NTBackup - The device reported an error on a request to write data to media.

Hi,

I'm having some problems with NTBackup. We currently have 5 servers which we have two NTBackup jobs set-up on each server. One backup job for each server is for backing up system state. The next backup job which runs after that backs up the files and then the system state backup.

The problem that I am getting is that on some days the backups on different servers fail, its currently random as to which backup will fail and on what day. When they fail the error log always contains the following:

Error: The device reported an error on a request to write data to media.
Error reported: Unknown error.

Then if it was an exchange backup

Error: SERVER\Microsoft Information Store\First Storage Group is not a valid drive, or you do not have access.

If it was a file backup (the drive letter will change depending on where the files are being backed up.

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

If I go and run that schedule task again it will succeed. Because the backups can run perfectly I think that the error which is being reported is not correct because obviously the drives are accessible. What I'm thinking it could be (I'm guessing here) is that maybe this is the error that you get when doing a backup across the network and maybe the network connection drops out for a second.

I really need to get this sorted and working, does anyone have any ideas on what I should do here?

Cheers

Damon


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