Technical data

3–1
Compaq HSZ80 Array Controller ACS Version 8.3 Maintenance and Service Guide
Chapter 3
Upgrading the Subsystem
This chapter provides instructions for upgrading the controller software, installing
software patches, upgrading firmware on a device, upgrading from a single-controller
configuration to a dual-redundant controller configuration, and upgrading cache
memory.
Required Tools
You will need the following tools to service the controller, cache module, and the
external cache battery (ECB):
■ An antistatic wrist strap.
■ An antistatic mat on which to place modules during upgrading.
■ A Storage Building Block (SBB) Extractor for removing StorageWorks building
blocks. This tool is not required, but it will enable you to perform more
efficiently.
Electrostatic Discharge
Electrostatic discharge (ESD) is a common problem and may cause data loss, system
down time, and other problems. The most common source of static electricity is the
movement of people in contact with carpets and clothing. Low humidity also
increases the amount of static electricity. You must discharge all static electricity
prior to touching electronic equipment. Follow the precautions in the “Electrostatic
Discharge Precautions” given in the Preface whenever you are installing any
component.