I am not having much luck finding a solution to this. I have Netbackup 7.5 running with an HP MSL6000 tape library. According to netbackup, the library has a tape in slot 20 that is not actually there. When I change the tapes out and inventory, it still shows up. I have rebooted the server and the library itself. No change.
I believe the problem is with netbackup, since the graphical indicator on the library does not show the tape. I even tried putting a real tape in the supposed phantom tape spot and netbackup showed the real tape in the next slot!
Finding the actual tape that corresponds to the phantom tape is not an option at the moment. So I am hoping there is a way to manually fix this without compromising my ability to recover data from that actual tape if I actually need it. Everything in the Natbackup documentation talks about phantom drives, not phantom tapes.