A nice feature in XEN that I miss in KVM is the ability to use a single partition as a disk image. In XEN you can do
disk = [ 'file:/dev/vg0/img_root,sda1,r' ]
and you can also safely mount /dev/vg0/img_root when the virtual machine is not powered on.
With KVM you’re out of luck, or at least my googling returned lots of questions and no solutions.
Well, there is a not so hard way of working around the issue.
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