When I boot into the ASUS UEFI bios utility, the SATA mode selection is set to RAID (Note; choices include Disabled, IDE, AHCI and RAID). I have two Seagate NAS hard drives which is currently on a raid-1 configuration. These drives contain all of my data. I have another drive, a SSD, on which I have the OS loaded and on which I intend to load all software apps. The SSD is not raid configured.