ISO 3561-1976 rus PDF

Full title and description

ISO 3561:1976 — Information processing — Interchangeable magnetic six-disk pack — Track format. Specifies the track format characteristics for an interchangeable six-disk magnetic pack intended for data interchange, including character-set conventions and references to related media standards.

Abstract

This International Standard defines the physical and logical track-format characteristics for the six-disk pack used for interchange of recorded data (see ISO 2864). The 7‑bit coded character set of ISO 646 is adopted for recorded characters, with optional agreement between interchange parties to use 7‑ or 8‑bit extensions as specified in ISO 2022.

General information

• Status: Withdrawn (withdrawal proposed/recorded by ISO/IEC committee and reflected in distributor records).
• Publication date: June 1976 (Edition 1, 1976).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 35.220.21 (Magnetic disks).
• Edition / version: Edition 1 (1976).
• Number of pages: 9 (technical content length recorded in ISO catalogue entries; some distributor catalogs list 10 pages).

Scope

Defines the track layout and recording conventions for the interchangeable six-disk magnetic pack to ensure compatible data interchange between systems. The standard addresses track and sector organization, allowable character coding (reference to ISO 646 and ISO 2022), and cross-references ISO 2864 for media characteristics. It is focused on interchange format rather than device mechanical specifications.

Key topics and requirements

• Track and sector format definitions for six-disk packs (logical track layout and designation).
• Adoption of ISO 646 7‑bit coded character set for recorded characters; option to use ISO 2022 extensions by agreement.
• Compatibility requirements intended to support data interchange between different equipment and vendors.
• Cross-reference to ISO 2864 for media- and pack-related characteristics and handling.
• Normative conventions for data-block and sector structure to support reliable read/write interchange.

Typical use and users

This standard was intended for computer manufacturers, data-center operators, archival and interchange service providers, and systems integrators who needed a common track format for removable six-disk magnetic packs. Typical uses included exchange of bulk datasets between heterogeneous mainframe and minicomputer systems and establishment of production/backup interchange media.

Related standards

Key related documents include ISO 2864 (media characteristics and interchange requirements for disk packs), ISO 646 (7‑bit coded character set), and ISO 2022 (escape-sequence based character-set extension mechanisms). The standard was produced under ISO/IEC JTC 1 (SC 23) activity on digitally recorded media.

Keywords

interchangeable disk pack; six-disk pack; magnetic disk; track format; sector format; ISO 646; ISO 2022; data interchange; digitally recorded media.

FAQ

Q: What is this standard?

A: ISO 3561:1976 is an ISO International Standard that defined the track-format characteristics for an interchangeable six-disk magnetic pack used for data interchange.

Q: What does it cover?

A: It covers logical track and sector layout, character-coding conventions (adoption of ISO 646 and optional ISO 2022 extensions), and references to media characteristics (ISO 2864) to support interchangeability.

Q: Who typically uses it?

A: Historically, computer manufacturers, data-center and archive operators, systems integrators, and other organizations exchanging bulk data on interchangeable magnetic disk packs. In practice usage has declined with newer media technologies.

Q: Is it current or superseded?

A: The standard has been withdrawn in the ISO lifecycle (withdrawal actions and distributor catalogs record withdrawal activity, with distributor entries noting withdrawal dates). It is not an active current ISO standard for new implementations.

Q: Is it part of a series?

A: It sits with other ISO documents addressing magnetic media and information interchange (for example ISO 2864 for pack media characteristics) and was developed under ISO/IEC JTC 1 technical work on recorded media (SC 23).

Q: What are the key keywords?

A: Interchangeable six-disk pack; magnetic disk; track format; sector; ISO 646; ISO 2022; data interchange.