Veritas-bu

Re: [Veritas-bu] Restoring NDMP backups over the network (A Darren Dunham)

2008-01-23 10:14:42
Subject: Re: [Veritas-bu] Restoring NDMP backups over the network (A Darren Dunham)
From: "Nick Majeran" <nmajeran AT gmail DOT com>
To: veritas-bu AT mailman.eng.auburn DOT edu
Date: Wed, 23 Jan 2008 08:58:43 -0600
Right, NetApp writes in dump, the Celerra will do either dump or tar,
and who knows, you may even find some vendors using cpio.

One important thing to remember is that, as the backup format for NDMP
is strictly platform dependant, so you can't restore your EMC NDMP
dumps to a NetApp or vise versa.  You also shouldn't try and restore
to a local disk, as this won't work pre-6.0, and is very, very slow
(if it works at all) post 6.0.

-- nick


> On Tue, Jan 22, 2008 at 07:57:01PM -0700, Jeff Cleverley wrote:
> > 1.  Are all NDMP backups classified as dumps, or should we still be able
> > to restore selected files to another location either on a filer or
> > another file system?  The backups are configured for the file system
> > level backups, but of type NDMP.
>
> NDMP as used today doesn't specify a file format, but leaves it up to
> the device.  For your purposes though, the answer is yes.  All NDMP
> backups of a Network Appliance filer will use a dump serialization.
> (Other devices can use very different formats).
>
> > 2.  Are there any known gotchas that will either require us to connect
> > the library to the new filer or prevent us from doing a standard restore?
>
> While the stream is a pretty standard netapp dump, NBU will write extra
> information to the tape to identify it.  I don't think you can just hook
> up an tape written via NBU, type 'restore' and expect it to read it
> properly.  At a minimum, I'd think you'd have to forward the tape to the
> correct file, then skip past the NBU header.  I'm not sure if you could
> do that step again on later volumes if the image spans tapes.
>
> This forum post talks about steps to use 'ufsrestore' on a Solaris
> host.  I would assume similar steps would be required to use 'restore'
> on a filer.
>
> https://forums.symantec.com/syment/board/message?board.id=21&thread.id=36270
>
> --
> Darren Dunham                                           ddunham AT taos DOT 
> 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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