Hello,
Quick erase writes an indicator at the beginning of the media and the contents of the media are made inaccessible.
When a tape is quick erased, the header information on the tape gets
overwritten. Although, the data may be physically present on the tape but
the Backup Exec will consider it as a fresh tape. By no means the Backup
Exec will be able to retrieve the data from that tape. Performing catalog
operation on the tape will not help either.
Refer the following technote for more information:-
http://support.veritas.com/docs/238752
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