BA654 DSSI Disk PIU Installation Guide

This document is the BA654 DSSI Disk PIU Installation Guide (Order Number EK-BA654-IN.001), published by Digital Equipment Corporation in December 1992.

Purpose: It provides comprehensive instructions for Digital customer service engineers and self-maintenance customers to install the BA654 DSSI Disk PIU (Processor Interface Unit) option into H9F00- Ax system cabinets or H9F00- Bx expander cabinets to provide additional I/O.

Key Content Areas:

1. Preparation: Describes the BA654 DSSI Disk PIU, outlines the necessary area, kit contents, tools, and emphasizes checking the PIU enclosure for proper airflow.
2. Installation: Details the steps for removing cabinet airflow plates, installing the BA654 PIU, inserting and cabling the Storage Array Building Blocks (SBBs), and setting node IDs.
3. Acceptance and Troubleshooting: Guides users on restoring power, checking self-test results, testing the KFMSx adapter and associated DSSI devices, and interpreting DSSI Disk Drive LEDs for fault diagnosis.

The guide notes that the I/O adapter (KFMSx), Storage Array Building Blocks (SBBs), and DSSI cables must be ordered separately.