Hi. I just bought and installed a SSD (Samsung). It loads Windows and it works fine. I am concerned that I don't exactly know what I'm doing. I heard that SSD is supposed to use AHCI to enjoy the full capacity of the speed it provides. So the SSD uses AHCI and HDD uses IDE; the BIOS won't recognise either drive. I am currently allocating the HDD as a backup source (7200 RPMs). Please tell me why the BIOS won't recognise either hard drive.