I checked the backup this morning and it cam up with the following error:
Job ended: 29 March 2008 at 04:18:29 Completed status: Failed Final error: 0xe00084f0 - The device timed out. Final error category: Backup Device Errors
For additional information regarding this error refer to link V-79-57344-34032
Check the system event log for any errors on the tape drive or SCSI controller. The timeout errors are occasionalyy drive ror firmware related, but are usually indicative of a hardware problem.