Tape Drives Offline!
I have an attached tape library which has been working well for a few months since we installed it.
It has 4 tape drives inside.
Today 1 drive went offline. Then another. And this afternoon a 3rd one went offline.
When I bring a drive online via the All Storage GUI, it falls back offline in a few minutes.
If I run a cleaning job to clean the tape (just in case that was the issue) it goes offline while trying to clean.