There is no function/command set in TSM to merge data from two different nodes.
You can cheat and do it with export/import (convenient you are planning an 
export anyway). 
You will have to do it when there are no sessions active to either node:
Here are the steps; if you want the data to end up belonging to node2, both 
export/import runs have to be done with the name of node2:

On TSM 5.5:
Rename node2  nodetemp
rename node1 node2
export node2 to TSM 6.2 filedata=archive
rename node2 node1
rename nodetemp node2
export node2 to TSM 6.2 filedata=all merge=yes

Not sure what the resulting password will be on the 6.2 server, probably the 
password for node1 - check it after all done.  Also if these are Windows 
servers, think about what the resulting filespaces will look like - you could 
also rename the filespaces when you rename the nodenames if you want to get 
them merged as well.

If there is a lot of data involved, I'd suggest you test this first with a 
couple of tiny nodes, as a practice run, to make sure you are getting the 
results you want.

W 

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Dean Landry
Sent: Tuesday, September 27, 2011 9:48 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Merging nodedata

Hi All,

TSM 5.5

Nodename node1 (Archive data pre 2010)
Nodename node2 (Archive data post 2010)

Node1 and node2 are the same server, at some point the nodename was different 
causing two separate sets of archives.

What I want to do is merge these two together, so that all archive data is 
under the nodename node2.

I will then be doing server import/export to TSM 6.2

I have been over the forums and commands I would think would do it but I'm not 
getting anywhere, anybody have any ideas or suggestions?

Thanks,
Dean.