All snapshots are copy on right (or act that way), or they're not a 
snapshot.  That's the definition of a snapshot.  If it's a full copy, then 
it's a copy.  I'm not sure if Veritas does this with their volume manager 
yet, but copies like this are usually for split-mirror backups.  This is 
like EMC's BCV, Compaq's Clone, or Hitachi's ShadowImage.

(I say "or act that way" because there is one filesystem, WAFL, that acts 
like copy on right, but they don't do it like anyone else.  But it's still 
not a full copy.)

At 11:49 AM 7/9/2001 -0700, Roger B.A. Klorese wrote:
>On Mon, 9 Jul 2001, Lumpkin, Buddy wrote:
> > Also, snapshots are a full atomic copy operation while checkpoints
> > return almost instantly and have a copy-on-write behavior thereafter.
> > The result at least appears to be instantaneous.
>
>Volume snapshots are as you describe.  File system snapshots are
>copy-on-write.

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W. Curtis Preston
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