You should check in bios :-
Manual Section 3.5
Integrated peripherals:-
Sata Mode need changing from ide to raid
also check the settings3-17~3-18
IDE Bus Master
This option enables or disables the IDE bus mastering capability under the DOS environment.
SATA Mode
This item determines the mode for on-chip Serial ATA.
[IDE]: The on-chip Serial ATA served as IDE mode.
[RAID]: The on-chip Serial ATA served as RAID mode.
[AHCI]: The on-chip Serial ATA served as AHCI (Advanced Host Controller Interface) mode for advanced performance and usability.
Onboard pci devices
for the sil controller if using that section 3-19
if u haver the drives plugged in there