Hi Allan,
Thanks for your reply.
I enabled UEFI in BIOS and though the drives are visible in the system view, it won't allow me to create any sort of RAID (0/1/5/10) with those volumes. It will only let me include my SSD and secondary application drive. Is there something else that I'm missing? Windows will let me create a 1 or 0 RAID in Disk Management, but IRST is giving me no love.