On Tue, Oct 12, 2004 at 05:49:12PM +0200, Guillaume Lacôte wrote: > 23 I read that snapshotting performs copy-on-write. If you write to the original device (/dev/zero) yes: but the snapshot itself doesn't have to be read-only - it can also be written to, making a sparse-device. Alasdair -- agk at redhat.com