The migration to the new Crucial P3 SSD this weekend was successful following the steps outlined by Ron for switching the BIOS from RAID to AHCI. FYI - I used the free EaseUS Todo backup for this and it worked fine. I was expecting the Raid0 to become inaccessible when I switched the BIOS from RAID to AHCI. To my surprise, the Raid0 remains accessible after the switch. The switch to AHCI has only affected the Intel Rapid Storage Technology application for managing and monitoring the Raid. The RST app ceased to function and I've disabled it. I guess it depends on information provided by the Raid driver that's no longer being used. But the Raid0 itself is still working fine. My Raid0 uses two WD Black drives and I can monitor those manually using Western Digital's Dashboard app. Thanks, Ron, for the help with this.
I had a Samsung 850 EVO - 1TB - M.2 SATA III Internal SSD installed along with two hard drives in a Raid0. Everything was fine. SSD was the boot device. I'm trying to replace the Samsung SSD with a Crucial P3 SSD. Restore to the P3 went fine using EaseUS Todo Backup and I was originally able to boot to the new drive in safe mode. I noticed the drive does not appear in the Intel Raid screen during boot. The Samsung drive used to appear there as a non-raid device, but the Crucial doesn't appear. When I tried to boot normally (instead of safe mode), I immediately started getting boot failures. "A Required Device Isn't Connected or Can't Be Accessed" with code 0xc000000e. Going back to the Samsung, it shows up in the Intel Raid config and the system boots fine. Am I missing a driver or some such that's causing the Intel Raid to not see the Crucial drive?
XPS 8910, Crucial P3 SSD not recognized by BIOS