I have used NetBackup for 4 years with multistreaming.  I have never, nor
have I ever heard of, a single restore job automatically using multiple tape
drives.  What should work is kicking of a separate job for each image that
is on a different tape.  That would require selecting different backup
images for each job and verifying that the image is not on the same tape.

NetBackup has never supported one restore job, using multiple tape drives.


Ebon Nash

-----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 Jason
Helfman
Sent: Friday, March 19, 2004 5:37 PM
To: Cornely, David
Cc: 'veritas-bu AT mailman.eng.auburn DOT edu'
Subject: Re: [Veritas-bu] Restores only using 1 tape drive


I'd like to find this out myself, because I've asked Veritas and they 
said it can only do one tape at a time on restores of this nature. Not 
sure about others. We only backup via NDMP. Maybe it is that way for 
NDMP, only.

Cornely, David wrote:
> Well, that's different from what I've been told and what I've seen in the
> past.  
> I was under the impression that if you backed up using multiple
streams/tape
> drives that's the way your restore would run.  And in fact I've tested
this
> on other media servers and witnessed this behavior first hand.  I'm
thinking
> there's either a misconfiguration or bug I'm missing.
> 
> -Dave
> 
> -----Original Message-----
> From: Jason Helfman [mailto:jason.helfman AT ticketmaster DOT com]
> Sent: Friday, March 19, 2004 11:24
> To: Cornely, David
> Cc: 'veritas-bu AT mailman.eng.auburn DOT edu'
> Subject: Re: [Veritas-bu] Restores only using 1 tape drive
> 
> 
> This isn't a problem. It's a feature of Netbackup ;)
> 
> It won't restore in the same way it backed up. It can only restore on 1 
> tape at a time.
> 
> Cornely, David wrote:
> 
>>Hello,
>>
>>Has anyone else seen this problem?  The backup uses multiplexing and
>>multiple streams across several tape drives yet when I kick off a restore
> 
> of
> 
>>the backup it only utilizes 1 tape drive.  I've got plenty available as
>>well.
>>The environment is NBU3.4_5 running on Solaris 2.6/8.  It's an alternate
>>client restore so I don't know if that could have something to do with it.
>>We've seen this with other restores - any insight would be helpful.
>>
>>TIA,
>>
>>-Dave
>>
>>_______________________________________________
>>Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
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