Replying to my own thread... ONTAP is 7.3.2 - I'm guessing this may be the
issue?

On 6 February 2011 10:51, Steven Langdale <steven.langdale AT gmail DOT com> 
wrote:

> Hello all.
>
> I'm attempting to do snapdiff backups on an N series we have here.
>
> TSM Server: 5.5.3
> TSM Client: 6.2.2.0
> Wwindows Proxy: 2003 SP2 + pretty recent patches.
>
> Snapdiffs on my 2 test voulmes work perfectly (after having to do a net use
> to them as a pre-exec), but larger volumes with much more data are failing
> with this (the ?'s are mine):
>
> 02/06/2011 09:05:10 ANS1626E An unexpected error was encountered when
> processing a TSM operation using a hardware or snapshot function.
>    TSM function name : NAHWInterface::naPerformSnapDiff
>    TSM function      : Error invoking ONTAP API snapdiff-iter-next: Parsing
> error in results: Input is not proper UTF-8, indicate encoding !
> Bytes: 0xB4 0x73 0x20 0x47
>
>    TSM return code   : 13001
>    TSM file          : NAHWInterface.cpp (6777)
> 02/06/2011 09:05:10 ANS5250E An unexpected error was encountered.
>    TSM function name : baPerformSnapDiff
>    TSM function      : failed to perform snapdiff
>    TSM return code   : 653
>    TSM file          : backsnap.cpp (5173)
> 02/06/2011 09:05:10 ANS2832E Incremental by snapshot difference failed for
> \\???????\vol01$. Please see error log for details.
> 02/06/2011 09:05:12 ANS5283E The operation was unsuccessful.
>
> I've tried both of the testflags that have come up in my hunting about :
>
> TESTFLAG                 SNAPDIFFNAMEFILTEROFF
> TESTFLAG                 SNAPDIFFONTAPFAP
>
> But still no joy.  IBM article
> http://www-01.ibm.com/support/docview.wss?uid=swg21408335 is saying this
> is a NETAPP issue and there is no workaroud but people who are using the
> testflags seem to be getting successful backups.
>
> Has anyone actually got this to work reliably?
>
> Many thanks
>
> Steven
>