Eric,

One way to migrate the clients from ADSM 3.1 to TSM 4.2 .
On the client, in the dsm.sys file, change the serveraddress 
that is pointing to the ADSM 3.1 to TSM 4.2 .

Since the system with TSM 4.2 is not aware of the client, when 
the client does its first backup to the TSM 4.2 it will be a 
full backup. Then the next backup will be incremental.

If you have a lot of clients, I would only have about 10-20 
clients pointing to the TSM 4.2, becuase if you point all the 
clients to the TSM 4.2 there is going to be a lot of network 
traffic.

If you want a file that is on the ADSM 3.1, just change the 
serveraddress back to the original ip address.

Over time the data on ADSM 3.1 will expire.

Also in the dsm.sys file I would make a note, something like 
this:
******************************
* If file can not be found
* change serveraddress to
* xxx.xxx.xxx.xxx
* ADSM 3.1
* Once restore is complete change 
* serveraddress back to 
* xxx.xxx.xxx.xxx
******************************

Its just a note to remind you that if you can't find the file,
the file could still be on the ADSM 3.1 .

Sias


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---- On    , Eric LANGUILLE (eric.languille AT ATOSORIGIN DOT COM) 
wrote:

> Thanks a lot for your informations, but there is still en 
question about
> this upgrade.
> 
> On my site, i have 2 servers, one in 3.1 , the other in 4.2. 
The question
> is : how do i do to migrate all my clients ADSM on the server 
4.2. The two
> servers  are operationnals.
> 
> If i migrate à client to TSM4.2, how do i do to restaure or 
retreive data
> which have been saved in ADSM 3.1?
> 
> Sincerlys
> 
> 
> 
> 
> "Dennis Glover" <dglover1 AT bellsouth DOT net> le 29/11/2002 
16:46:51
> 
> Pour :    Eric Languille/production/A-S@ELISA
> cc :
> 
> Objet :   Upgrade ADSM 3.1 to TSM 4.2
> 
> Sir,
> 
> I have performed the upgrade path you ask about in two
> environments, and there was no problem in either case.
> Your documentation will describe an "upgrade installation",
> including such important matters as ensuring you have
> copies of the volume usage and primary storage pool
> definitions files.  I would very strongly suggest that you
> download the latest "patch" or "maintenance" release
> of the TSM server and client software before you begin!
> 
> With some servers and clients you will find that the fully-
> qualified path name to the server and/or client software
> will have changed.  Please note that and make any
> required changes in your dsm.opt and/or dsm.sys
> files.  Also, when you upgrade your environment, please
> ensure the TSM server(s) are the first systems you do.
> That is because the 4.2 server will back up all previous
> releases of the client, including ADSM 3.1, but an ADSM
> 3.1 server is not guaranteed to back up a TSM 4.2 client.
> 
> If you are using certain tape libraries/drives, such as the
> IBM 3494 library with the IBM 3590 drives, please ensure
> you have the latest microcode installed to those devices.
> Otherwise, your backups will almost certainly fail as soon
> as the new server software is installed.
> 
> If I understand your question properly, I think you are asking
> if there are any special steps, such as "export" and "import"
> of backup data as part of the migration.  That is not at all a
> necessary step!  Simply upgrade your server, and then
> upgrade your clients, and the process is complete.
> 
> Good luck!
> 
> Dennis Glover
> 
> 
>