Information processing; data interchange on 130 mm (5.25 in) flexible disk cartridges using modified frequency modulation recording at 7958 ftprad, 1,9 tpmm (48 tpi), on both sides; part 1: dimensional, physical and magnetic characteristics (ISO 7487-1, 1

This technical specification addresses the standardization of data exchange on 130mm (5.25 inch) flexible disk storage systems using an improved frequency modulation recording technique. It defines the essential dimensions, physical properties, and magnetic performance characteristics required for interoperability between different devices. The document outlines specific parameters for a double-sided recording mode with a density of approximately 48 tracks per inch, operating at a linear density of roughly 7958 feet per inch. These technical requirements ensure that data can be reliably read and written across various storage units from different manufacturers. The scope covers the structural integrity of the disk medium and the magnetic consistency needed for successful data transmission. By adhering to these defined specifications, systems can achieve consistent performance without compatibility issues. This framework establishes the baseline for the physical layer of the storage interface, facilitating seamless data transfer in environments where such media is utilized. It serves as a foundational reference for the engineering of compatible hardware and the validation of storage products within the relevant market sector.