Originally Posted by mrtwice
I have a machine with a 3ware hardware raid card in raid 5, core 2 quad, and 8GB ram. Installing Windows 7 directly on the hardware took 15:34 (mm:ss) and doing it with qemu/kvm and a qcow2 type image took 42:10. That seemed like a pretty significant slow down to me. Is this level of degradation expected or have I done something wrong? The command I used to run the kvm install was:
kvm -m 2048 -hda win7.img -cdrom /media/win7.iso -boot d -usb -smp 2
You should check, that you have actually enabled kvm. You can do this by running the command 'info kvm' inside the qemu monitor. If kvm support is not enabled, you may not have loaded the required kernel modules (modprobe kvm; modprobe kvm-(intel/amd)
Personally I have seen a speed boost with the combo kvm-kmod-2.6.32 and the recently "released" qemu-kvm-0.12.0-rc2. Note, those packages are not intended for production servers, but give them a try.