We are running BE 2010 with a LTO-2 Dell PowerFault 110T. We have a daily backup running using hardware compression. On Wednesdays, the backup fails because the tape runs out of room. It appears the tape is only running with a 1.1:1 compression ratio. All of the other daily tapes run with around a 1.6:1 ratio. I've replaced the tape twice with new tapes and had the same result.
The server is running 2008 R2, is our DC and AD controller, it is the only active server on the domain. I've changed all scheduled tasks to the weekend, as far as I can tell from Event Viewer the server isn't running any other tasks that would cause the compression to slow.
We have McAfee SonicWall Enforced Client AV that's running Wednesday nights that could potentially cause this error, however this is a recent occurance. What could be causing the compression to fail on one day only?
Thanks,
Steve