FMV5164E
Backup or archive of drives with duplicate volume labels is not allowed.
Explanation
You tried to back up or archive a drive that has a duplicate volume label. Because Tivoli Storage Manager uses the volume label to keep track of backup or archive information, it cannot back up or archive files from a drive with a duplicate volume label.
System action
Tivoli Storage Manager cannot select the drive for backup or archive operations.
User response
If the volume needs to be available to the system, exit Tivoli Storage Manager and assign a unique volume label to the drive. Restart Tivoli Storage Manager and try the operation again.