While this is true, it is a block for block copy which is
why you still have to have at least the same # of blocks on
the destination as you have on the source.
-- Adam Fox
NetApp Professional Services, NC
adamfox(a)netapp.com
> -----Original Message-----
> From: Mike Federwisch [mailto:mikef@netapp.com]
> Sent: Monday, July 30, 2001 7:38 PM
> To: Jeffrey Krueger
> Cc: Knight, Jason; 'Kelly McQuarrie'; toasters(a)mathworks.com
> Subject: Re: snapmirror volume sizes
>
>
> Actually, volcopy and snapmirror only transfer the used blocks.
> Unused blocks are not transferred. As and exercise, create a
> large volume with nothing in it. volcopy it to another volume
> and since the source has little data, you will notice that
> the transfer
> is very short even though the volume is large.
>
> Mike Federwisch
>
>
> > Really would be cool if volcopy and snapmirror could
> differentiate between
> > used and un-used blocks and not require the copy of the
> un-used ones. =)
> >
> > Actually, it would be more than cool. It would be very cool.
> >
> > -- Jeff
> >
> >
> >
> > On Mon, Jul 30, 2001 at 04:24:20PM -0500, Knight, Jason wrote:
> > > Kelly,
> > >
> > > You are correct. Same size volumes.
> > >
> > > NDMPCOPY is a way to achieve the goal, it is a utility
> available on NOW and
> > > it basically does a backup of one filer and restore to
> another (or the same
> > > filer) concurrently.
> > >
> > >
> > >
> > > Jason Knight
> > >
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: Kelly McQuarrie [mailto:kellym@sd.us.am.ericsson.se]
> > > Sent: Monday, July 30, 2001 3:32 PM
> > > To: toasters(a)mathworks.com
> > > Subject: snapmirror volume sizes
> > >
> > >
> > > Hello all:
> > >
> > > I think I know that answer to this one but I figured I
> would put it out here
> > > just to make sure I'm right.
> > >
> > > I wanted to use snapmirror to migrate a volume to a
> different filer. This
> > > volume is 225Gigs but it only has 68Gigs of data on it.
> If I'm to use
> > > snapmirror to do this then I need to migrate it to a
> 225Gig volume correct?
> > > I wanted to shrink the volume while I was at it so I'm
> thinking I'm going to
> > > have to do it another way.
> > >
> > > Has anybody had experience with this?
> > >
> > > Thx
> > >
> > > Kelly McQuarrie
> > > Unix System Administrator
> > > Ericsson CDMA Systems
> > >
>
>