Your suggestion would be? See my reply above about using a loopback-file. It's a one-liner: dd if=/dev/zero of=/vols/customer123/vol234 seek=$SIZE bs=1 cou

Your suggestion would be? See my reply above about using a loopback-file. It's a one-liner: dd if=/dev/zero of=/vols/customer123/vol234 seek=$SIZE bs=1 count=1 There's surely quite a few other ways to skin this cat (eventually arriving at the multi-tenancy features in proprietary SAN appliances), but this seems the most obvious one.