Steve,
Run the Media Contents Report
The Media Contents report shows the contents of a volume as read directly from the media header and backup headers. This report lists the backup IDs (not each individual file) that are on a single volume. It physically mounts the tape and reads all of the information directly from the tape. Then you will be able to know what is actually on it and perhaps determine if it is of value. Environments change, media servers sometimes are not decommissioned correctly, etc...
You can do it from the GUI or from the command line. Here's the syntax:
# cd /usr/openv/netbackup/bin/admincmd
# ./bpmedialist -U -mcontents Message was edited by:
Bob Stump