Has anyone else been able to solve this?
I too am having the same issue.
Please see image:
EDIT: I was able to solve this issue by disabling my RAID1 array by disabling both SATA ports from the BIOS, booting up with just my bootable volume (which is an SSD), which then forced the Intel RST appication to re-verify the disk to be a system disk, then rebooted and re-enabled my SATA ports, thereby re-enabling my RAID1 array.
Hope this helps!
Message was edited by: Kamika007z