Reference Guide

62 Upgrading to a Cluster Configuration
Completing the Upgrade
After installing the required hardware and network adapter upgrades, set up
and cable the system hardware.
NOTE: You may need to reconfigure your switch or storage groups so that both
nodes in the cluster can access their logical unit numbers (LUNs).
The final phase for upgrading to a cluster solution is to install and configure
Windows Server 2003 with MSCS.