Backup failing out of no where. PLEASE HELP

Hello I have a certrance travan drive. I installed SBS 2003 SP1 6 weeks ago
and have not had a problem with backup up until two days ago.

I am receiving the following errors:

Backup Type: Copy

Backup started on 11/17/2005 at 4:13 PM.
The requested media failed to mount. The operation was aborted.
The operation was ended.
Backup completed on 11/17/2005 at 4:19 PM.
Directories: 184
Files: 2673
Bytes: 542,352,332
Time: 5 minutes and 31 seconds

----------------------

The operation did not successfully complete.

----------------------

=======================<END NTBACKUP LOG FILE>=====================
NTBackup finished the backup with errors.



In the application event view I receive these messages:

Event Type: Error
Event Source: NTBackup
Event Category: None
Event ID: 8019
Date: 11/17/2005
Time: 4:19:09 PM
User: N/A
Computer: name
Description:
End Operation: Warnings or errors were encountered.
Consult the backup report for more details.



as well

Event Type: Information
Event Source: UPHClean
Event Category: None
Event ID: 1401
Date: 11/17/2005
Time: 4:19:10 PM
User: XTIVITY\SBS Backup User
Computer: XTIVITY-DC1
Description:
The following handles in user profile hive XTIVITY\SBS Backup User
(S-1-5-21-3496122069-130786104-3642064666-1128) have been remapped because
they were preventing the profile from unloading successfully:

rsmsink.exe (7296)
HKCU\Software\Classes (0x80)
HKCU\Software\Classes (0xa4)
HKCU\Software\Classes (0xc0)
HKCU\Software\Classes (0xcc)
HKCU\Software\Classes (0x100)


For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.


.

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