I got this 120GB Seagate hd that works well on the PC but fails miserably on the A4000T. Jumper is set correctly(master, slave off). An old 120MB hd I have lying around works like a charm on the A4000T, so it's not a problem with the controler.
I remember some threads about something similar a while ago, but can't find them anymore, is this a known problem with some hd's or it should work ?