Using the debug commands and some research, I've learned the 701n (Dell's NAS) uses BSD, not Linux.
I have not tried putting up a BSD box and mounting the drives, yet... has anyone else?
My main concern is the ability to retrieve data WITHOUT having to send the things back to Quantum or Dell. . . particularly, when we've all voided the warranty by "upgrading" the drives.
To enter debug mode:
http://nas/config/debug
then type "?" (without quotes) for a list of commands.