SBS backup failing on 2 diffrent servers

[killcity]

I am administrating 2 separate SBS 2003 servers at different companies. 1 back up started to fail intermittently. Then the other one started to do it as well, now they fail everyday. This is the log file I am receiving from 1 of them, cant logon to other at moment for some reason lol.
The server this log file is from has SP2 installed and 2 x 36 gig drives with an HP72gig DAT tape system. The backup is complete as that is all you can do on a SBS and the tapes are changed daily.

7/19/2007 12:30 AM
-------------------------------
Date: 7/19/2007
Time: 12:30 AM
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_PHYSICAL_MEDIA) succeeded.
Will enumerate on 1 media types found.
GetNtmsObjectInformation(NtmsPhysicalMediaInfo) succeeded.
GetNtmsObjectInformation(NtmsMediaTypeInfo) succeeded.
GetNtmsObjectInformation(NtmsLibraryInfo) succeeded.
Found an enabled library.
InventoryNtmsLibrary(NtmsInventoryOmid) succeeded.
Identify Media completed
EnumerateNtmsObject(NTMS_PHYSICAL_MEDIA) succeeded.
Will enumerate on 1 media types found.
GetNtmsObjectInformation(NtmsPhysicalMediaInfo) succeeded.
GetNtmsObjectInformation(NtmsMediaTypeInfo) succeeded.
Found a tape media type in the library (4mm DDS).
Launching NTBackup: ntbackup.exe backup "@C:\Program Files\Microsoft Windows Small Business Server\Backup\Small Business Backup Script.bks" /d "SBS Backup created on 7/19/2007 at 12:30 AM" /v:yes /r:no /rs:no /hcn /m normal /j "Small Business Server Backup Job" /l:s /p "4mm DDS" /UM
NTBACKUP LOG FILE: C:\Documents and Settings\SBS Backup User\Local Settings\Application Data\Microsoft\Windows NT\NTBackup\data\backup03.log
=====================<BEGIN NTBACKUP LOG FILE>=====================
Backup Status
Operation: Backup
Active backup destination: 4mm DDS
Media name: "Media created 7/19/2007 at 12:30 AM"

Volume shadow copy creation: Attempt 1.
Backup (via shadow copy) of "C: "
Backup set #1 on media #1
Backup description: "SBS Backup created on 7/19/2007 at 12:30 AM"
Media name: "Media created 7/19/2007 at 12:30 AM"

Backup Type: Normal

Backup started on 7/19/2007 at 12:34 AM.
Backup completed on 7/19/2007 at 3:08 AM.
Directories: 5691
Files: 68093
Bytes: 31,044,031,444
Time: 2 hours, 34 minutes, and 17 seconds
Backup (via shadow copy) of "D: New Volume"
Backup set #2 on media #1
Backup description: "SBS Backup created on 7/19/2007 at 12:30 AM"
Media name: "Media created 7/19/2007 at 12:30 AM"

Backup Type: Normal

Backup started on 7/19/2007 at 3:08 AM.
The requested media failed to mount. The operation was aborted.
The operation was ended.
Backup completed on 7/19/2007 at 4:08 AM.
Directories: 835
Files: 16367
Bytes: 10,882,864,055
Time: 59 minutes and 9 seconds

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

The operation did not successfully complete.

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

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

I have tried several things and have even excluded each folder from the backup on both systems each day to see if I could find a file that was causing the problem but no luck. Now I am scratching my head as I have no idea and starting to panic cos if there was a fail and I needed the backup it might be missing something important. Any ideas or help would be appreciated.
Thanks
Steve

 

[58sniper]

I'll bet the total space being backed up exceeds the capacity of the tape. Is that drive 72GB compressed?

Pat Richard, MCSE MCSA:Messaging CNA
Microsoft Exchange MVP

 

[killcity]

Hi Thanks, but already checked that only 55gig being backed up from c: and d: tape is 72 compressed but should be plenty of space.
Steve

 

[HalComps]

The best way to find out WHY your backup failed, is to actually read the NTBackup log file from the Backup snap-in. Then you can go from there to try fix any errors.

 

[ShackDaddy]

You know, all sorts of factors have to be in place for compression to actually work to the full 72gb. You will often find that "compression" doesn't double the 36 to be 72. It may only get you to 41, as your backup log indicated. The error you are getting is the exact error I get when my tapes have run out of room.

This sort of scenario is exactly why I am moving away from tape and going to disk. Right now I'm deploying Dell RD1000's for my clients. They are treated like disks by the on-site people, since they are swappable disk cartridges, but they are USB or SATA-based, so you don't deal with tape's foibles.

ShackDaddy
Shackelford Consulting

 

[killcity]

Hi Thanks for that, i thought ui had more like 60-65Gig on the tapes to play with hmmm thats a bit of a problem. will have to look at some sort of diffrent way to backup as well.
thank