NT Backup errors

Posted on 2008-10-28
Last Modified: 2013-12-23
I seem to be running into trouble with some of our servers running NT backup.  Every time one of the scheduled full backups run there seems to be a problem.  It will run for a few hours and then it won't successfully complete.

Error: The device reported an error on a request to write data to media.
Error: C: is not a valid drive, or you do not have access.

I am also getting a code 1f

The differentials are working just fine and are being backed up at the same location.
Question by:bkort1
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Expert Comment

ID: 22824249
What brand/type of server are you running? I'm seen Dell PowerEdge servers pop up with this type of tape drive error, but only in Windows Server 2003.
LVL 70

Accepted Solution

Qlemo earned 500 total points
ID: 22824486
Are you backup on tape or disk? There are bugs using disk targets in combination with (file system) compression, when reaching 40 GB.

Author Comment

ID: 22824820
We are backing up on disk.  When what reaches 40 GB?  The disk that we are backing up on?
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LVL 70

Expert Comment

ID: 22824890
The resulting file
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Expert Comment

ID: 22824903
The resulting file's uncompressed (!) size, to be precise.

Author Comment

ID: 22843593
Actually I am running a full backup right now, on one of the ones that failed last time, and it looks to be about 31 GB when it is done.  What can be done here?
LVL 70

Expert Comment

ID: 22843767
Ok, so we have to follow another branch ... Does your eventlog tell you more about IO failures?

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