From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?ISO-8859-1?Q?Andr=E9_Weidemann?= <Andre.Weidemann@web.de>
Subject: Re: Does anyone successfully use USB drive in Windows7 guest?
Date: Sat, 25 Jun 2011 14:24:02 +0200
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References: <BANLkTimXNUkqb_3Mhwmgt_epWNFm7U+Y8w@mail.gmail.com>
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Cc: kvm@vger.kernel.org
To: Flypen CloudMe <flypen@gmail.com>
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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 need=
s
> 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 dev=
ice.

=2E..
-device usb-ehci,id=3Dehci \
-drive if=3Dnone,id=3Dusbstick,file=3D/dev/sdX \
-device usb-storage,bus=3Dehci.0,drive=3Dusbstick \
=2E..

If would like to add the device while your VM is running, you may omit=20
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=3Dusbdrive,if=3Dnone,file=3D/dev/sdX"| /bin/nc -w1=
=20
127.0.0.1 11111
echo "device_add usb-storage,id=3Dusbdrive,bus=3Dehci.0,drive=3Dusbdriv=
e"|=20
/bin/nc -w1 127.0.0.1 11111

Remove the device by first ejecting the USB drive under Win7. Then use=20
this line to remove the drive from the VM:
echo "device_del usbdrive"| /bin/nc -w1 127.0.0.1 11111

Regards
  Andr=E9