Re: [dm-devel] Snapshot and sparse device

[Alasdair G Kergon <agk redhat com>]

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 redhat com