How can I stabilize this HD? Could it be the kind of cable connecting HD to the ACard. I received two cables with the Maxtor HDs and I received a cable with the ACard. I used one Maxtor and one from ACard due to HD placement and lengths of the cables. Could this be the source of the problem? Thanks,Rob I just installed a Maxtor 120 in my QS 2001(yesterday) everything is working great. From what I read you want to set the jumpers to cable select (on my computer version on up) Also I thought that I read something about not using the Maxtor Cable if your on a Mac. I noticed that the cable on my existing HD had a little hole punched thru on of the wires on the cable , apparently one of the pins on the hard drive isn't intended for us on Macs. Good luck. Loren