Why did you do that? I mean there is no need to change disk selection/settings to boot Memtest86+?
Well the only thing you can do now is format and redo the Whole RAID array and OS. Or buy RAID recovery software if it is that important to you. You can try this freeware but you will need a third drive, and 24hrs to spare >>>
RAID Reconstructor - Recover Data from a Broken RAID Array
When recovering RAID Data it takes Forever and NONE of your files will be named properly. You will spend literally a day or two AFTER recovery sorting thru it all
Please remember this, DO NOT EVER change RAID To IDE when you have a RAID array in use. Also if and when you flash your BIOS and load optimized defaults and reboot, before starting windows go back in and set RAID settings again or the same will happen