MSI P35 Platinum Combo series Instruction Manual page 106

(2) Delete RAID Volume
Here you can delete the RAID volume, but please be noted that all data on RAID
drives will be lost.
Important
If your system currently boots to RAID and you delete the RAID volume in the
Intel RAID Option ROM, your system will become unbootable.
Select option 2 Delete RAID Volume from the main menu window and press
<Enter> key to select a RAID volume for deletion. Then press <Delete> key to
delete the selected RAID volume. The following screen appears.
Press <Y> key to accept the volume deletion.
Intel ICH9R SATA RAID
C-7