I'm working on a home-NAS and bought a Lenovo Serveraid M5110 to server as a RAID controller. The MOBO and CPU are from a DELL OPTIPLEX 7010, I3-3220. As of now I can access WebBios fine, and have setup a virtual disk from one hard drive as a test. It's set as the primary boot device as well. I've flashed the DELL BIOS to A29 thinking this would help but it hasn't. My problem is as follows: I can't install Windows, via USB installer, to the virtual drive. It just doesn't see it. What might be causing this and how can I find out? The Raid controller only appears in the BIOS under System information, nothing takes it's place in the boot order, which is set to Legacy Boot right now, but setting it to UEFI doesn't seem to change anything either. Can anybody help with this please?