Information processing — Magnetic disk for data storage devices — 158 000 flux transitions per track, 210 mm(8.3 in) outer diameter, 100 mm(3.9 in) inner diameter

This technical specification establishes the dimensional and performance requirements for magnetic disk storage devices with an outer diameter of 210 millimeters and an inner diameter of 100 millimeters. It specifically defines the criteria for recording densities where 158,000 magnetic transitions are arranged per track. The document outlines the necessary physical tolerances, media characteristics, and interface specifications to ensure compatibility and interchangeability within the information processing industry. By adhering to these parameters, manufacturers can produce storage components that meet consistent quality benchmarks for data retention and mechanical reliability. The standard serves as a reference for engineering design and testing procedures, focusing on the geometric properties and magnetic flux characteristics essential for the operation of such disk drives. It facilitates the alignment of production processes with established industry norms, ensuring that storage solutions function effectively in various computing environments without requiring proprietary modifications. The guidelines provided cover the fundamental attributes required for successful implementation of this specific disk format in data storage systems.