This still is odd because I have no problem captureing from a dvd player, or any other source other than a beta deckk, using 10bit so I would think my drives are up to spec. Also the macbooks use an express 34 card slot for a firewire 800 card. And no my drives are not full they are 500gb newly formatted Mac OS Extended not journeled. I also benchmarked the drives at a sustained 42 megabytes per second and I am trying to capture at less than 30.