We have a Dell Optiplex 960 running XP SP3. In the A07 BIOS the SATA drive setting is set to RAID On. When I change it to the other three available settings (ATA, AHCI or Legacy) a warning is given advising the system may not boot. Sure enough changing to any of the three settings results in an unbootable system.
How can I configure XP to allow me to change the setting without a re-install. I have done something similar on a Dell Latitude E6400 laptop to change from IRRT mode but cannot figure out how to do this on the desktop.