ESE50 SDI Solid State Disk User Guide

This document is the ESE50 SDI Solid State Disk User Guide, published by Digital Equipment Corporation in June 1993.

The ESE50 is a high-performance, low-latency solid state mass storage device utilizing DRAM, part of Digital's Storage Architecture/Standard Disk Interconnect (DSA/SDI) family. It is plug-compatible with DSA/SDI controllers (like HSC and KDM70), supports capacities from 120MB to 1GB, and offers rapid access (0.25ms) and transfer rates (20.0 MB/s). It features dual-port capability, modular hardware, and extensive drive-resident diagnostics.

A key feature is its integrated data retention system, which transfers data to an internal SCSI Winchester disk using battery power upon AC power loss, ensuring nonvolatility. However, this system does not activate when the main AC power switch is manually turned off, and users are strongly advised to maintain separate data backup procedures. Orderly shutdown procedures are outlined to properly utilize this retention.

The guide is structured into several sections:

• Introduction: Provides an overview of the ESE50's characteristics, specifications (including physical, electrical, and environmental), and critical user precautions, such as maintaining operating temperature ranges and mandatory electrostatic discharge (ESD) protection during handling.
• Installation: Covers site preparation (e.g., mandatory 24-hour thermal stabilization, floor loading, environmental requirements) and unpacking procedures. It emphasizes that installation, cabling, and servicing must be performed only by trained Digital Customer Services engineers due to the presence of hazardous voltages and the complexity of the procedures.
• Operating Instructions: Details the functions of the Operator Control Panel (OCP) for monitoring status, running power-up diagnostics, programming the drive unit address, and selecting various operating modes (Normal, Fault Display, and Test Mode).
• Diagnostics: Explains the different types of drive-resident diagnostics (power-up, patrol, and OCP-selectable) and how to run them.
• Customer Equipment Maintenance: Outlines customer responsibilities for routine equipment care, including cleaning guidelines (exterior, air vents) and maintaining environmental conditions, along with a maintenance log.

In summary, the document serves as a comprehensive manual for understanding, installing (by qualified personnel), operating, and maintaining the ESE50 Solid State Disk, with a strong focus on safety, data integrity, and proper system management.