Here's the biggest reason I recommend having de-mux'ed duplicated images.

When a tape contains MPX images, it no longer maintains a tar compatible
header.  The only way to remedy that is by duplicating (de-mux by default)
the images.

This allows you, independently of an NBU server, to access the data with GNU
tar or Veritas' modified version of GNU tar.

I know there are a lot of opinions on whether this is a good enough reason
to de-mux, and I shall not argue with any of you, it merely becomes a matter
preference.

Most of my clients like to have an industry standard (nearly standard)
format in their offsite vault.

David
<><><><><><><><><><><><><><><><><><><><>
David A. Chapa
NetBackup Consultant
DataStaff, Inc.
http://www.consulting.datastaff.com
847 413 1144
---------------------------------------
NBU-LSERV AT datastaff DOT com - Adv. Scripting
http://www.xbpadm-commands.com

-----Original Message-----
From: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Steve
Mickeler
Sent: Tuesday, October 30, 2001 1:23 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] multiplexed duplicates



We're running the vault extension on our netbackup setup and I'm finding
that the time to duplicate is taking a long time. 36 hours to duplicate
180 images spanning 14 DLT 35B/70GB tapes.

I'm assuming its taking so long to duplicate the images because its
de-multiplexing the images during the duplicate.

Is there any reason why I wouldnt want to have the duplicates multiplexed
?





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| Steve Mickeler * Network Operations |
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