Yes, I've occasionally used the GUI to clone when the automatic cloning
failed and if I recall correctly (it's been a year since I had to do it) it
was demultiplexed.  I suppose the GUI issues a separate nsrclone command for
each save set you specify.

When you clone you're making an exact copy of the save sets, not the tape
they are on, so variances in tape length shouldn't be a problem.
Multiplexing is just the intermix of different save sets on the backup and
where the breaks for another piece of media are is inconsequential.  In fact
I think it is possible to clone from one kind of media to another so if you
cloned from an AIT-2 to an AIT-4 tape you'd use 25% as much tape for the
clone as the original.

Dave

David Werth
Garmin AT, Inc
Salem, Oregon
dave.werth<at>garmin.com

-----Original Message-----
From: Siobhán Ellis [mailto:siobhanellis AT HOTMAIL DOT COM] 
Sent: Wednesday, January 17, 2007 2:36 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Does cloning unmuliplex and make recovery faster?

The answer is not necessarily, as that is not what we have seen in testing.

I used the GUI to clone a volume from like to like, and it de-multiplexed
it. Clone volume does just that. It works out all the savesets, and then
runs that nsrclone command.

Ask yourself this. No two tapes are not exactly the same length. To preserve
the original multiplexing, how would NetWorker achieve that?

Siobhan


On 18/1/07 6:40 AM, "Werth, Dave" <dave.werth AT GARMIN DOT COM> wrote:

> So basically it looks like when multiple SSIDs are specified in a single
> nsrclone command the relative multiplexing between those save sets will be
> preserved.  You can demultiplex it by specifying each SSID in a separate
> nsrclone command.
> 
> Dave
> 
> David Werth
> Garmin AT, Inc
> Salem, Oregon
> dave.werth<at>garmin.com

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