Mark,

Don't know anything about clustering master servers, I'll put in my two cents 
worth on the master server migration.

Since you're going to a *nix to a *nix environment, you should be able to 
simply do a disaster recovery type restore of NetBackup.  The process is pretty 
much like this:  install NBU from scratch on the new server, configure it 
enough to get a library or tape drive working and then do a full catalog 
restore.  Since the EMM database backup is simply a dump of the data, the 
restore process will over come any binary level data differences that might 
exist between the two flavors of UNIX.  And the images catalog is still the 
same format of flat and binary files in a nested directory structure.

The only gotcha I can see here is the host name.  You'll need to setup the new 
server with the exact same host name which means isolating it from your regular 
network.

I'd be curious to see how this works for you.  I'm actually considering the 
same thing (going from an AIX environment to Linux).

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