Corrigendum 1 - Information processing - Data interchange on 130 mm (5.25 in) flexible disk cartridges using modified frequency modulation recording at 13 262 ftprad, on 80 tracks on each side - Part 2: Track format A for 77 tracks

This document constitutes the first correction to an international standard concerning data exchange using Modified Frequency Modulation recording on 130 millimeter floppy disk cartridges. Specifically, it addresses the technical formatting for media operating with 80 tracks per side at a density of 13,262 feet per radial inch, focusing on the configuration for 77 tracks. The content was finalized and made effective in 1992 by the global standards body responsible for developing voluntary consensus standards. This corrigendum provides necessary amendments to the original specifications established in 1987, ensuring data integrity and compatibility across compatible storage systems. It outlines precise geometric and logical parameters for the magnetic tracks, including sector definitions and synchronization patterns required for successful read and write operations. By clarifying these details, the document serves as an essential reference for manufacturers and users of optical and magnetic media storage devices designed for this specific format. It ensures that all implementations adhere to the corrected technical guidelines, thereby preventing interoperability issues between different hardware and software environments utilizing this particular disk cartridge standard.