Basically I want to be able to register two usb drives and have them mirrored in the same machine. I don't know if it's possible to do this or not, but I think it would be a nice to have.
Considering I've had 3 usb drives fail me over the years I just want something that doesn't have me nervous it'll stop responding randomly someday. So even something like support for Sata-DOMs would be really welcome. Although I think just having some sort of automatic mirroring would be good enough.