i'm using qemu-kvm(1.1.1) to run a Windows 2008 R2 Virtual Machine. The host machine is running CentOs 6.3. I'm exporting a USB 2.0 Hdd device to the VM using USB-redirection with spice channel. So far, everything is working fine, except that the speed is very slow. I'm getting 5MB/s max, against 25-30 MB/s when the hdd is mounted on hte host directly. Do you have any idea of what could cause such a limitation. Is there any tweak to increase the speed. Any help would be very much appreciated.