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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. 
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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.

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We are backing up on disk. &nbsp;When what reaches 40 GB? &nbsp;The disk that we are backing up on?
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We are backing up on disk.  When what reaches 40 GB?  The disk that we are backing up on?

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The resulting file's uncompressed (!) size, to be precise.<br />

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


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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. &nbsp;What can be done here?
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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?

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Ok, so we have to follow another branch ... Does your eventlog tell you more about IO failures?<br />

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


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I seem to be running into trouble with some of our servers running NT backup. &nbsp;Every time one of the scheduled full backups run there seems to be a problem. &nbsp;It will run for a few hours and then it won't successfully complete.<br />
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Error: The device reported an error on a request to write data to media.<br />
Error: C: is not a valid drive, or you do not have access.<br />
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I am also getting a code 1f <br />
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The differentials are working just fine and are being backed up at the same location.
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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.

NT Backup errors

The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.

Windows Networking

The term "Backup" means the methods and processes involved to copy computer data (system data as well as application data) to media other than the ones where the data originally live (disk, tape, optical, cloud). "Restore" in turn means the methods and processes involved in data recovery, i. e., bringing back copied computer data to their original location. Backup/Restore primarily serves as a means of protection against data loss, be it due to disaster, corruption or sabotage. It can also be used for recovering data from an earlier point in time and even for cloning machines or applications. There is a wide variety of backup/restore software available, from expensive commercial products to free or open source tools.