In order to troubleshoot the problem, kindly refer the following technote articles.
Title:- Title:- How to determine the cause of a Tape Alert (Hardware) message that is reported in the Backup Exec job log
http://seer.support.veritas.com/docs/230206.htm
As a related document, kindly refer the following technote:-
Title:- How to determine the cause of a Tape Alert (Hardware) message that is reported in the Backup Exec job log http://seer.support.veritas.com/docs/230206.htm
We hope this helps. Let us know if the problem still exists and revert back with the error message.