Which driver version have you used? I've had the same problem. On the Adaptec download page for this controllere, there are 4 diff. drivers: http://www.adaptec.com/en-US/downloads/ms/...ATA+RAID+1210SA The first one is unsuitable for fresh installs they say, the second one does not have such a warning. Now, I tried that one (integrated it) but no luck. When I load the 3rd one from a floppy via F6, it works.