HSG80 Array Controller ACS Version 8.2 User's Guide

This document is the DIGITAL StorageWorks HSG80 Array Controller ACS Version 8.0 User’s Guide (Part Number: EK-HSG80-UG.A01, January 1998).

It serves as a comprehensive manual for users to:

1. Understand the HSG80 Subsystem: Describes its major components (controllers, cache modules, external cache battery, etc.), key features, supported RAID levels (0, 1, 0+1, 3/5), cache capabilities (read, read-ahead, write-through, write-back caching), and fault-tolerance mechanisms.
2. Configure the Array Controller: Provides detailed procedures for initial setup, establishing local connections, configuring single or dual-redundant failover modes, setting port topologies, and connecting the subsystem to host systems.
3. Create and Manage Storagesets: Explains how to plan and implement various RAID configurations (Stripesets, Mirrorsets, RAIDsets, Striped Mirrorsets) to optimize for I/O performance, data availability, or both. It covers assigning unit numbers, mapping storagesets, partitioning disks, and managing various configuration switches.
4. Troubleshoot and Maintain: Offers a troubleshooting checklist, detailed tables for diagnosing issues, interpreting LED and event codes, and using diagnostic utilities like Fault Management Utility (FMU), Virtual Terminal Display Utility (VTDPY), and Disk Inline Exerciser (DILX) to identify and resolve problems.
5. Perform Replacement Procedures: Provides step-by-step instructions for replacing hardware modules such as controllers, cache modules, external cache batteries, GLMs, DIMMs, Fibre cables/hubs, and failed storageset members, emphasizing proper shutdown procedures.
6. Upgrade the Subsystem: Details processes for upgrading controller software (via new program cards or download), device firmware, converting to dual-redundant configurations, cloning data for backup, and saving/restoring subsystem configurations.

The document is designed to guide users through the practical aspects of managing the HSG80 Array Controller, providing commands, procedures, and reference information (including detailed CLI commands, LED codes, event codes, and controller specifications in its appendices). It specifically notes that it does not cover information about operating environments or detailed subsystem enclosure components, directing users to other documentation for those topics.