exabyte drive
Offhand, I'd say the 8200 is the most popular. But your best plan of
attack is to call the service bureaus that you're going to use, and
ask them what they have. You might want to buy a newer model for
other reasons, of course. However, it's sometimes difficult to find
software to reset the modes of fancier drives to emulate the 8200, so
there are compatibility issues, too.