I use my "custom" TMPDIR variable with virt-sparsify. I just type: export -p TMPDIR=/mnt/vm/tmpdir I do that for a couple reasons: either my /tmp is on a ramdisk or /tmp is on my (ssd) rootfs and i dont want to "full" my / with the temporally files. Thats said, i was thinking to "ask" OR sending a patch for adding a tmpdir OPTION for virt-sparsify like virt-sparsify -t /mnt/vm/tmpdir f18.qcow2 f18.qcow2.spars before contribute .... i was eager to ask for your thoughts. Do you believe this would be useful or too much trouble for nothing ? Do you believe that we could use a TMPDIR option for liguestfs in general ? Thank you -- Evaggelos Balaskas - Unix System Engineer http://gr.linkedin.com/in/evaggelosbalaskas