I have a 621H-TN12R server with a VROC key, eight U.2 drivers and two M.2 SSD. The eight U.2 drivers can be detected. But the M.2 SSD are still missing. How to solve the issue?
Please go to BIOS -> Advanced -> Chipset Configuration -> North Bridge -> IIO Configuration. Under Intel VMD technology -> Intel VMD for volume management device on CPU1 -> Enable VMD config for PCH ports, make sure PCH Root Port 8 & 9 are enabled.