You could first try updating the status to scratch. It could be that the volume had a mount or write failure. That could be due to media error or tape drive error. If the tape is unlabeled or damaged it will fail again when you try to checkout or checkin.
update libvol <library_name> <volser> status=scratch After that, as a test try checking the tape out (or in) with "checklabel=yes" to force it to read the internal label. George Huebschman (George H.) The contents of this email are the property of PNC. If it was not addressed to you, you have no legal right to read it. If you think you received it in error, please notify the sender. Do not forward or copy without permission of the sender. This message may be considered a commercial electronic message under Canadian law or this message may contain an advertisement of a product or service and thus may constitute a commercial electronic mail message under US law. You may unsubscribe at any time from receiving commercial electronic messages from PNC at http://pages.e.pnc.com/globalunsub/ PNC, 249 Fifth Avenue, Pittsburgh, PA 15222; pnc.com
