不畏懼

yum install usbutils -y

[root@localhost ~]# lsusb
Bus 002 Device 017: ID 1058:1078 Western Digital Technologies, Inc. Elements Portable (WDBUZG)
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

[root@localhost ~]# virsh edit windows2008R2-oldweb-backup

    <hostdev mode='subsystem' type='usb' managed='yes'>
      <source>
        <vendor id='0x1058'/>   對應lsusb中的1058
        <product id='0x1078'/>    對應lsusb中的1078
        <address bus='2' device='17'/>    對應lsusb中的  bus 和device 數字
      </source>
      <address type='usb' bus='0' port='2'/>
    </hostdev>