many kinds of corruption as it creates a backup copy. For more detailed instructions, see the OpenAFS Administration Guide chapter about performing backup operations.

The -detail flag provides additional information:


The following command confirms that the Backup Database is undamaged:

   % backup dbverify
   Database OK

The following command confirms that the Backup Database is undamaged and that it has no orphan blocks or invalid Tape Coordinator entries. The Backup Server running on the machine checked its copy of the Database.

   % backup dbverify -detail
   Database OK
   Orphan blocks 0
   Database checker was


The issuer must be listed in the /usr/afs/etc/UserList file on every machine where the Backup Server is running, or must be logged onto a server machine as the local superuser root if the -localauth flag is included.


BackupLog(5), backup(8), backup_restoredb(8), backup_savedb(8), bos_getlog(8)


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