from an old post
http://forums.symantec.com/discussions/thread.jspa?threadID=66863&messageID=4454322
vmglob -listall -b
and see if you see the old machine
vmglob -delete
tpautoconf -sync
vmoprcmd -h SERVERNAME -autoconfig -sync
vmglob -listall -b
http://support.veritas.com/docs/258951
If possible, re-connect and boot up the media server and execute the procedures accordingly.
If the media server is gone forever, you can try removing the 'logical' media server and its device from NB (i.e. steps 4 onwards of the document http://support.veritas.com/docs/266720). As your media server is no more available, certain steps may took sometime as it is waiting for timeout while trying to establish connection with the removed media server.
Delete and re-configure the questioned tape drive back to your current media server.
http://support.veritas.com/docs/259899
The tape drive serial number or the firmware version is not correct in the global database.