Installing an HSZ80 External Cache Battery

This document outlines the procedure for replacing an External Cache Battery (ECB) Storage Building Block (SBB) for the HSZ80 array controller. It covers two primary configurations:

• Dual-Redundant Controller Configuration: Describes how to disable failover, use the FRUTIL utility to manage the battery replacement process across controllers, and safely install and connect the new ECB.
• Single Controller Configuration: Details the shutdown procedure, power-off steps, and the installation of the replacement battery, including resetting the internal battery clock using FRUTIL.

Key safety instructions include not disconnecting the old ECB until the new one is fully charged (indicated by a continuously lit status LED) and handling the ECB cable carefully to avoid shorting the cache module. The document also provides specific command line examples for the necessary system operations.