Running BE 12.5 on Win Server 2003 SP2 and backing up to an HP D2D appliance with 8 slots on the network. Ran perfectly for a couple of months. Then last week had a long power outage and since then, all BE jobs fail (initialize, inventory, backup, etc.) Get the following errors:
<job name> - The job failed with the following error: Physical Volume Library Drive or Robot paused, offline, or disabled.
<job name> - The job failed with the following error: Physical Volume Library Robot not found.
I can see the appliance listed in Devices, I can put it online, I have verified iSCSI is still configured and connected. I have tried restarting the server, stopping and starting BE services. Nothing has worked.
I had a very similar issue. I had done all the steps you had and thankfully remembered I had load 16 tapes into my Sony AIT-5 autoloader and it was only showing 15. There was a bad tape stuck in the picker that was causing the whole drive system to repeatedly go offline. Is it possible that the power outage caused some corruption of one of the tapes? Have you tried pulling all the tapes from the slots and drive then rebooting?