I was at a complete loss as to what the problem could have been i flashed the bios, reinstalled windows twice, changed powercables, sata cables, tried jumpers and even replaced CMOS battery nothing worked untill i found this link in google about the SB850 refusing some HDD’s. Took me 2 CD’s to burn. But what is 2 euro for 2 CD’s against 100 Euro for a new drive right.