Try these steps to reset the volume to non-RAID.
1.Boot your system and use CTRL-I to enter the RST BIOS Extension.
Note: This key combination may have been disabled by your computer manufacturer. If you are unable to enter the RAID BIOS extension, please contact your system manufacturer for more information.
2.Reset the volume to non-RAID.
3.Reboot your system.
**Before performing these steps, please back up your data.
Intel Customer Support Technician
Under Contract to Intel Corporation