We are using snapdiff for almost a year. We use some trick's found in the forum.

First, mount your share before starting the backup " net use \\dffdg\fgdgj"
Second, If you talking to a NAS like a Netapp, you need to have http access For 
TSM : httpd.admin.enable    on, and use command tsm> "set password -type=filer 
sdfggd $logname".

Be sure to have at least tsm6.2.2 client and Ontap 7.3.3 if you want the 
Unicode work!
Don't forget to do full scan at least once a month just in case it misses some 
files.

 Alain



-----Message d'origine-----
De : ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] De la part de 
David Bronder
Envoyé : 27 juin 2011 16:24
À : ADSM-L AT VM.MARIST DOT EDU
Objet : [ADSM-L] snapdiff advice

Hi folks.

I'm trying to get snapdiff backups of our NetApp (OnTAP version 8.0.1P5)
working so I can move away from everybody's favorite NDMP backups...

So far, I'm not having much luck.  I don't know whether I'm just Doing
It Wrong (tm) or if something else is going on.  In particular, on both
Windows 2008 R2 (6.2.3.0) and RHEL 5.6 (6.2.2.0), I'm getting failures
like the following, depending on the dsmc invocation:

  ANS1670E The file specification is not valid. Specify a valid Network
           Appliance or N-Series NFS (AIX, Linux) or CIFS (Windows) volume.

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

(These are shares at the root of full volumes, not Q-trees.  I'm using a
CIFS share for the Windows client, and an NFS share for the Linux client,
with the correct respective permission/security styles.  TSM server is
still 5.5, but my understanding is that that should be OK.)

For those of you who have snapdiff working, could you share any examples
of how you're actually doing it?  E.g., your dsmc invocation, how you're
mounting the share (must a Windows share be mapped to a drive letter?),
or anything relevant in the dsm.opt or dsm.sys (other than the requisite
testflags if using an older OnTAP).  Or anything else you think is useful
that the documentation left out.

(Also of interest would be how you're scheduling your snapdiff backups,
and how you have that coexisting with local filesystems on the client
running the snapdiff backups.)

Thanks,
=Dave

--
Hello World.                                    David Bronder - Systems Admin
Segmentation Fault                                      ITS-EI, Univ. of Iowa
Core dumped, disk trashed, quota filled, soda warm.   david-bronder AT uiowa 
DOT edu