This drive is only about 3 months old and when tested on another machine it works. We had performance issuess with windows so we restarted the server, when it came back on everything looked good but that nights backup go 7 gigs in and then failed with a I/O error. I ran the drive utlities test and it passed the reading but failed on the writing. I did a couple of file restores to make sure the read really was working, and it did restore files correctly. We tried a new drive of the same model and it still had the problems. We shutdown the server, turned off the tape drive, turned on the tape drive and then started up the server and when everything was loaded still same issue.
What do you think went wrong?
Do you think a windows update did something to the SCSI controller card driver?
Could a new controller card just for the tape drive possible fix this?