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ISO/IEC 20919:2021

Information technology — Linear tape file system (LTFS) Format specification

Jul 27, 2021

General information

90.20     Jul 15, 2026

ISO/IEC

ISO/IEC JTC 1

International Standard

35.220.20  

English  

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Scope

This document defines the LTFS Format requirements for interchanged media that claims LTFS compliance. Those requirements are specified as the size and sequence of data blocks and file marks on the media, the content and form of special data constructs (the LTFS Label and LTFS Index), and the content of the partition labels and use of MAM parameters.
The data content (not the physical media) of the LTFS format shall be interchangeable among all data storage systems claiming conformance to this format. Physical media interchange is dependent on compatibility of physical media and the media access devices in use.
NOTE: This document does not contain instructions or tape command sequences to build the LTFS structure.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO/IEC 20919:2016

NOW

PUBLISHED
ISO/IEC 20919:2021
90.20 Standard under periodical review
Jul 15, 2026

Related project

Adopted from LTFS specification

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