I guess that's the question, does it need to lock the drive if no other
filer is trying to access it?  I'm thinking along these lines:

filer1 - 6 drives configured for nrst0a thru nrst5a

filer2 - same

I can load a tape into each of the drives and each filer will see it (mt
-f nrstxa status), so every filer sees every drive already.

So, if filer1 is backing up to all 6 drives, and filer2 is not trying to
backup anything, filer1 would use all 6 successfully.  When filer1 was
finished filer2 could use the same 6 drives as long as filer1 was not
trying to access those drives.

Is this incorrect?

~JK

"Trotman, Kevin" wrote:
> 
> You'd have better luck with a $20 dollar bill in Vegas.  ;)
> 
> Can you even configure two media servers that are pointed to the same robot
> drive? I didn't think this was possible without multi-hosted drive support
> (SSO). If you make it a multi-hosted drive, then its not gonna be able to
> lock the drive for Netapp anyway (not supported with SSO).
> 
> Kevin Trotman
> Storage Management Group
> Phone: 817-317-8048
> Cell: 817-307-0451
> email: Kevin_Trotman AT afcc DOT com
>             (Trotman, Kevin)
> 
> -----Original Message-----
> From: Jeff Kennedy [mailto:jlkennedy AT amcc DOT com]
> Sent: Monday, September 17, 2001 1:57 PM
> To: kas AT veritas DOT com
> Cc: Veritas-bu List
> Subject: Re: [Fwd: [Veritas-bu] NetApp backups and multi drives]
> 
> I understand that SSO is not available from Veritas for ndmp yet, this
> is technically not SSO.  Netapp filers see all the tape drives attached
> to the library anyway, whether you configure them in NBU or not.  So the
> question is this:  Can I configure NBU to see all drives for all filers?
> 
> The only issue I can come up with is if NBU causes the filer to
> periodically go out and check the drive status.  If that's the case then
> it could be problematic to have several filers checking drive status on
> the same drive at the same time.  However, if NBU does not cause that,
> then a filer could use all the drives it is configured for in NBU as
> long as no backup overlaps.
> 
> Anyone see another issue with this scenario?
> 
> Thanks.
> 
> ~JK
> 
> Karen Schoenbauer wrote:
> >
> > It looks like he is trying to do SSO for NDMP.  SSO does not support NDMP
> > attached drives.
> >
> > > -----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 Jeff
> > > Kennedy
> > > Sent: Friday, September 14, 2001 1:22 PM
> > > To: Veritas-bu List
> > > Subject: [Fwd: [Veritas-bu] NetApp backups and multi drives]
> > >
> > >
> > > No respondees so far.  Is everyone waiting for a summary or is noone
> > > doing this at all?
> > >
> > > Jeff Kennedy wrote:
> > > >
> > > > I have 4 filers connected via fiber channel to an ATL P6000.  There
> are
> > > > 5 drives dedicated to ndmp, 1 drive per filer for the first 3 filers
> and
> > > > the 4th has 2.  Each filer sees all the drives but only one (or 2)
> > > > drives are configured in NetBackup for each filer.
> > > >
> > > > Question:
> > > >
> > > >         Why can't I configure NetBackup for 4 drives per filer
> > > as long as they
> > > > never backup at the same time?
> > > >
> > > > I know DDA for ndmp is not available but I wonder if the above would
> > > > work since the filers all see the other drives anyway.
> > > >
> > > > I am running Ontap 6.x, qlogic fcal cards, Vixel fiber switch to
> P6000.
> > > >
> > > > Thanks.
> > >
> > > --
> > > =====================
> > > Jeff Kennedy
> > > Unix Administrator
> > > AMCC
> > > jlkennedy AT amcc DOT com
> > > _______________________________________________
> > > Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> > > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> > >
> 
> --
> =====================
> Jeff Kennedy
> Unix Administrator
> AMCC
> jlkennedy AT amcc DOT com
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu

-- 
=====================
Jeff Kennedy
Unix Administrator
AMCC
jlkennedy AT amcc DOT com