Hello,
We suggest you to disable the Removable storage service as mentioned in the technote below,
http://seer.support.veritas.com/docs/231679.htm
-Reboot the server and re-start the backup exec services.
-split the backup job... and run backups
-Create a new backup to disk folder and then run a backup on it and check the results.
Thanks,
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.