OS is 2k8R2. I reinistalled BUE from fresh there, it got through one tape and then as soon as i tried to inventory and cat the 2nd tape it immediately offlined the drive.
I removed the drive + uninstalled drivers through Device Manager, rebooted the server, installed the symantec tape drivers through the tape install wizard on 2012. Rebooted again to make sure evrything was ok.
Currently catting the other tape in the set, this tape contains a full 1.6TB of information so it's expected to take a short while. Last run, this got to approx 1.3TB before the drive offlined itself and stopped.