you can specify the mc on the command-line for backup node, but, all of your 
data gets rebound tot that MC, including all of the fulls.

You might tinker with using different node names for fulls and diffs, of make 
extra fulls for the basis of the diffs complementary to the fulls you want to 
retain for longer, using again separate node names.

all in all, NDMP is an awful mess. The industry could come up with a much 
better solution, but of course both EMC and NetApp prefer you to buying they 
filer to filer mirroring, snapshots and what not licenses and hardware to make 
backups over any tape solution that makes them no money at all.....

On 4 mei 2011, at 22:24, Prather, Wanda wrote:

> Have a customer where we have successfully configured and run NDMP full dumps 
> of an EMC NAS via TSM, to a storage pool with format=CELERRA (it's an EMC NAS 
> head).
> 
> Now the amount of data has grown so that we would like to run differentials 
> instead of fulls.
> Looks to me like there is no way to assign a different mgmt. class to NDMP 
> differentials than to fulls, is that correct?
> 
> Also, I found in the doc that these options are ignored in the backup copy 
> group definition:
> 
> Frequency
> Mode
> Retain Only Versions
> Serialization
> Versions Data Deleted
> 
> Does TSM know not to remove a differential NDMP backup if the full still 
> exists?
> 
> 
> Wanda Prather  |  Senior Technical Specialist  | wprather AT icfi DOT 
> com<mailto:wprather AT icfi DOT com>  |  www.jasi.com<www.jasi.com%20>
> ICF Jacob & Sundstrom  | 401 E. Pratt St, Suite 2214, Baltimore, MD 21202 | 
> 410.539.1135

-- 
Met vriendelijke groeten/Kind Regards,

Remco Post
r.post AT plcs DOT nl
+31 6 248 21 622