SBS2003 NTBackup Fails - requested media failed to mount

Hi,
In the last few days the SBS 2003 server backup program has been failing
with the following:

==============================================================
13/06/2006 23:00
-------------------------------
Date: 13/06/2006
Time: 23:00
User: SYSTEM
-------------------------------

Backup Runner started.
NTMS session started successfully.
EnumerateNtmsObject(NTMS_LIBRARY) succeeded.
Will enumerate on 3 media libraries found.
GetNtmsObjectInformation(NtmsLibraryInfo) succeeded.
GetNtmsObjectInformation(NtmsLibraryInfo) succeeded.
Found an enabled library.
InventoryNtmsLibrary(NtmsInventoryOmid) succeeded.
Identify Media completed
EnumerateNtmsObject(NTMS_MEDIA_TYPE) succeeded.
Will enumerate on 0 media types found.
GetNtmsObjectInformation(NtmsLibraryInfo) succeeded.
Found an enabled library.
InventoryNtmsLibrary(NtmsInventoryOmid) succeeded.
Identify Media completed
EnumerateNtmsObject(NTMS_MEDIA_TYPE) succeeded.
Will enumerate on 1 media types found.
GetNtmsObjectInformation(NtmsPhysicalMediaInfo) succeeded.
GetNtmsObjectInformation(NtmsMediaTypeInfo) succeeded.
Found a tape media type in the library (Travan).
Launching NTBackup: ntbackup.exe backup "@C:\Program Files\Microsoft Windows
Small Business Server\Backup\Small Business Backup Script.bks" /d "SBS
Backup created on 13/06/2006 at 23:00" /v:yes /r:no /rs:no /hc:on /m normal
/j "Small Business Server Backup Job" /l:s /p "Travan" /UM
NTBACKUP LOG FILE: C:\Documents and Settings\SBS Backup User\Local
Settings\Application Data\Microsoft\Windows NT\NTBackup\data\backup02.log
=====================<BEGIN NTBACKUP LOG FILE>=====================
Backup Status
Operation: Backup
Active backup destination: Travan
Media name: "Media created 13/06/2006 at 23:00"

Backup (via shadow copy) of "C: "
Backup set #1 on media #1
Backup description: "SBS Backup created on 13/06/2006 at 23:00"
Media name: "Media created 13/06/2006 at 23:00"

Backup Type: Normal

Backup started on 13/06/2006 at 23:03.
Backup completed on 13/06/2006 at 23:43.
Directories: 2712
Files: 30747
Bytes: 4,205,854,941
Time: 40 minutes and 20 seconds
Backup (via shadow copy) of "D: "
Backup set #2 on media #1
Backup description: "SBS Backup created on 13/06/2006 at 23:00"
Media name: "Media created 13/06/2006 at 23:00"

Backup Type: Normal

Backup started on 13/06/2006 at 23:43.
The requested media failed to mount. The operation was aborted.
The operation was ended.
Backup completed on 14/06/2006 at 02:12.
Directories: 801
Files: 13792
Bytes: 16,297,201,930
Time: 2 hours, 29 minutes, and 28 seconds

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

The operation did not successfully complete.

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

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

For more information about failed backups, see the article on
troubleshooting your backup at the following Web page:
http://go.microsoft.com/fwlink/?LinkId=18414

Backup ended at 14 June 2006 02:13
Backup Runner finished.
==============================================================
I checked the original Dell documentation and the tape drive is listed as:
TAPE, MAGNETIC, 20/40GB, Travan 40, V2
so it is capable of backing up to 40GB presumably using compression, but
looking at the error log it appears that once the C: and D: drive backup
hits 20GB (4GB on C and 16GB on D) it aborts, presumably looking for a
second tape to be inserted?

Is there a way to get round this and force the backup to use the Travan tape
in compressed mode and thus have 40GB available? Or is there something else
going on.
I notice that the Exchange logs folder is getting huge 1500 plus files at
5MB each, can these be deleted manually or does it have to be done as part
of the backup process?

--
Siv
Martley, Near Worcester, United Kingdom.


.

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