Pre-Upgrade TasksPreparing for the Active Upgrade Process 2-11Figure 2-1. Windows Firewall ExceptionsRelated Topics• “Pre-Upgrade Tasks” on page 2-7• Configuring the Active Upgrade ProcessConfiguring a UPS-Protected System for the Active Upgrade ProcessIf your system is protected by a UPS, and you have configured the UPS powerconnections as specified in the Express5800/320Fc: Site Planning Guide, it is best toensure that the CPU- I ⁄ O enclosure with A-side, UPS-protected power (CPUenclosure 0, I/O enclosure 10) are Primary before starting the Active Upgradeprocess.When you initiate the upgrade process and split the system, the primary (active)CPU- I ⁄ O enclosure becomes the Production Side of the system. Because theProduction Side controls the upgrade session for most of the Active Upgrade process,and also contains the most current version of your data disks during the upgradeprocess, allowing the Production Side to run on UPS power provides better protectionfor your system should power fail during an upgrade.
