Question : Problem: SBS 2003 NT backup failing when writing to Dell Powervault 100T DAT 72

I have had the tape drive replaced 3 times now (Dell Powervault 100T DAT 72), so I am pretty certain the tape drive is not the problem.

Also the media being used is brand new (5 tapes and all do the same thing).

When backing up from Windows Backup Utility, after successfully mounting and rewinding tape, this error occurs:
"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 relevent failures."

Here is the backup log:
Backup Status
Operation: Backup
Active backup destination: 4mm DDS
Media name: "Media created 6/2/2006 at 1:17 PM"

Volume shadow copy creation: Attempt 1.
Backup (via shadow copy) of "C: "
Backup set #1 on media #1
Backup description: "Set created 6/2/2006 at 1:17 PM"
Media name: "Media created 6/2/2006 at 1:17 PM"

Backup Type: Normal

Backup started on 6/2/2006 at 1:19 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 6/2/2006 at 1:48 PM.
Directories: 3
Files: 0
Bytes: 348
Time:  1 second

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


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The operation did not successfully complete.

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Answer : Problem: SBS 2003 NT backup failing when writing to Dell Powervault 100T DAT 72

Use advanced settings in the backup creation to designate an administrator privied user and password.