Picked up a used desktop with a M.2 SATA SSD and SATA HDD. BIOS was set to Legacy (not UEFI) and SATA mode was set to RAID.
I figured I’d install Windows 10 to the SSD, since it’s plenty large at…
Can’t boot Windows from M.2 SATA SSD?
Source: [H]ardOCP – Can’t boot Windows from M.2 SATA SSD?