if u had extra raid channels, u'd have enuff channels to put each drive on a separate channel. So on the face of it, without an extra IDE controller, u may be stuck with ripping to HD first, or killing some performance by putting the burner on the hard drive channel. But then again, is ur dvd rom ripping at 4x from the start? no matter the performance combination, if ur rom can't rip faster than 4x at all times, then ur burn times will be affected. On top of that, just in case while in the middle of a burn something goes wrong with the reading, u'd lose that disc ur burning. Sure it's a real treat to burn on the fly, but unitl this particular technology gets a bit more brain dead, I guess we're all better off ripping to the hd first, that's what I do at least.