CANNOT BACKUP TO NAS USING NTBACKUP IN SERVER 2003

THANKS IN ADVANCE FOR YOUR RECOMENDATIONS ABOUT USING RETROSPECT OR ACRONIS, HOWEVER THEY ARE OUT OF THE BUDGET AND NTBACKUP IS ALL WE HAVE.

WE HAVE 3 SERVERS AND A NAS BACKUP SYSTEM.  TWO OF THE SERVERS ARE FAILING TO RUN THE BACKUP TO THE NAS.  WE ARE RECEIVING THE ERROR MESSAGE "the operation was not performed because the specified media cannot be found".  THE BACKUPS ARE CONFIGURED TO RUN DIRECTLY TO A MAPPED DRIVE (N:) WHICH IS MAPPED DIRECTLY TO THE NAS SERVER.  IF I RUN THE BACKUPS FROM THE CONSOLE THEY WORK, HOWEVER THEY FAIL UNDER SCHEDULED TASKS.  I HAVE RECREATED THE BACKUPS AT LEAST THREE TIMES AND THE RESULT IS THE SAME.  I AM ASSUMING THE MAPPED DRIVE IS NOT FOUND WHILE THE SERVER IS SITTING IDLE FOR EXTENDED PERIODS OF TIME.  I HAVE NOT TRIED BACKING UP DIRECTLY TO UNC PATH YET.  I HAVE READ THAT ADDING THE UNMANAGED SWITCH /UM MAY RESOLVE THE ISSUE, BUT THAT SEEMS TO APPLY TO BACKING UP TO TAPE.

ANY SUGGESTIONS WOULD BE GREATLY APPRECIATED!

HERE IS THE COMMAND LINE FOR THE JOB:

C:\WINDOWS\system32\ntbackup.exe backup "@C:\Documents and Settings\Administrator\Local Settings\Application Data\Microsoft\Windows NT\NTBackup\data\MONTHLY.bks" /n "MONTHLY.bkf created 1/25/2008 at 4:27 PM" /d "Set created 1/25/2008 at 4:27 PM" /v:yes /r:no /rs:no /hc:off /m normal /j "MONTHLY" /l:s /f "N:\SV1\MONTHLY.bkf"
Paleozoic1Asked:
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JSoupCommented:
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Michael WorshamStaff Infrastructure ArchitectCommented:
You also might be running into the 'stale' mapped drive issue on the server.

Mapped Drive Connection to Network Share May Be Lost
http://support.microsoft.com/kb/297684
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JSoupCommented:
does This Answer your question????/
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Paleozoic1Author Commented:
JSoup,

No.  While the situations are similar, the solution in that thread did not help.  That user was trying to backup all data including a NAS drive.  I am trying to back up a server TO a NAS drive.  Authentication, which was the solution in that problem, did not resolve our issue.  NT Backup was scheduled with the same authentication as the mapped drive, yet the backups still fail.

mwecomputers,

I believe also that it is a "stale" mapped drive issue.  Unfortunately, the solution in the MS article describes how to disable the disconnect feature on the Windows computer which is hosting the files.  This NAS unit is not a Windows computer.  It does run a Linux shell.

I appreciate both responses, but neither resolve the issue.
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JSoupCommented:
Let make this a two prong attack
1 understanding why the scheduled tasks failed.
How to troubleshoot scheduled tasks in Windows XP and in Windows Server 2003
http://support.microsoft.com/kb/308558
a.      Checking the Task Status  
b.      Compare the code  
c.      http://msdn2.microsoft.com/en-us/library/ms681381(VS.85).aspx
2 Test the limits of what you can do with the Linux shell share.
Copy a file using scheduled tasks
Create copy1.cmd

Copy C:\Path\ToFiles Z:\PathToFiles /v

If this work try a large file 120Meg min

If it does not work change Z: to >>>> net use l: \\192.168.x.x\share /user: administrator "password"

Administrator and  password   are the Linux shell account


Linux shell..> brand and version needed.
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Paleozoic1Author Commented:
Problem solved.

We simply wrote a net use script to map the drive immediately before the backup runs.  So this was an issue of the mapped drive becoming "stale".  Backing up to UNC worked better than backing up to mapped drive before the net use script, but it was still not 100%.  So far after one week the backups are 100% with the net use script.

Both responses were helpful and I appreciate the time and effort.

Thanks
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Paleozoic1Author Commented:
thanks
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Windows Server 2003

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