bthoven Posted November 22, 2021 Posted November 22, 2021 (edited) I attach a list of IMMOU groups on my server here. I did not use ACS override. I did plug my usb drive to every port in order to identify which physical usb ports belong to which group, and the result is as the drawing attached here. I'm sure the drawing is right because I did try plugging my usb drive to every port 3 times. I have 12 physical usb ports: - 2 usb2 and 2 usb3 on top of the case - 2 usb2 inside the case where one of the port have my Unraid boot drive - 4 usb2 ports at the backpane - 2 usb3 ports at the backpane Physically inside the CPU box, the mainboard has 1 usb2 and 1 usb3 connectors. For the usb2 connector, I connect a splitter usb hub board which splits it into two connectors, one of which connects to the 2 usb ports on top of the case, the other one connects to a 2-port usb header (1 port has my Unraid boot drive). The usb3 connector on mainboard connects to the 2-port USB3 on top of the case. As shown in the drawing and IMMOU list, Group 16 is already bound to vfio and passthrough to my Win11 VM, these two ports are for mouse and keyboard. Group 26 covers 2 usb3 ports at backpane, not being used. What looks strange to me is Group 21 which covers all internal case usb2 ports, usb2 and usb3 ports on top of the case, and the remaining usb2 ports on the backpane. I intend to also passthrough all the usb ports on the top of the case to my Win11 VM, but it is not possible now because they belong to the same group as my unraid boot drive usb. My question are, - is it possible that one IMMOU group covers both usb2 and usb3 ports? - will the ACS override, either with downstream or multifunction option enabled, splits the ports further, to individual port?, so that I have more flexibility in passing through them? Edited November 22, 2021 by bthoven Quote
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