Re: [Veritas-bu] Backing up unformatted primary partitions
2010-04-08 13:54:32
Exactly, did the \\.\E: backup,
results in a failure (status code 1), but it chugs through all the contents OK
until the end. Here’s some info for those interested...
dd for Windows seems to have the same issue, it chugs through,
creating an image of the unpartitioned drive, but then spits out an error at
the end “Error reading file: 87 the parameter is incorrect”.
dd.exe if=\\.\z: of=f:\my_backup.img bs=1M
But, it reports the same number of records in and out, and
leaves behind the disk image on disk, which is promising. So to “test”
a recovery, I format the drive (Z:\ in this case), write some dummy data onto
it, and then attempt the recovery:
dd.exe if=f:\my_backup.img of=\\.\z: bs=1M
Which progresses for an appropriate amount of time (similar to
the backup process), and doesn’t spit out error at the end, and my drive
shows up as unpartitioned again. It also reports the same number of records in
and out as the backup, so I’m optimistic it “works”. I think
I’m going to actually go ahead and test this when the techs show up to
install it.
So yes, this is all on external SAN storage, so my backup plan will
be to replicate the primary volume across to my other site, and take daily
snapshots of that replicated LUN. Not my favourite thing to do, but will do
the trick and probably satisfy my business unit.
Cheers.
From: Nardello, John
[mailto:john.nardello AT cgi DOT com]
Sent: April 8, 2010 1:18 PM
To: Jonathan Dyck
Cc: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: RE: [Veritas-bu] Backing up unformatted primary partitions
Quick check, you said you tried backing this up already - do you
mean as a raw partition ? i.e. File list looked something like:
If
that's not working for you then I agree with Jeff, the best you could hope for
would be removing the single point of failure by using a clone of some kind.
If
that does work.....then you'll need to quiescence that volume somehow (backup
mode, shutdown the app, whatever) before the backup, or go with a clone of the
LUN and then back up the clone as a raw partition.
Just
make sure to test restores before you sign off on the final version. =)
From: Lightner, Jeff [mailto:jlightner AT water DOT com]
Sent: Thu 4/8/2010 9:59 AM
To: Jonathan Dyck; Nardello, John
Cc: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: RE: [Veritas-bu] Backing up unformatted primary partitions
With the sticking accelerator issue a Corolla
might go as fast as a Ferrari eventually. ;-)
Of course you haven't said what your disk storage is - mentioning LUN makes me
think it is an external storage array. Some of those have ways to copy
data between arrays so if you have more than one array of the same manufacture
you might look into that as a possibility. Doesn't get it offsite but
does get rid of the single point of failure.
-----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 Jonathan Dyck
Sent: Thursday, April 08, 2010 12:16 PM
To: Nardello, John
Cc: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: Re: [Veritas-bu] Backing up unformatted primary partitions
Absolutely. They wanted to sell us a 15-20k piece of add-on software that
archives data from the unformatted into "normally" readable content
on another LUN. We're trying to figure out if we can avoid that, as we
don't have any archival requirements for this data, so it'd be one of those
"buying a Ferrari when you need Corolla" kind of deals.
-----Original Message-----
From: Nardello, John [mailto:john.nardello AT cgi DOT com]
Sent: April 8, 2010 11:49 AM
To: Jonathan Dyck
Cc: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: RE: [Veritas-bu] Backing up unformatted primary partitions
Just to ask the obvious question - how does the vendor expect you to perform
backups of their proprietary system ? Do they have any recommendations that
might help ?
- John Nardello
"Your backups are only as good as your restores."
-----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 Jonathan Dyck
Sent: Thursday, April 08, 2010 6:20 AM
To: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: [Veritas-bu] Backing up unformatted primary partitions
Hi all,
I have the pleasure of trying to protect data for a system that writes (obviously
in a proprietary manner) data to an unformatted partition in Windows.
I've read the guides, and see that it's unsupported by NBU (I tried
anyways, it teases you by actually backing up the blocks, then fails with
a status code 1).
Just curious, has anyone out there tried to do this without the use of
hardware snapshots (which I think I'll have to fall back on)?
Cheers,
Jon
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