Information Processing Systems - Data Interchange on 90 mm (3.5 in) Flexible Disk Cartridges Using Modified Frequency Modulation Recording at 15 916 ftprad, on 80 Tracks on Each Side - Part 1: Dimensional, Physical and Magnetic Characteristics
This part of ISO/IEC 9529 specifies the track layout, the track format and the characteristics of the recorded signals.
NOTE - Numeric values in the SI and/or Imperial measurement system in this part of ISO/IEC 9529 may have been rounded off and therefore are consistent with, but not exactly equal to, each other. Either system may be used, but the two should be neither intermixed nor reconverted. The original design was made using SI units.
