Hello,
- Please try the steps mentioned in the following Tech Note:
http://support.veritas.com/docs/241972
( How to recover data from a tape backup if Backup Exec does not recognize the media)
- Check the event logs for any errors related to media
- Check for event IDs 5, 7, 9, 11, 15 in the Event Viewer .
You can also try Ntbackup to see if you can still read the tape..it is worth a try.
Hope it helps you.
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