Replacing an HSD30, HS1CP, HSJ30/40, or HSZ40 Array Controller Write-back Cache Module Battery

This manual provides technical instructions for replacing the write-back cache module batteries for the HSD30, HS1CP, HSJ30/40, and HSZ40 array controllers. It outlines two primary procedures: a manual procedure for environments requiring complete system downtime and a C_SWAP procedure for dual-redundant configurations that allows for online replacement. The document includes safety precautions regarding electrostatic discharge (ESD) and high-energy batteries, a list of required tools, preparation steps for the subsystem, instructions for removing and installing modules, and post-installation verification and configuration steps.