Hello,
Run an Inventory and Catalog job on the tape. If the catalogs indicate that the previously backed up data is still not overwritten and is available for restore, you can restore the data. Refer to the following technote for more information:
Title: How and why to perform an Inventory and Catalog
http://support.veritas.com/docs/269948
In case of further queries on this, revert to the forums.
Note : If we do not receive your reply within two business days, this post would be marked ‘assumed answered’ and would be moved to ‘answered questions’ pool.
Regards.