Backup Central

Customer has a Netapp; trying to implement -snapdiff backups on several large shares.
Having intermittent failures that make no sense to me.
Running the backup with:

dsmc -snapdiff -optfile=blah.opt

blah.opt contains:
..
domain /filer/sharepath1 /filer/sharepath2 etc

We can get the first backup with -snapdiff, and usually the second.
Then at some point, we start getting

ANS2831E Incremental by snapshot difference
cannot be performed on 'volume-name' as
it is not a NetApp NFS or CIFS volume.


Obviously it IS a NetApp volume as we get one or more snapdiff backups before the problem starts.
(And we can log in to the filer with the same credentials, and we can map a drive letter to the share.)
I'm not sure whether this is a NetApp issue or a Windows/CIFS/network issue that makes -snapdiff lose its brains.

Anybody seen this behavior before?
Any suggestions where to look next?
Thanks!
W


Wanda Prather | Senior Technical Specialist | wprather < at > icfi.com<mailto:wprather < at > icfi.com> | www.icf.com<http://www.icf.com>
ICF International | 401 E. Pratt St, Suite 2214, Baltimore, MD 21202 | 410.539.1135 (o)
Connect with us on social media<http://www.icfi.com/social>

Hi Wanda,
Is your NetApp a vFiler? If yes it will not work until NetApp implement the SnapDiff API to the vFilers.
I have talk to NetApp a couple of times and it seams like they maybe going to implement the Snapdiff API in the end of Q4.

Best Regards
Christian Svensson

Cell: +46-70-325 1577
E-mail: Christian.Svensson < at > cristie.se
Supported Platform for CPU2TSM:: http://www.cristie.se/cpu2tsm-supported-platforms

________________________________________
Från: Prather, Wanda [wPrather < at > ICFI.COM]
Skickat: den 29 januari 2012 23:24
Till: ADSM-L < at > VM.MARIST.EDU
Ämne: intermittent errors on -snapdiff backups

Customer has a Netapp; trying to implement -snapdiff backups on several large shares.
Having intermittent failures that make no sense to me.
Running the backup with:

dsmc -snapdiff -optfile=blah.opt

blah.opt contains:
..
domain /filer/sharepath1 /filer/sharepath2 etc

We can get the first backup with -snapdiff, and usually the second.
Then at some point, we start getting

ANS2831E Incremental by snapshot difference
cannot be performed on 'volume-name' as
it is not a NetApp NFS or CIFS volume.


Obviously it IS a NetApp volume as we get one or more snapdiff backups before the problem starts.
(And we can log in to the filer with the same credentials, and we can map a drive letter to the share.)
I'm not sure whether this is a NetApp issue or a Windows/CIFS/network issue that makes -snapdiff lose its brains.

Anybody seen this behavior before?
Any suggestions where to look next?
Thanks!
W


Wanda Prather | Senior Technical Specialist | wprather < at > icfi.com<mailto:wprather < at > icfi.com> | www.icf.com<http://www.icf.com>
ICF International | 401 E. Pratt St, Suite 2214, Baltimore, MD 21202 | 410.539.1135 (o)
Connect with us on social media<http://www.icfi.com/social>
=

No, not a vfiler.
And we do get some snapdiffs. It's just intermittent failrues.

Wanda

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L < at > VM.MARIST.EDU] On Behalf Of Christian Svensson
Sent: Monday, January 30, 2012 2:43 AM
To: ADSM-L < at > VM.MARIST.EDU
Subject: [ADSM-L] SV: intermittent errors on -snapdiff backups

Hi Wanda,
Is your NetApp a vFiler? If yes it will not work until NetApp implement the SnapDiff API to the vFilers.
I have talk to NetApp a couple of times and it seams like they maybe going to implement the Snapdiff API in the end of Q4.

Best Regards
Christian Svensson

Cell: +46-70-325 1577
E-mail: Christian.Svensson < at > cristie.se
Supported Platform for CPU2TSM:: http://www.cristie.se/cpu2tsm-supported-platforms

I had similar problems when using snapdiff. The fix was to have a pre-exec
map all of the volumes you wanted to backup. It doesn't matter what the
drive letters are as you carry one backing up the UNC.

Worth a try if you're not ding it already.

Steven

On 31 January 2012 15:41, Prather, Wanda <wPrather < at > icfi.com> wrote:

No, not a vfiler.
And we do get some snapdiffs. It's just intermittent failrues.

Wanda

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L < at > VM.MARIST.EDU] On Behalf Of
Christian Svensson
Sent: Monday, January 30, 2012 2:43 AM
To: ADSM-L < at > VM.MARIST.EDU
Subject: [ADSM-L] SV: intermittent errors on -snapdiff backups

Hi Wanda,
Is your NetApp a vFiler? If yes it will not work until NetApp implement
the SnapDiff API to the vFilers.
I have talk to NetApp a couple of times and it seams like they maybe going
to implement the Snapdiff API in the end of Q4.

Best Regards
Christian Svensson

Cell: +46-70-325 1577
E-mail: Christian.Svensson < at > cristie.se
Supported Platform for CPU2TSM::
http://www.cristie.se/cpu2tsm-supported-platforms