space. Use @code{qemu-img info} to know the real size used by the
image or @code{ls -ls} on Unix/Linux.
+@item host_device
+
+Host device format. This format should be used instead of raw when
+converting to block devices or other devices where "holes" are not
+supported.
+
@item qcow2
QEMU image format, the most versatile format. Use it to have smaller
images (useful if your filesystem does not supports holes, for example