The best approach must be: 

1) Be sure that your ACSLS is in a clustered environment, cause its is
going to be a critical service for whole operation to work
2) Upgrade all your media servers to 6.5.3 (site A)

You can follow 2 ways: 

1) Make your Site A Master Server a Media server and make all media
servers for Site B Master Server (You might cluster Site B Master
Server)

2) Partition ACSLS and make a pool for Site A and Site B. Manual
operation must be required for tape assignment between pools

Don't forget to provision according to your requirements SAN zoning,
tape assignment, licensing and LAN connectivity prior to Netbackup
upgrade/config


Message: 4
Date: Wed, 18 Mar 2009 11:11:45 -0400
From: <Anil.Maurya AT sanofi-aventis DOT com>
Subject: [Veritas-bu] What is best approach to share one ACSLS library
        ?
To: <veritas-bu AT mailman.eng.auburn DOT edu>
Message-ID:
        <[email protected]>
Content-Type: text/plain;       charset="us-ascii"

 
Hi
I have one big library ( 8500 ) controlled by ACSLS. We have two site
site A ( one master and many media server all running on 5.5.x have
small library ( DLT)(NO ACSLS here) ) and site B ( one master and many
media server all running 6.5.3 with big library 8500 on ACSLS ).
        I need to start using big 8500 library for both site. What is
best approach and how should i acheive this goal ?

THX




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