Information technology — Data recording format DD-1 for magnetic tape cassette conforming to IEC 1016

This International Standard specifies the media characteristics, the recorded tape format and file structure requirements to enable information interchange between information processing systems using 19,0 mm wide magnetic tape and cassette conforming to IEC 61016 Section 2.

Technologies de l'information — Format d'enregistrement des données DD-1 pour cassette à bande magnétique conforme à CEI 1016

General Information

Status
Published
Publication Date
31-Mar-1999
Current Stage
9093 - International Standard confirmed
Start Date
06-Jan-2005
Completion Date
21-Aug-2020
Ref Project

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ISO/IEC 14417:1999 - Information technology -- Data recording format DD-1 for magnetic tape cassette conforming to IEC 1016
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INTERNATIONAL ISO/IEC
STANDARD 14417
First edition
1999-03-15
Information technology — Data recording
format DD-1 for magnetic tape cassette
conforming to ISO/IEC 1016
Technologies de l'information — Format d'enregistrement des données
DD-1 pour cassette à bande magnétique conforme à l'ISO/CEI 1016
Reference number
B C
ISO/IEC 14417:1999(E)
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ISO/IEC 14417:1999(E)
Contents

1 Scope.....................................................................................................................................................................................................1

1.1 Purpose...............................................................................................................................................................................................1

2 Conformance .......................................................................................................................................................................................1

2.1 Magnetic tape cassettes......................................................................................................................................................................1

2.2 Generating systems ............................................................................................................................................................................1

2.3 Receiving systems..............................................................................................................................................................................1

3 Normative References ........................................................................................................................................................................1

4 Definitions............................................................................................................................................................................................1

4.1 Auxiliary data.....................................................................................................................................................................................1

4.2 Annotation record ..............................................................................................................................................................................2

4.3 Annotation tracks...............................................................................................................................................................................2

4.4 Average Signal Amplitude (ASA).....................................................................................................................................................2

4.5 azimuth...............................................................................................................................................................................................2

4.6 block...................................................................................................................................................................................................2

4.7 byte.....................................................................................................................................................................................................2

4.8 Codeword Digital Sum (CDS)...........................................................................................................................................................2

4.9 Data area ............................................................................................................................................................................................2

4.10 Data area reference line ...................................................................................................................................................................2

4.11 Data area reference point.................................................................................................................................................................2

4.12 Data field..........................................................................................................................................................................................2

4.13 Digital Sum Variation (DSV)..........................................................................................................................................................2

4.14 Dropout............................................................................................................................................................................................2

4.15 Erase.................................................................................................................................................................................................2

4.16 Erasing field.....................................................................................................................................................................................2

4.17 Equivalent reference edge................................................................................................................................................................2

4.18 flux transition spacing......................................................................................................................................................................3

4.19 Helical (data) record ........................................................................................................................................................................3

4.20 Helical track.....................................................................................................................................................................................3

4.21 Home track ID .................................................................................................................................................................................3

4.22 Inner code ........................................................................................................................................................................................3

4.23 Leader ..............................................................................................................................................................................................3

4.24 Logical volume ................................................................................................................................................................................3

4.25 magnetic tape ...................................................................................................................................................................................3

© ISO/IEC 1999

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or

mechanical, including photocopying and microfilm, without permission in writing from the publisher.

ISO/IEC Copyright Office • Case postale 56 • CH-1211 Genève 20 • Switzerland
Printed in Switzerland
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ISO/IEC
ISO/IEC 14417:1999(E)

4.26 Master Standard Reference Tape.....................................................................................................................................................3

4.27 Outer code........................................................................................................................................................................................3

4.28 physical recording density ...............................................................................................................................................................3

4.29 Postamble.........................................................................................................................................................................................3

4.30 Preamble...........................................................................................................................................................................................3

4.31 reference edge ..................................................................................................................................................................................3

4.32 reference field...................................................................................................................................................................................3

4.33 Resolution ........................................................................................................................................................................................3

4.34 Secondary Standard Reference Tape...............................................................................................................................................4

4.35 Sector................................................................................................................................................................................................4

4.36 Sector recording tolerance ...............................................................................................................................................................4

4.37 Standard Reference Amplitude........................................................................................................................................................4

4.38 Standard Reference Current.............................................................................................................................................................4

4.39 Sync pattern......................................................................................................................................................................................4

4.40 Tape mark ........................................................................................................................................................................................4

4.41 Tolerance zones ...............................................................................................................................................................................4

4.42 track..................................................................................................................................................................................................4

4.43 track angle ........................................................................................................................................................................................4

4.44 Track Set ..........................................................................................................................................................................................4

4.45 Track Set ID (TSID) ........................................................................................................................................................................4

4.46 Volume set .......................................................................................................................................................................................4

5 Conventions and notations.................................................................................................................................................................5

5.1 Representation of numbers.................................................................................................................................................................5

5.2 Names.................................................................................................................................................................................................5

5.3 Acronyms ...........................................................................................................................................................................................5

6 Environmental and safety ..................................................................................................................................................................6

6.1 Testing environment...........................................................................................................................................................................6

6.2 Operating environment ......................................................................................................................................................................6

6.3 Cassette conditioning .........................................................................................................................................................................6

6.4 Storage environment ..........................................................................................................................................................................6

6.5 Safety..................................................................................................................................................................................................6

7 Cassette.................................................................................................................................................................................................7

7.1 General description ............................................................................................................................................................................7

7.2 Dimensions.........................................................................................................................................................................................7

7.3 Identification holes.............................................................................................................................................................................7

8 Tape mechanical and electrical properties.......................................................................................................................................8

8.1 Materials.............................................................................................................................................................................................8

8.2 Tape width and tolerance...................................................................................................................................................................8

8.3 Delta width.........................................................................................................................................................................................8

8.4 Reference edge straightness...............................................................................................................................................................8

8.5 Tape thickness....................................................................................................................................................................................8

iii
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ISO/IEC
ISO/IEC 14417:1999(E)

8.6 Magnetic recording surface coating thickness...................................................................................................................................8

8.7 Tape length ........................................................................................................................................................................................8

8.8 Discontinuity......................................................................................................................................................................................9

8.9 Longitudinal curvature.......................................................................................................................................................................9

8.10 Out-of-plane distortions...................................................................................................................................................................9

8.11 Leaders, trailers and splices.............................................................................................................................................................9

8.12 Tape wind ........................................................................................................................................................................................9

8.13 Tensile yield force ...........................................................................................................................................................................9

8.14 Inhibitor tape....................................................................................................................................................................................9

8.15 Electrical resistance of the magnetic coating and back surface ....................................................................................................10

8.16 Layer-to-layer adhesion .................................................................................................................................................................11

8.17 Coating adhesion............................................................................................................................................................................12

8.18 Residual elongation........................................................................................................................................................................12

8.19 Tape cupping .................................................................................................................................................................................12

8.20 Light transmittance of the tape and the leader...............................................................................................................................13

9 Magnetic properties..........................................................................................................................................................................13

9.1 Magnetic coating..............................................................................................................................................................................13

9.2 Ease of erasure.................................................................................................................................................................................13

9.3 Average signal amplitude ................................................................................................................................................................13

9.4 Resolution ........................................................................................................................................................................................13

9.5 Typical field.....................................................................................................................................................................................13

9.6 Tape quality .....................................................................................................................................................................................13

10 Format for helical tracks ...............................................................................................................................................................14

10.1 General description of the write data path (figure 4) ....................................................................................................................14

10.2 Formation of a Logical Track Set..................................................................................................................................................16

10.3 Data structuring..............................................................................................................................................................................16

10.4 Track types.....................................................................................................................................................................................18

10.5 Subcode generation........................................................................................................................................................................23

10.6 Information processing ..................................................................................................................................................................24

10.7 Error protection of data..................................................................................................................................................................25

11 Formation of a sector .....................................................................................................................................................................32

11.1 Overview........................................................................................................................................................................................32

11.2 Sector details..................................................................................................................................................................................33

11.3 Recording method..........................................................................................................................................................................35

11.4 Record optimization.......................................................................................................................................................................35

11.5 Helical tracks .................................................................................................................................................................................35

11.6 Longitudinal tracks ........................................................................................................................................................................38

11.7 Recorded information....................................................................................................................................................................41

11.8 Write retry sequence......................................................................................................................................................................44

11.9 Append file operation ....................................................................................................................................................................45

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ISO/IEC
ISO/IEC 14417:1999(E)
Annexes

A Measurement of light transmittance ......................................................................................................................................46

B Tables.........................................................................................................................................................................................49

C Append file and file termination.............................................................................................................................................57

D Examples of subcode data fields in sequences of track type................................................................................................63

E Recommendations for transportation....................................................................................................................................65

F Error management systems.....................................................................................................................................................66

G Secondary reference tape user procedure .............................................................................................................................74

H Example of data record termination......................................................................................................................................76

I Physical to logical data structure mapping ...........................................................................................................................77

Bibliography .........................................................................................................................................................................................78

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ISO/IEC
ISO/IEC 14417:1999(E)
Foreword

ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the

specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the

development of International Standards through technical committees established by the respective organization to deal with

particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other

international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.

In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft

International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the national bodies casting a vote.

International Standard ISO/IEC 14417 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,

Subcommittee SC 11, Flexible magnetic media for digital data interchange.

Annexes A to C form an integral part of this International Standard. Annexes D to I are for information only.

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INTERNATIONAL STANDARD ISO/IEC ISO/IEC 14417:1999(E)
Information technology - Data recording format DD-1 for magnetic tape
cassette conforming to IEC 61016
1 Scope

This International Standard specifies the media characteristics, the recorded tape format and file structure requirements to

enable information interchange between information processing systems using 19,0 mm wide magnetic tape and cassette

conforming to IEC 61016 Section 2.
1.1 Purpose

The purpose of this International Standard is to define the format necessary to ensure information interchange at acceptable

performance levels.

The interchange parties complying with the applicable standards should be able to achieve compatibility without the need for

additional exchange of technical information.
2 Conformance
2.1 Magnetic tape cassettes

Each size / capacity of magnetic tape cassette shall be in conformance with this International Standard if it satisfies all mandatory

requirements of this International Standard and IEC 61016 Section Two. If both Standards specify the same subjects differently,

then this International Standard shall prevail. The tape requirements shall be satisfied throughout the extent of the tape.

2.2 Generating systems

A system generating a magnetic tape cassette for interchange shall be entitled to claim 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. If there is a choice, e.g. cassette size, at least one shall meet the mandatory requirements of this International

Standard.
2.3 Receiving systems

A system receiving a magnetic tape cassette for interchange shall be entitled to claim conformance with this International

Standard if it is able to handle any recording made on the tape according to 2.1. If there is a choice, e.g. tape thickness, at least

one shall meet the mandatory requirements of this International Standard.
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/IEC 646:1991, Information technology — ISO 7-bit coded character set for information interchange.

ISO 1001:1986, Information processing — File structure and labelling of magnetic tapes for information interchange.

IEC 61016, Helical-scan digital component video cassette recording system using 19 mm magnetic tape (format D-1),

Section 2 — Videotape cassette.
4 Definitions
4.1 Auxiliary data
Optional information of secondary importance.
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ISO/IEC
ISO/IEC 14417:1999(E)
4.2 Annotation record

The magnetization pattern or associated information recorded in the annotation track.

4.3 Annotation tracks
Two longitudinal tra
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