Hope you are familiar with NetApp's Snapmirror technology, which is
basically mirroring the NetApp volumes to a secondary filer. With SM2T
(SnapMirror to Tape) the idea is to use tapes as the secondry filer.
So it works at the block level and incremental updates are based on
snapshots.
http://www.bakbone.com/products/network_attached_storage/snapmirror/
BTW, we don't use it (yet) because we are still a Veritas NetBackup shop.
I heard Yahoo! switched from Veritas to BakBone  just becase of this
one feature.

-G

On 10/20/06, Len Boyle <Len.Boyle at sas.com> wrote:
> Sto,
>
> Can you go into a little detail on how Snapmirror to tape works?
>
> Thanks len
>
> -----Original Message-----
> From: veritas-bu-bounces at mailman.eng.auburn.edu [mailto:veritas-bu-bounces 
> at mailman.eng.auburn.edu] On Behalf Of Sto Rage(c)
> Sent: Friday, October 20, 2006 6:49 PM
> To: veritas-bu at mailman.eng.auburn.edu
> Subject: Re: [Veritas-bu] NDMP data timeout
>
> I wish Veritas would come up with a way to do Snapmirror to Tape. If
> BakBone (NetVault) can do this for years why can't Veritas??
>
> -G
>
> On 10/20/06, Darren Dunham <ddunham at taos.com> wrote:
> > Is there any variable that controls the timeout for NDMP sessions?  I
> > have a netapp that has grown so large that the phase I portion of the
> > dump takes in excess of 8 hours.  Netbackup appears to abort the
> > backup right at the 8 hour mark if the backup hasn't reached the
> > point of sending data to the tape yet.  I believe that even if I'm only
> > backing up a qtree, the dump process still has to do phase I for the
> > entire volume, so this can't be easily broken up.
> >
> > We have lots of things under consideration for this beast, but none of
> > them can be done in the short term.  I'd like to extend the timeout on
> > the NDMP backup.  Anyone know if this is possible?
> >
> > NBU 6.0/MP3 on Linux.  Netapp is hooked to direct tape.
> >
> > Thanks!
> > --
> > Darren Dunham                                           ddunham at taos.com
> > Senior Technical Consultant         TAOS            http://www.taos.com/
> > Got some Dr Pepper?                           San Francisco, CA bay area
> >          < This line left intentionally blank to confuse you. >
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> >
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