>Would going from a single 500G sata to two 500G sata drives in >hardware raid 1 work? Just wandering if some space will be lost using >raid 1? Again like I said: The same or bigger. Often HW raid controllers coerce the size of a drive down a gig or so slightly different drives can all work together. Likely the answer is no... Although dd can work fine, it's far from the only tool do what you want.