I think that you may be able to get this by using the command
omnirpt -report media_list
List of all media matching the search criteria. The following information is provided for each
medium: ID, label, location, status, protection, used and total MB, the time when media was
last used, the media pool, and media class
omnirpt -report media_list_extended
will add
session specifications that have used this medium
for backup, object copy, or object consolidation, as well as the session type and subtype
There are various filters for this command. I advise that, in your GUI, go to Help -> Guides, and open the Command Line Interpreter Guide (CLI), In section 1, review the 'omnirpt' command