[[!comment format=mdwn
 username="david"
 avatar="http://cdn.libravatar.org/avatar/22c2d800db6a7699139df604a67cb221"
 subject="qcow and raw imgs"
 date="2018-10-13T23:48:46Z"
 content="""
Maybe this is obvious, but it's cheap to generate a qcow image \"backed\" by an existing raw image

To quote from a script I have lying around to let a non-root user boot a root owned, read-only image
[[!format txt \"\"\"
qemu-img create -b /srv/vm/$vm.img -f qcow2 $img
\"\"\"]]

"""]]
