====== Create mountable compressed disk image ======

  - Install tools<code bash>
apt install -y qemu-utils libguestfs-tools
</code>
  - Sparsify the disk<code bash>
virt-sparsify -v --in-place disk.img
</code>
  - Convert the disk to dynamic VHD<code bash>
qemu-img convert -p -o subformat=dynamic -f raw -O vpc disk.img disk.vhd
</code>

===== Batch =====
<code bash>
for i in *.img; do virt-sparsify -v --in-place $i; done
for i in *.img; do echo $i; qemu-img convert -p -o subformat=dynamic -f raw -O vpc "$i" "${i%%.img}.vhd"; done
</code>

===== See Alsos =====
  - http://libguestfs.org/virt-sparsify.1.html
  - https://docs.openstack.org/image-guide/convert-images.html

{{tag>disk-image libguestfs qemu-img}}