Our Physical PCIE extend card for naexp is still developping, so you can only read/write disk firmware with SATA port on motherboard. But you can make or buy your own USB relay for power control. As shown below.
It’s very simple to use. It’s a MCU-51 computer to control relays through the COM port. One control 5V port and another one control 12V port. So you can make it by yourself easily or buy one.Finally you need fill the controller CMD to na-exp like this.
So you have a low price power control now. Naexp can hardware-reset the disk with your power controller.