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Scheduled NTBackup Fails Sporadically for the Same Reason Each Time

Posted on 2007-04-04
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Last Modified: 2011-10-03
Backup is scheduled to run each night at 11:00PM, and has of late begun to fail when backing up the D: drive. This drive is a mirrored RAID array, the C: drive is a separate physical drive and the backup is being done to one of two external hard drives connected via USB that are swapped each night, so Monday it's drive 1, Tuesday drive 2, etc.

This problem pops up inconsistently, some days backup completes perfectly, other times it fails along the same lines as in the log below. I've tried to determine a pattern, but there seems to be none.

The link at the bottom of the log doesn't help. The drivers for the drive are the latest ones, the only thing the drive is used for is the backup, so I can't see anything that would be causing excess disk usage, there's plenty of space left on the drives (C: ~4GB, D: ~16GB, E: ~130GB), the drive is plugged into the same UPS as the server so power outages are out, it's happening randomly on both of the two different USB drives, there are no virus files in quarantine, My Documents aren't being redirected,  the disks aren't fragmented in any meaningful sense...

I'm stumped, here's the error log:


4/3/2007 11:00 PM
-------------------------------
Date: 4/3/2007
Time: 11:00 PM
User: SYSTEM
-------------------------------

Backup Runner started.
Launching NTBackup: ntbackup.exe backup "@C:\Program Files\Microsoft Windows Small Business Server\Backup\Small Business Backup Script.bks" /d "SBS Backup created on 4/3/2007 at 11:00 PM" /v:yes /r:no /rs:no /hc:off /m normal /j "Small Business Server Backup Job" /l:s /f "E:\Backup Files\Small Business Server Backup (04).bkf" /UM
NTBACKUP LOG FILE: C:\Documents and Settings\SBS Backup User\Local Settings\Application Data\Microsoft\Windows NT\NTBackup\data\backup01.log
=====================<BEGIN NTBACKUP LOG FILE>=====================
Backup Status
Operation: Backup
Active backup destination: File
Media name: "Small Business Server Backup (04).bkf created 4/3/2007 at 11:02 PM"

Volume shadow copy creation: Attempt 1.
Backup (via shadow copy) of "C: "
Backup set #1 on media #1
Backup description: "SBS Backup created on 4/3/2007 at 11:00 PM"
Media name: "Small Business Server Backup (04).bkf created 4/3/2007 at 11:02 PM"

Backup Type: Normal

Backup started on 4/3/2007 at 11:07 PM.
Backup completed on 4/3/2007 at 11:34 PM.
Directories: 3674
Files: 63513
Bytes: 6,557,089,213
Time:  27 minutes and  36 seconds
Backup (via shadow copy) of "D: "
Backup set #2 on media #1
Backup description: "SBS Backup created on 4/3/2007 at 11:00 PM"
Media name: "Small Business Server Backup (04).bkf created 4/3/2007 at 11:02 PM"

Backup Type: Normal

Backup started on 4/3/2007 at 11:34 PM.

Error: The device reported an error on a request to write data to media.
Error reported: Invalid command.
There may be a hardware or media problem.
Please check the system event log for relevant failures.
The operation was ended.
Backup completed on 4/3/2007 at 11:46 PM.
Directories: 294
Files: 14289
Bytes: 5,701,413,085
Time:  11 minutes and  53 seconds

Error: D: is not a valid drive, or you do not have access.

The operation was ended.
Backup completed on 4/3/2007 at 11:46 PM.
Directories: 294
Files: 14289
Bytes: 5,701,413,085
Time:  11 minutes and  56 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 Tuesday, April 03, 2007 11:47 PM
Backup Runner finished.
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Question by:RobbieCrash
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Olaf De Ceuster earned 250 total points
ID: 18850979
Try running a chkdsk/f on D:
Olaf
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by:RobbieCrash
ID: 18875971
I'd wager that's the easiest 250 points you've ever made and the best example of KISS I've seen.
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