ANSI INCITS 73 : 1980 : R2017

1 Scope
2 Definitions
3 General Requirements
  3.1 Environment
  3.2 Materials
  3.3 Disk Cartridge Assembly
4 Physical Requirements
  4.1 Dimensions
  4.2 Torque
  4.3 Physical Properties of Coated Disk
  4.4 Disk Coating
  4.5 Magnetic Coating Resistivity
  4.6 Flammability
  4.7 Toxicity
5 Test Track Requirements
  5.1 Track Geometry
  5.2 Track Locations
  5.3 Physical Track Identification
  5.4 Index
6 Standard Reference Surfaces
  6.1 General
  6.2 Primary Standard Amplitude Reference Surface(s)
  6.3 Secondary Standard Amplitude Reference Surface(s)
7 Magnetic Characteristics
  7.1 Data Surfaces
  7.2 Signal Quality
Appendixes
Appendix A Optic System for Flexible Disk Light Transmittance
            Measurement
Appendix B Drop-Through Gage
Appendix C Abrasivity Evaluation
Appendix D Torque Test System

Describes the general, physical, and magnetic requirements for interchangeability of the single-sided flexible disk cartridge - for use at 6631 bits per radian (BPR) - as required to achieve unformatted disk cartridge interchange among disk drives and associated information processing systems.