Right.

So what do you with the rest of your virtual drives?

For example, you have 2 physical drives, and 5 virtual.
Do your "in-line" jobs use two virtual drives and two physical drives 
simulataneously, and the other virtual drives are available for non-in-line 
backups? ie. backups that are not required to be duped to tape, or at least not 
immediately?

I guess another question is, when you say "in-line", are you referring to 
Netbackup's "Inline Tape Copy", which writes to two or more devices 
simultaneously, or are you talking about  VTL function where there's a physical 
tape behind every virtual tape?

Paul


-- 


> -----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 Clem Kruger
> Sent: August 30, 2007 5:11 PM
> To: Paul Keating; VERITAS-BU AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] NetBackup 6.5 VTL direct to tape
> 
> 
> NO, you can have as many virtual drives as you like.
> 
> The in-line copy will use as many physical tapes as you have 
> setup for the media server.
> 
>  
>  
>  
>  
> Kind Regards,
> Clem Kruger
>  
> -----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: 30 August 2007 17:10 PM
> To: VERITAS-BU AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] NetBackup 6.5 VTL direct to tape
> 
> OUCH!!!!
> 
> So you mean to tell me that you only have as many virtual 
> drives as you
> have physical drives?
> 
> That wouldn't have even made it onto my "for consideration" 
> list, when I
> was evaluating VTLs.
> 
> Paul
> 
> -- 
> 
> 
> > -----Original Message-----
> > From: Clem Kruger [mailto:clem AT re-thinking-it DOT com] 
> > Sent: August 30, 2007 11:02 AM
> > To: Paul Keating; VERITAS-BU AT mailman.eng.auburn DOT edu
> > Subject: RE: [Veritas-bu] NetBackup 6.5 VTL direct to tape
> > 
> > 
> > We have used VTL's and tape drives together. Using real 9940 
> > tape drive and the VTL, we have set up in-line backups and 
> > have found that the process is totally automated. All daily 
> > backups are written to VTL and the weekly and monthly backups 
> > are in-line backups. Every Monday there is a vaulting policy 
> > which writes the catalogue to tape. The catalogue tape and 
> > the weekly tapes are then ejected and sent off site.
> > 
> > The in-line solution is as slow as your slowest tape drive. 
> > We have seen that our weekly backups run at some 10% slower 
> > than the backups written directly to the VTL.
> > 
> ==============================================================
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