you can do that today, use a 3.5" hdd (laptop hd) and ide2usb converter (aka enclosure)
don't buy metal casing tho, i got my 3.5" hdd short-circuited and now is dead -- now i never use enclosure casing
don't buy metal casing tho, i got my 3.5" hdd short-circuited and now is dead -- now i never use enclosure casing
To answer the original question: if they bring out a drive + bridge logic that consumes less than 900mA on spin-up (or a bridge board with a sufficiently big capacitor to cross the spin-up period) then yes.