ANSI INCITS 451 : 2008(R2018)

Foreword
Introduction
1 Scope
  1.1 Introduction
  1.2 Requirements precedence
  1.3 ATA family of standards
2 Normative References
  2.1 General Information
  2.2 Approved normative references
  2.3 Normative references under development
  2.4 Other references
3 Definitions, symbols, abbreviations, and conventions
  3.1 Definitions
  3.2 Symbols
  3.3 Abbreviations
  3.4 Keywords
  3.5 Conventions
4 ATA architecture model
  4.1 Introduction
  4.2 ATA structural model
  4.3 ATA architecture layering
  4.4 The ATA client-server model
  4.5 The ATA distributed service model
5 ATA protocol model
  5.1 ATA protocol introduction
  5.2 Power-on, nexus loss, and device management protocols
  5.3 Command protocols

Describes a reference model that defines common behaviors for ATA hosts and devices and an abstract structure that is generic to all ATA I/O system implementations.