Extra SATA ports for X470D4U - custom PCB help

[gnustomp]

I got a few PCBs manufactured by OSH Park and they turned out in working order.

ASRock Rack has created the first AM4 socket server boards, X470D4U, X470D4U2-2T

I made an adapter to use the 2 X470 chipset SATA ports that are routed to the M2_2 connector. That means 8 SATA ports on these boards with no external controllers! [m2-dual-sata] The X470 chipset can have up to 8 SATA lanes in total, with 4 SATA lanes plus 2x SATA express interfaces with 2 SATA lanes each. But on X470D4U and X470D4U2-2T only 6 l…