Ok, you need Raid disable and thats it, and the sata change raid for AHCI, in the bios, mmm when you go to the bios is the 3er option, im not at home, I cant help you, but I know to set up the AHCI is the 3er option(you start left, up to down), the next menu is the last or one before, and thats it,
Take care. I hope I can help you.
JAviER