I agree with Paul.

I am in the process of reading the 6.5 release notes, and I do see the VTL 
direct to tape ability.  Looks like a call to veritas will be necessary to 
understand the setup.

Kevin 

-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu 
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Paul 
Keating
Sent: Thursday, August 30, 2007 9:54 AM
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] NetBackup 6.5 VTL direct to tape

VTLs that copy data direct to tape without using a Netbackup media server 
usually mirror the barcode IDs.

Basically, if you have a physical library with barcodes 000AAA to 999ZZZ, the 
VTL will inventory the library and create its own "virtual cartridges" with the 
same barcodes.

Biggest problem is that you're stuck with a 1:1 relationship between virtual 
and physical tape, in order to guarantee the data on the virutal cart fits on a 
physical cart you have to assume really crappy compression, which means, in 
most cases, your physical carts will never be filled to capacity.

The idea then is that if the barcodes are identical, could can pull the VTL out 
of the middle and go back to physical tape, and the catalog is fine. Though in 
reality, depending on where you are in your destaging, Netbackup might thing it 
has a lot of data on tape, that only made it to virtul tape a didn't get down 
to the physical carts.

This type of VTL (Falconstor, for sure) should still allow you to disable the 
destaging feature, and create unique bacodes on the VTL and let your media 
servers vault from VTL to tape. That is Symantec's recommended "best practice".

-- 


> -----Original Message-----
> From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of 
> drpaine10
> Sent: August 29, 2007 4:27 PM
> To: VERITAS-BU AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] NetBackup 6.5 VTL direct to tape
> 
> 
> 
> I'm looking for information on how netbackup allows a VTL to write 
> directly to tape and still maintain the catalog information of the 
> second copy. Is it a requirement to line up the physical and virtual 
> tape id's ?
====================================================================================

La version française suit le texte anglais.

------------------------------------------------------------------------------------

This email may contain privileged and/or confidential information, and the Bank 
of Canada does not waive any related rights. Any distribution, use, or copying 
of this email or the information it contains by other than the intended 
recipient is unauthorized. If you received this email in error please delete it 
immediately from your system and notify the sender promptly by email that you 
have done so. 

------------------------------------------------------------------------------------

Le présent courriel peut contenir de l'information privilégiée ou 
confidentielle.
La Banque du Canada ne renonce pas aux droits qui s'y rapportent. Toute 
diffusion, utilisation ou copie de ce courriel ou des renseignements qu'il 
contient par une personne autre que le ou les destinataires désignés est 
interdite. Si vous recevez ce courriel par erreur, veuillez le supprimer 
immédiatement et envoyer sans délai à l'expéditeur un message électronique pour 
l'aviser que vous avez éliminé de votre ordinateur toute copie du courriel reçu.

_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu 
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu


_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu