Hi,
On 25.06.2011 03:32, Flypen CloudMe wrote:
Hi,
Does anyone successfully use USB drive in Windows7 guest? If I pass a
USB drive to Windows7 guest, Device Manager may find this device but
the USB mass storage driver can't be installed successfully. I have
tried many times. Is the emulated USB controller is so old and
Windows7 doesn't support it? I can't use PCI passthrough feature to
pass the whole USB controller to VM, because the hypervisor also needs
to use some USB ports.
If I use Windows XP or Linux, the USB drive can work well.
Try the following when starting qemu-kvm. Replace sdX with your USB device.
...
-device usb-ehci,id=ehci \
-drive if=none,id=usbstick,file=/dev/sdX \
-device usb-storage,bus=ehci.0,drive=usbstick \
...
If would like to add the device while your VM is running, you may omit
the last two lines and add this one instead:
-monitor telnet:127.0.0.1:11111,server,nowait,nodelay
Add the device using the two commands below:
echo "drive_add 0 id=usbdrive,if=none,file=/dev/sdX"| /bin/nc -w1
127.0.0.1 11111
echo "device_add usb-storage,id=usbdrive,bus=ehci.0,drive=usbdrive"|
/bin/nc -w1 127.0.0.1 11111
Remove the device by first ejecting the USB drive under Win7. Then use
this line to remove the drive from the VM:
echo "device_del usbdrive"| /bin/nc -w1 127.0.0.1 11111
Regards
André
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