I have 2 NUC5i5RYK units that I cannot make bootable to the mSata drives. If I try to install Windows 7 x64, I can partition the drive, but it will not allow me to install the OS to it. In the BIOS, I can see the mSATA drive under the Devices/SATA menu, but the drive does not show up in the UEFI boot window. I have tried updating the BIOS to the most recent version, and I have tried multiple mSATA drives, but they all give me the same issue. The mSATA drive was working, but I connected a SATA SSD drive torecover the OS to, and after that the system will no longer boot the mSATA drive, or allow me to install the operating system.
Steps for Windows® 7 installation on Intel® NUC Kits 5th generation.
Go to BIOS
Enable UEFI and Legacy boot options at Boot tab.
Enable USB Legacy and disable xHCI at Devices>USB tab
xHCI disables USB3.0; however, we can activate the option after installing OS and drivers.
Plug USB bootable drive (Win7 installed) to the NUC and restart the NUC, keep tapping F10 and select the option UEFI – USB bootloader.
It is recommended to format the 2.5” Hard Disk Drive or M.2 SSD.
mSATA drives were supported on previous NUC versions, such as, D34010WYK or D54250WYK.