Although I do have to agree with that, unfortunatly reality impinges it's
way into my ideal world. We have a number of large images and to go through
the tapes to demux them can take up to 4 hours an image (I've timed it).
Given the number of images I'm dealing with here sometimes on a daily basis,
there arn't enough hours to a day to demux my duplicates.

Unless someone knows some secret trick I don't.

Jason

> -----Original Message-----
> From: David A. Chapa [mailto:david AT xbpadm-commands DOT com]
> Sent: October 30, 2001 15:29
> To: Steve Mickeler; veritas-bu AT mailman.eng.auburn DOT edu
> Subject: RE: [Veritas-bu] multiplexed duplicates
> 
> 
> 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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> 
> .-------------------------------------.
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> 
> 
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