Installing an HSZ80 Cache Module

This document outlines the procedures for replacing a cache module for the HSZ80 array controller. It covers two primary configuration scenarios:

• Dual-Redundant Controller Configuration: Step-by-step instructions for removing the old module and installing a new one using the FRUTIL utility, including commands for disabling and re-enabling failover.
• Single Controller Configuration: Procedures for taking the controller offline, shutting it down, and physically replacing the cache module.

The guide emphasizes safety precautions, specifically regarding electrostatic discharge (ESD) and the proper disabling of the external cache battery (ECB) before disconnection to prevent short circuits.