Hello Ron, * Ron Yorston <rmy@xxxxxxxxxxxxx> [090525 09:49]: > I've written a tool to zero freed blocks in ext2/ext3 filesystems, as well > as a (half-baked) kernel patch. Details here: > http://intgat.tigress.co.uk/rmy/uml/sparsify.html nice work! While talking about sparse files: Do you know if there is an option for qcow2 to reclaim zeroed out blocks (like a sparse in userland)? I hope that this functionality hits upstream. It could also used to provide a secure file deletion. Thomas -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html