[dm-devel] Snapshot and sparse device

Alasdair G Kergon agk at redhat.com
Fri Oct 15 17:53:34 UTC 2004


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




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