ANSI ISO IEC-22051-2002 pdf download Information technology — Data interchange on 12,7 mm, 448-track magnetic tape cartridges — SDLT1 format
1 Scope This International Standard specifies the physical and magnetic characteristics of a 12,7 mm wide, 448-track magnetic tape cartridge, to enable physical interchangeability of such cartridges between drives. It also specifies the quality of the recorded signals, a format – called Super Digital Linear Tape 1 (SDLT 1) – and a recording method, thereby allowing data interchange between drives. Together with a labelling standard, for instance ISO 1001 for Magnetic Tape Labelling, it allows full data interchange by means of such magnetic tape cartridges.
2 Conformance
2.1 Magnetic tape cartridges A magnetic tape cartridge shall be in conformance with this International Standard if it satisfies all mandatory requirements of this International Standard. The tape requirements shall be satisfied throughout the extent of the tape. 2.2 Generating systems A system generating a magnetic tape cartridge for interchange shall be in conformance with this International Standard if all the recordings that it makes on a tape according to 2.1 meet the mandatory requirements of this International Standard.
In addition, a claim of conformance shall state
− whether or not one, or more registered algorithm(s) are implemented within the system,
− the registered identification number(s) of the implemented compression algorithm(s).
2.3 Receiving systems
A system receiving a magnetic tape cartridge for interchange shall be in conformance with this International Standard if it is able to handle any recording made on a tape according to 2.1.
In addition, a claim of conformance shall state
− whether or not one, or more de-compression algorithm(s) are implemented within the system, and are able to be applied to de-compress data prior to making such data available to the host,
− the registered identification number(s) of the implemented compression algorithm(s).
3 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.
ISO 1001:1986, Information processing — File structure and labelling of magnetic tapes for information interchange
ISO 1302:2002, Geometrical Product Specifications (GPS) — Indication of surface texture in technical product documentation
ISO/IEC 11576:1994, Information technology — Procedure for the registration of algorithms for the lossless compression of data
4 Terms and definitions
For the purpose of this International Standard, the following terms and definitions apply.
4.1 back surface
The surface of the tape opposite the magnetic coating which is used to record data.
4.2 Beginning-Of-Tape marker (BOT)
A hole punched on the centreline of the tape towards the end nearest to the leader.