RF31 Integrated Storage Element User Guide

This document is the User Guide for the RF31 Integrated Storage Element (ISE), a half-height, 5-1/4 inch disk storage device designed with a Digital Storage Architecture (DSA) and Digital Storage System Interconnect (DSSI) bus interface. It provides comprehensive information for users and service personnel.

The guide covers:

1. General Information: Details the physical description, performance features (like multihost support and seek ordering), and specifications including data storage capacity (381 MBytes), seek times, power consumption, media characteristics, and environmental requirements.
2. Theory of Operation: Explains the internal workings, including its basic components (head-disk assembly, drive module), the functional description of its electronics (microprocessor, DSSI, buffer, spindle, actuator, R/W), data and command flow, firmware structure, MSCP server operations, and advanced features such as seek ordering, request fragmentation, read cache, RCT caching, and sector format. It also covers diagnostics and utilities like POST.
3. Controls and Indicators: Describes the operator control panels for BA200-Series and BA400-Series enclosures, including switches and LEDs, their functions, and how to assign DSSI Node IDs.
4. Local Programs: Outlines various diagnostic and utility programs accessible via VMS, console, or MDM, such as DIRECT, DRVEXR (drive exerciser), DRVTST (drive test), HISTR Y (history display), ERASE (data overwrite), VERIFY (disk check), DKUTIL (disk structures/data display), and PARAMS (parameter editing/display).
5. Troubleshooting Procedures: Provides guidance on self-tests, interpreting failure indications (LED states), and steps to take before contacting Digital Customer Services for common issues.
6. Digital Repair Services: Details the available service plans, including On-Site, Basic, DECservice, Carry-In, and Per Call services, and their coverage and turnaround times.