RA8000 and ESA12000 Storage Subsystems User's Guide

This document is a User's Guide for the Compaq RA8000 and ESA12000 Storage Subsystems, providing comprehensive information on their product description, installation, configuration, error analysis, and component replacement.

Key aspects covered include:

1. Product Description: Details the modular design built around the BA370 rack-mountable enclosure, outlining major components such as Array Controllers (HSG80/HSZ80), Storage Building Blocks (SBBs) for disk drives and power supplies, Environmental Monitor Units (EMU), Power Verification and Addressing (PVA) modules, External Cache Batteries (ECB), I/O modules, and cooling systems. It highlights features like redundant power, hot-swappable components, and expandability.
2. Installation: Provides step-by-step instructions for site preparation, physically installing the RA8000 and ESA12000 cabinets (including joining multiple units), and installing internal components like disk drives, power supplies, and ECBs. It also covers cabling procedures for SCSI buses and EMU communications, and setting PVA addresses.
3. Configuration: Explains how to set up the EMU, including configuring its communication bus, temperature sensors, blower speed control, and alarm functions. It also details rules and restrictions for setting PVA SCSI addresses.
4. Error Analysis and Fault Isolation: Describes the system's error reporting mechanisms, primarily through various LEDs (System OK, Fault, EMU, SBBs, power supplies, I/O modules) and audible alarms. It provides a detailed breakdown of EMU fault codes, their causes, and recommended corrective actions, along with procedures for controlled subsystem shutdowns.
5. Component Replacement: Offers detailed procedures for removing and installing Field Replaceable Units (FRUs), including array controllers, cache modules, ECBs, disk drive SBBs, power supply SBBs, enclosure blowers, AC input power entry controllers, EMUs, and PVAs. It specifies different swap methods (hot, warm, cold) and outlines necessary precautions and tools. A complete FRU parts list is also included.

The guide is intended for users responsible for installing, configuring, and repairing these storage subsystems.