ISO/IEC 14840:1996 PDF

Name: ISO/IEC 14840:1996 — Information technology — 12,65 mm wide magnetic tape cartridge for information interchange — Helical scan recording — Data-D3-1 format
SKU: ISO/IEC 14840:1996
Price: 25 EUR
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Information technology — 12,65 mm wide magnetic tape cartridge for information interchange — Helical scan recording — Data-D3-1 format

Название (английский):

ISO/IEC 14840:1996

Information technology — 12,65 mm wide magnetic tape cartridge for information interchange — Helical scan recording — Data-D3-1 format

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 105
Дата публикации:: 5 сентября 1996 г.
Издание:: ISO/IEC IS 14840 edition 1 version 1
ICS:: 35.220.23

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Описание (английский):

Describes the physical and magnetic characteristics of a magnetic tape cartridge, using magnetic tape 12,65 mm wide, so as to provide physical interchangeability of such cartridges. Specifies the quality of the recorded signals, the recording method and the recorded format.

Abstract

Похожие стандарты

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Overview

ISO/IEC 14840:1996 - Information technology - 12.65 mm wide magnetic tape cartridge for information interchange - Helical scan recording - Data‑D3‑1 format - defines the physical, magnetic and recording-format requirements needed for interoperable 12.65 mm magnetic tape cartridges. The standard specifies cartridge mechanical dimensions, unrecorded tape mechanical/magnetic characteristics, and the helical-scan Data‑D3‑1 recorded format (packets, scan groups, time code, servo and track geometry) so that cartridges can be exchanged and read between compliant drives.

Key facts:

Media: 12.65 mm (approx. 1/2 in) magnetic tape cartridge

Defined cartridge Types: Type A (≈91 m, 10 GB), Type B (≈204 m, 25 GB), Type C (≈392 m, 50 GB)

Recording: Helical scan, includes packet/scan-group layout, CRC/ECC protection and servo/time-code tracks

Key topics and technical requirements

The standard covers both physical and logical layers for reliable interchange:

Cartridge mechanical specs - case dimensions, leader block, reel hub, write‑protect, notches and label areas to ensure physical interchangeability.

Unrecorded tape properties - tape width/length, thickness, curvature, surface roughness, adhesion and tensile strength requirements.

Magnetic recording characteristics - signal amplitude, resolution, narrow-band SNR, ease of erasure, missing-pulse metrics and test conditions.

Track geometry & recording method - helical track width, pitch, azimuth angles, bit-cell length, bit shift, and long/short-term density definitions.

Format & error control - Packet format, Packet ID (including algorithm registration), Packet Trailer, Scan Group structure, Helical Time Code (HTC), CRC characters and layered ECC (inner/outer).

Servo and Time Code tracks - layout, polarity, read amplitude and quality criteria for track following and addressing.

Conformance rules - compliance requires meeting specified clauses for cartridge (clauses 4, 7–10), recording (clauses 11–16) and including registered algorithm identification when used.

Applications and who uses ISO/IEC 14840

Tape drive and media manufacturers implementing compliant 12.65 mm helical-scan products for cross-vendor interchange.

Data center and archival managers ensuring long-term, portable backups and migrations across systems.

Software and firmware developers for tape controllers, formatters and error‑correction implementations.

Test labs and quality assurance organizations validating media and drives to the standard’s mechanical, magnetic and signal-performance tests. Practical uses include standardized backups, archival exchange between institutions and vendor-neutral data migration.

Conformance & related standards

Claims of conformance must state cartridge Type and implemented registered algorithms (registration per ISO/IEC 11576:1994).

Normative references in ISO/IEC 14840 include standards for material tests and safety (e.g., ISO/R 527, ISO 1302, ISO 683‑13, IEC 950).

Annexes provide measurement procedures, handling/transportation guidance and CRC/ECC generation details for implementation and testing.

Keywords: ISO/IEC 14840:1996, 12.65 mm magnetic tape, magnetic tape cartridge, helical scan recording, Data‑D3‑1 format, tape interchange, packet format, ECC, CRC, tape drive conformity.

ISO/IEC 14840:1996 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses ISO/IEC 14840

Conformance & related standards

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