Give what Simon said a try, a ./bpmedialist should show you the media 
server it was used to mount the tape.

It sucks you can't use -deassignbyid in 6.0.

On Mon, 13 Nov 2006, Sponsler, Michael wrote:

> Netbackup 6 MP2, solaris 8 media server, solaris 10 master server.
> Quantum Superloader, SDLT600.  Each media server has a Superloader
> connected locally via SCSI.
> 
> I'm trying to deassign tapes so I can erase/label them for re-use.  When
> trying to run the bpexpdate command (on the media server), it will ask
> me if I'm sure I want to delete the tape, I answer 'y' for yes, and it
> will sit there for hours.  I'll have to do a control-C to kill the
> command, and the tape will still be assigned.  I get no error, haven't
> seen anything in /var/adm/messages on the media or master server.  I
> haven't seen anything distinguishable in the netbackup logs.  Has anyone
> had any problems like this before?  Anyone have any suggestions?
> 
> --
> Mike Sponsler
> Northrop Grumman
> Michael.Sponsler at ngc.com
> (703) 968-1302
> 12900 Federal Systems Pkwy
> Fairfax, VA 22033
> 
> 
>