Another way is to move your TSM Instance and DB to new 64bit system then 
upgrade your TSM binaries to 64bit.
Here's roughly what we did to go from and H70 to a p630

On Existing H70 Upgrade OS from AIX 4.3.3 to 5.2
Build new p630
Did a sysback on H70 
Physically moved SSA Drawer with our TSM DB Vols from H70 to p630
Restored Sysback to p630 (Have AIX 5.x CD ready for p630 driver filesets)

Started system up
Redefined Tape Drives and Paths to TSM
Disk Stgpool were on SAN so just had to move HBA's or Zone SAN disk to New 
HBA...
After a couple weeks when all was running for awhile then we upgraded TSM 
fileset Binaries from 32 to 64bit...
Our AIX admin would have more details.

If you're just upgrading OS our AIX admin split the mirrored root vols, 
upgraded from 4.33 to 5.2 on one of the volumes while we ran on the other vol 
with 4.33. 

Once he was done with the upgrade he'd change the boot order to the 5.2 vol and 
we ran TSM 32bit on AIX 5.2 64bit for a bout a week till we were comfortable, 
then the admin re-mirrored the root vols and we upgraded TSM to 64bit a week or 
so after that.

Hope this helps.





-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
Richard Sims
Sent: Monday, February 14, 2005 7:32 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: TSM5.1 32bit to TSM5.164bit Migration


On Feb 14, 2005, at 8:23 AM, Purushotham, Vivek wrote:

> I have some inputs on the migrating TSM51 from a 32bit OS (AIX 433) to
> TSM51
> 64bit OS (AIX 53).
> I have a doubt , if the Data would be correctly migrated accross this
> dissimiliar architecture.
>
> I have installed the binaries in 64bit on a new box , Just wanted some
> more
> clarity before proceeding.

Hi, Vivek -

For what it's worth, I performed a DB Restore type migration from
32-bit AIX 4.1 ADSM 3.1 to 64-bit AIX 5.2 TSM 5.2 with fine results: a
testament to the level of programming in the server. As you intimate,
determining how far you can "push" the restoral approach is undefined,
and so there is no certainty of outcome. But I hope this helps you.

    Richard Sims     http://people.bu.edu/rbs