Instructions for configuring the OS settings for DLT 7000s can be found on the Quantum web site at http://www.quantum.com/app_notes/app_notes.htm. For Qualstar tape drives (including AIT drives), the URL is http://www.qualstar.com/146035.htm.
I could find no useful information on the Sony web site about AIT drives, and the Exabyte web site limits its information to hardware troubleshooting. Another URL for searching for information on storage devices -- including tape drives and optical disks -- is http://directory.google.com/Top/Computers/Hardware/Storage/.
(As elsewhere, better URLs
for troubleshooting storage devices are welcome.)