title: Boot a native OS on a hard disk as a virtual machine
body: <p>I'm searching for a solution to boot a native OS on a hard disk as a virtual machine.</p>
  
  <p>It's like what VMware Fusion did on a Mac which boots Windows in Boot Camp as a virtual machine.</p>
  
  <p>In detail, I have Windows installed on /dev/sda2 and Ubuntu 11.10 on /dev/sda5.</p>
  
  <p>Is there anyway to use a virtual machine software to boot the Windows on /dev/sda2 as a virtual machine while I'm using Ubuntu?</p>