Veritas-bu

Re: [Veritas-bu] Netbackup verify at write time

2008-07-24 01:38:20
Subject: Re: [Veritas-bu] Netbackup verify at write time
From: "Marelas, Peter" <Peter.Marelas AT team.telstra DOT com>
To: "dave.markham AT fjserv DOT net" <dave.markham AT fjserv DOT net>, "veritas-bu AT mailman.eng.auburn DOT edu" <veritas-bu AT mailman.eng.auburn DOT edu>
Date: Thu, 24 Jul 2008 15:28:27 +1000
Tape drives implement ECC much like memory. If you trust your memory you should 
trust your tape drive assuming you don't throw them around.

http://findarticles.com/p/articles/mi_qa3751/is_200307/ai_n9275590/pg_8

Regards
Peter Marelas

-----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 Dave 
Markham
Sent: Wednesday, 23 July 2008 8:45 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Netbackup verify at write time

Guys management here are fussing around how are we sure backups are successful 
or they can be restored from without doing an actual restore.

I was under the impressions that some sort of verify or sum check operation was 
done at write time and that if a status 0 was returned it was a pretty good 
indication backups would be able to be restored.

Taking all physical factors aside ( e.g tapes being bashed around making them 
unusable ) the other way to verify is using bpverify but i'm just wondering if 
its needed.

Anyone shed any light on this for me?

I know the only sure fire way of knowing a backup is fine is performing a 
restore, but unless a full restore is done (which has its own problems of space 
etc) then what other assurances are there?

Netbackup 5.0MP7, 6.0MP4 on a mixture of Solaris 9 and 10

Cheers
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