On Sep 23, 2008 22:30 -0500, Eric Sandeen wrote: > Ulf Zimmermann wrote: > Ok, so you really want to zero the unused blocks in-place, and e2image > writing out a new sparsified image isn't a ton of help. > > The tool does that, I guess - but only on an unmounted or RO-mounted > filesystem, right? (plus I'd triple-check that it's doing things > correctly, opening a block device and splatting zeros around, one hopes > that it is!) That is WAY to scary for me on a mounted filesystem. It is racy if the blocks become allocated. Instead, what I always do when creating a sparse image for e2fsck test cases is just "dd if=/dev/zero of=/mnt/fs/zeroes bs=64k; rm /mnt/fs/zeroes" until the filesystem is full, then the file is deleted. This will leave blocks "empty" for the free space in the filesystem without any special tools. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. _______________________________________________ Ext3-users mailing list Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
