I take it you have that device and are curious if it works with Veritas. Check their website, see if they have a supported drives document. Should work fine if its on that list. Backup Exec is the product I have been using on my Windows Servers for years now, and whether its a standard cartridge drive, autoloader, AIT, or DLT, its always worked well. Veritas has a presales department that may help you find the answer if you can't find it at their website. Good luck!
Matt J.
Please always take the time to backup any and all data before performing any actions suggested for ANY problem, regardless of how minor a change it might seem. Also test the backup to make sure it is intact.