Chris,
I assume you've taken a look at
this document. Any drive that supports 1394 and SBP-2 should work, note that it must be formatted FAT32 and you may need a utility to format a 1394 drive in Windows for a partition larger than 30GB, or if you can remove the IDE drive from the 1394 enclosure you can probably use Windows.
Doug M
Applications Engineer
National Instruments
For those unfamiliar with NBC's The Office, my icon is NOT a picture of me 🙂