ANSI INCITS 126 : 1986 : R2017

1 Scope, Purpose and Application
  1.1 Scope
  1.2 Purpose
  1.3 Application
2 Referenced Standards
  2.1 American National Standards
  2.2 Other Standards
3 Definitions
4 General Requirements
  4.1 Environment
  4.2 Materials
  4.3 Disk Cartridge Assembly
5 Physical Requirements
  5.1 Dimensions
  5.2 Torque
  5.3 Physical Properties of the Coated Disk
  5.4 Disk Coating
  5.5 Magnetic Coating Resistivity
  5.6 Flammability
  5.7 Toxicity
6 Test Track Requirements (Track and Recording Information)
  6.1 Number
  6.2 Width
  6.3 Location
  6.4 Physical Identification
  6.5 Index
7 Reference Surfaces
8 Magnetic Characteristics
  8.1 Data Surfaces
  8.2 Signal Quality
Appendixes
Appendix A Optic System for Light-Transmittance Measurement of
            Flexible Disk
Figure A1 Optic System for Light-Transmittance Measurement of
            Flexible Disk
Appendix B Drop-Thru Test Gauge
Figure B1 Drop-Thru Test Gauge
Appendix C Abrasivity Evaluation
            C1. Comparative Disk
            C2. Wear Test Disk
            C3. Wear Revolution
            C4. Test Procedure

Describes the general, physical, and magnetic requirements for interchangeability of the one- or two-sided, 5.25 inch (130 mm) (nominal), 96 tracks-per-inch (tpi) (3.8 tracks-per-millimeter (tpmm)) flexible disk cartridge (for 7958 bits-per-radian (bpr) use) as required to achieve unformatted disk cartridge interchange among disk drives using 80 tracks per side and associated information processing systems.