You can duplicate the image on disk to tape, then expire the disk copy - the
image DB tracks everything just fine.  No, it's not automatic like the disk
staging in v5.0 but it works well.

-M

-----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 Major,
Rusty
Sent: Wednesday, April 28, 2004 8:49 AM
To: Thomas Tschida; veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] SSO with disk?


>From my understanding, 4.5 doesn't support true disk-disk-tape. Sure, you
could backup to a disk STU, then backup these images to tape without a
problem. But 4.5 doesn't have a way to relate the meta file info between the
backups to disk and the backup to tapes.
What I'm trying to say is that your restore process will now be two steps:
find the image backed up from disk STU, restore it, then find the file and
restore it. It might even involve importing and other trickery to get it to
work how you want.

5.0 is supposed to support this technology, but that's about all I know of
it. Besides that, 5.0, according to the list, is not really a good solution
at this point.

If you're really interested in doing d-d-t right now, check out ADIC's
Pathlight VX, or other similar products.

Rusty

> -----Original Message-----
> From: Gary Andresen [mailto:gary.andresen AT pnwdata DOT com]
> Sent: Tuesday, April 27, 2004 6:34 PM
> To: 'Thomas Tschida'; veritas-bu AT mailman.eng.auburn DOT edu
> Subject: RE: [Veritas-bu] SSO with disk?
> 
> 
> Short answer no.
> 
> Disk storage units are disk storage (with a file system) 
> directly attached
> to a media server (granted the disks could be on a SAN) and 
> would not be
> shared. To keep your dup traffic off the net you would want 
> to make sure
> the disk STU and the tape are on the same media server.
> 
> Potentially you could use CFS from VERITAS where the media 
> servers used a
> cluster file system between them. However making the CFS 
> cluster with the
> media servers involved could be a somewhat interesting configuration
> challenge :--).
> 
> Gary Andresen 
> Impossible Happens, Plan Ahead 
> Pacific Northwest Data Inc. 
> Tel: 503.701.5185 
> Fax: 503.692.3910 
> gary.andresen AT pnwdata DOT com 
> www.pnwdata.com 
> 
> > -----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 Thomas Tschida
> > Sent: Tuesday, April 27, 2004 1:51 PM
> > To: veritas-bu AT mailman.eng.auburn DOT edu
> > Subject: [Veritas-bu] SSO with disk?
> > 
> > Hello all,
> > 
> > we are looking at migrating to Disk-Disk-Tape.  We will likely run
> > primary backups to disk, and then duplicate to tape.  We 
> have a library
> > with 12 drives and SSO for all drives.  Does anyone know if 
> disk based
> > storage units can take advantage of SSO, or should we keep the SSO
> > licenses associated with the tape drives so the media 
> servers can take
> > advantage when running duplicates?
> > 
> > Any recommendations or info is appreciated.
> > 
> > Tom Tschida
> > United Defense
> > 
> > 
> > _______________________________________________
> > Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> 
> 
> _______________________________________________
> Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> 

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