CONTENTS

  Title Page

  Copyright Page

  Preface

  1      Digital and SCSI

  1.1     Why Digital Selected SCSI

  1.2     Background

  1.3     Commitment to Open Systems

  2      Evaluating SCSI

  2.1     Development Considerations

  2.2     Systems with SCSI
    2.2.1      NCR 5380 SCSI Interface
    2.2.2      System Interface Interconnect (SII)

  2.3     Features Implemented

  2.4     Customer Support Services

  3      Understanding SCSI-An Overview

  3.1     The SCSI Bus

  3.2     SCSI Bus Phases

  3.3     SCSI Bus Signals

  3.4     SCSI Device Controllers

  3.5     The Common Command Set

  4      Operating System Support

  4.1     VMS SCSI Device Support
    4.1.1      VMS SCSI Third-Party Device Support Mechanisms
    4.1.2      SCSI Bus to IEEE488 Bus
      4.1.2.1      Planning Software Support for the IEEE488 Bus-Converter
      4.1.2.2      IEEE488 Bus-Converter Class Driver Interface Data Flow

  4.2     ULTRIX SCSI Device Support

  4.3     VAXELN SCSI Device Support
    4.3.1      VAXELN SCSI Third-Party Device Support Mechanisms
      4.3.1.1      Disk Device Class Driver
      4.3.1.2      Message Class Driver
      4.3.1.3      User-Written Class Driver

  A   Associated Documents

  Glossary
    ANSI . . . connect
    controller . . . open system
    peripheral device . . . SCSI port
    SII . . . target

  FIGURES

  3-1        SCSI Configuration

  3-2        Bus Phases for INQUIRY Command

  4-1        VMS SCSI Class/Port Interface

  4-2        Data Flow from User to IEEE488 Device

  TABLES

  2-1        Digital Systems and Associated Host Adapter

  2-2        Digital's Implementation of SCSI

  3-1        SCSI Bus Signals