On 05/09/2015 05:00 PM, Leon Fauster wrote:
modern filesystems and image formats do not allocate the whole space if not 
neccessary (qcow2 feature).
Not specifically.  Every disk image type would be sparse if it were 
copied off a disk and back by a tool that wrote them correctly.
qcow2 does support small files on filesystems that don't support sparse 
files, but in that case du and ls will show the same size.
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