INCITS/ISO/IEC 13422 : 1994

Foreword
Introduction
1 Scope
2 Conformance
   2.1 Flexible Disk Cartridge
   2.2 Generating systems
   2.3 Receiving systems
3 Normative references
4 Definitions
   4.1 Average Signal Amplitude
   4.2 case
   4.3 data track
   4.4 Error Detecting Code
   4.5 Flexible Disk Cartridge
   4.6 flux transition frequency
   4.7 hub
   4.8 liner
   4.9 MFM recording mode
   4.10 Master Standard Reference Flexible Disk Cartridge
   4.11 peak value
   4.12 primary identification hole
   4.13 Reference Field
   4.14 Secondary Standard Reference Flexible Disk
         Cartridge
   4.15 secondary identification hole
   4.16 sector servo
   4.17 servo track
   4.18 shutter
   4.19 Standard Reference Amplitude
   4.20 Typical Field
   4.21 write-inhibit hole
5 Conventions and Notations
   5.1 Representation of numbers
   5.2 Acronyms
6 General description
   6.1 Drawings
   6.2 Main elements
   6.3 Description
   6.4 Marking of the Flexible Disk Cartridge
7 General requirements
   7.1 Environment and transportation
   7.2 Materials
8 Dimensional characteristics
   8.1 Case
   8.2 Liner
   8.3 Disk
   8.4 Hub
   8.5 Optional handling notches
   8.6 Interface between cartridge and drive
   8.7 Compliance
9 Physical characteristics
   9.1 Flammability
   9.2 Coefficient of linear thermal expansion of the disk
   9.3 Coefficient of linear hygroscopic expansion of the
         disk
   9.4 Torque
10 Magnetic characteristics
   10.1 Recording area
   10.2 Track geometry
   10.3 Functional testing
11 General requirements of the data track recording
   11.1 Method of recording
   11.2 Track location tolerance of the recorded Flexible
         Disk Cartridge
   11.3 Recording offset angle
   11.4 Density of recording
   11.5 Flux transition spacing
   11.6 Average Signal Amplitude
   11.7 Byte
   11.8 Sector
   11.9 Cylinder
   11.10 Cylinder number
   11.11 Data capacity of a track
   11.12 Special MFM recording signals
   11.13 Error Detecting Code
   11.14 Defective sector
12 Data track layout
   12.1 Index Gap
   12.2 Sector Identifier
   12.3 Identifier Gap
   12.4 Data Block
   12.5 Data Block Gap
13 General requirements of the servo track recording
   13.1 General
   13.2 Method of recording
   13.3 Servo track
   13.4 Average Signal Amplitude of Servo Data
   13.5 Fluctuation of signal amplitude of Servo Data
14 Servo track layout
   14.1 Deviation between the data track and the servo track
   14.2 Servo area timing
Annexes
A - Test for compliance
B - Measurement of light transmittance
C - Method for measuring the effective track width
D - Procedure and equipment for measuring flux transition
    spacing
E - Data separators for decoding MFM recording
F - EDC implementation
G - Cartridge distortion test gauge
H - Method of measuring peak shift
J - Servo track recording conditions
K - Method for measuring fluctuation of the Servo Data
    amplitude
L - Institute for the supply of Secondary Standard Reference
    Flexible Disk Cartridges

Describes the characteristics of 90 mm Flexible Disk Cartridges of 10 Mbyte formatted capacity, recorded at 33 157 ftprad using modified frequency modulation recording and sector servo tracking on 255 data tracks on each side.