About this document
This document provides instructions for installing and customizing the configuration
of your IBM System Storage DS5020 storage subsystem. It also provides
maintenance procedures and troubleshooting information.

Who should read this document

This document is intended for system operators and service technicians who have
extensive knowledge of Fibre Channel and network technology.

How this document is organized

Chapter 1, “Introduction,” on page 1 describes the IBM System Storage DS5020
storage subsystem. This chapter includes an inventory checklist and an overview of
the storage subsystem features, operating specifications, and components.
Chapter 2, “Installing the storage subsystem,” on page 27 contains information
about how to install the DS5020 storage subsystem in a standard rack cabinet and
setting the interface options.
Chapter 3, “Cabling the storage subsystem,” on page 45 contains Fibre Channel
and power cabling information for the DS5020 storage subsystem.
Chapter 4, “Operating the storage subsystem,” on page 93 contains information
about how to turn the power to the DS5020 storage subsystem on and off, recover
from an overheated power supply and fan unit, troubleshoot, and interpret LEDs.
Chapter 5, “Replacing components,” on page 121 contains step-by-step instructions
about how to install or remove customer replaceable units (CRUs), such as
Enhanced Disk Drive Modules (E-DDMs), power supply and fan units, RAID
controllers, battery units, midplane, and Small Form-factor Pluggable transceiver
(SFP) modules.
Chapter 6, “Hardware maintenance,” on page 153 describes problems and
symptoms that are specific to the DS5020 storage subsystem. It also provides a
parts list for the DS5020 storage subsystem.
Appendix A, “Records,” on page 163 provides a table that you can use to record
and update important information about your DS5020 storage subsystem, including
serial number and device records.
Appendix B, “Rack mounting templates,” on page 167 provides the rack mounting
templates for installation of the DS5020 storage subsystem. If you want to tear out
the templates from the document for use during installation, use these copies of the
templates.
Appendix D, “Power cords,” on page 179 lists power cord information for the
DS5020 storage subsystem.
Appendix E, “Additional DS5020 documentation,” on page 183 lists additional
DS5020 documents.
Appendix F,“Accessibility,” on page 195 details accessibility information.
© Copyright IBM Corp. 2009 xix