|__usb1 1d6b:0002:0404 09 2.00 480MBit/s 0mA 1IF (Linux 4.4.302+
xhci-hcd xHCI Host Controller 0000:00:15.0) hub
|__1-4 f400:f400:0100 00 2.00 480MBit/s 200mA 1IF (Synology
DiskStation 7F00911F3B345A94)
|__usb2 1d6b:0003:0404 09 3.00 5000MBit/s 0mA 1IF (Linux 4.4.302+
xhci-hcd xHCI Host Controller 0000:00:15.0) hub
前后两个usb口都是usb1这个hub下面的，没找到usb2是哪个插口
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