New
#450
Here I simply went by the guide since I still had Native ide set after a full clean install of 7 back in 2010 when new and another clean install went on last week. Not one issue. After the reg edit 3 settings were changed to AHCI and one other to "Sata type" in the bios. Other then the prompt by auto play once the two storage/backup drives were redetected and installed the only other thing is now seeing the two OS drives listed for a second on a black screen right before the 7 logo appears while booting up.
Originally the factory defaults wouldn't allow the system to boot explaining why it had been left set to Native ide all that time. On your system you installed Windows on the second drive while set in the Raid enabled mode and would now need another clean install. I had to wipe two drives on the last build to split up a Raid array there at one point to wipe each drive separately in order to make each independent.