Hello Mike,
Would you also tell us if all servers are being backed up in a single job ? If so let us isolate the issue by creating atleast 10 different jobs comprising 3 servers each.
Is this just a windows environment or do you also Linux and Netware servers that are being backed up ?
Is this is a cluster or SAN environment ? How many Exchange, SQL or other database servers ?
In Backup Exec click on Tools > Option > Job Log Select the 3rd or the 4th option so we get a detailed job log.
You should also start the SGMON, before backups and try to debug what is going wrong or on what type of files is the backup failing exactly.
Please refer to this technote to know how to use SGMOn.
How to use the SGMON utility to perform a live debug of Backup Exec
http://support.veritas.com/docs/190979
Check in the System Event Log for any Hardware issues. Check for event IDs 5, 7, 9, 11, 15, with the source being the SCSI card or perhaps the device drivers.
Thankyou for an update.
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.
Additional Information :
For information on the recent VERITAS Backup Exec security vulnerabilities, including links to the downloads for the necessary hotfixes, please refer to the following document:
Patch summary for Security Advisories VX05-001, VX05-002, VX05-003, VX05-005, VX05-006, VX05-007
http://seer.support.veritas.com/docs/277429.htm