Hello. Sign In
Standards Store

Look Inside


86th Edition, 2002

Complete Document

Information Systems – One- or Two-Sided, Double-Density Unformatted, 5.25-Inch (130-mm), 96-tpi (3,8 tpmm), Flexible Disk Cartridge for 7958 bpr Use – General, Physical, and Magnetic Requirements

Includes all amendments and changes through Stabilization Notice (No longer revised / updated) , 2017

View Abstract
Product Details
Document History

Detail Summary

Active, Most Current

Price (USD)
Single User
In Stock
Add to Cart

Product Details:

Description / Abstract:

This standard specifies the general, physical, and magnetic requirements for interchangeability of the one- or two-sided, 5.25-inch (130.mm) (nominal), 96-tracks-per-inch (tpi) (3,8-tracks-per-millimeter (tpmm)) flexible disk cartridge (for 7958-bits-per-radian (bpr) use) as required to achieve unformatted disk cartridge interchange among disk drives using 80 tracks per side and associated information processing systems. The two-sided flexible disk cartridge enclosed in a protective envelope and having two recording surfaces is of the type intended specifically for use with digital recording and reproducing equipment employing access mechanisms capable of positioning to these data tracks.

There are three possible variations in the quantity of additional sector holes described in this standard. Version A utilizes no sector holes, only a single index hole; Version B utilizes 10 sector holes in addition to the index hole; and Version C utilizes 16 sector holes in addition to the index hole. These configurations are further described in 5 .1.3.3 and Figure 2. The existence and number of sector holes shall be specified by the user.


This standard defines the requirements and supporting test methods necessary to ensure interchange at acceptable performance levels. It is distinct from a specification in that it delineates a minimum of restrictions consistent with compatibility in interchange transactions.