ISO-22051-2002.pdf

Reference number ISO/IEC 22051:2002(E) © ISO/IEC 2002 INTERNATIONAL STANDARD ISO/IEC 22051 First edition 2002-10-01 Information technology Data interchange on 12,7 mm, 448-track magnetic tape cartridges SDLT1 format Technologies de l'information Échange de données sur cartouche à bande magnétique 12,7 mm, 448 pistes Format SDLT1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 00:54:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 22051:2002(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. © ISO/IEC 2002 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 either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii © ISO/IEC 2002 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 00:54:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 22051:2002(E) © ISO/IEC 2002 All rights reserved iii Contents 1 Scope 1 2 Conformance 1 2.1 Magnetic tape cartridges 1 2.2 Generating systems 1 2.3 Receiving systems 1 3 Normative references 1 4 Terms and definitions 1 4.1 back surface 1 4.2 Beginning-Of-Tape marker (BOT) 1 4.3 block 2 4.4 byte 2 4.5 cartridge 2 4.6 Cyclic Redundancy Check (CRC) character 2 4.7 Error-Detecting Code (EDC) 2 4.8 End-Of-Tape marker (EOT) 2 4.9 Entity 2 4.10 Error-Correcting Code (ECC) 2 4.11 Envelope 2 4.12 Envelope size 2 4.13 flux transition position 2 4.14 flux transition spacing 2 4.15 logical track 2 4.16 magnetic tape 2 4.17 Master Standard Reference Tape 2 4.18 object 2 4.19 page 2 4.20 recording density 2 4.21 physical track 2 4.22 Record 3 4.23 Reference Edge 3 4.24 Reference Field 3 4.25 Secondary Standard Reference Tape 3 4.26 Standard Reference Amplitude (SRA) 3 4.27 Standard Reference Current 3 4.28 Test Recording Current 3 4.29 Typical Field 3 5 Conventions and notations 3 5.1 Representation of numbers 3 5.2 Dimensions 3 5.3 Names 3 5.4 Acronyms 3 6 Environment and safety 4 6.1 Cartridge and tape testing environment 4 6.2 Cartridge operating environment 4 6.3 Cartridge storage environment 4 6.4 Safety 4 6.5 Flammability 4 6.6 Transportation 4 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 00:54:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 22051:2002(E) iv © ISO/IEC 2002 All rights reserved Section 2 - Requirements for the unrecorded tape 5 7 Mechanical and electrical requirements 5 7.1 Material 5 7.2 Tape length 5 7.3 Tape width 5 7.4 Tape thickness 5 7.5 Discontinuity 5 7.6 Longitudinal curvature 5 7.6.1 Requirements 5 7.6.2 Procedure 5 7.7 Out-of-Plane distortions 5 7.8 Cupping 5 7.9 Roughness of the coating surfaces 6 7.9.1 Roughness of the back coating surface 6 7.9.2 Roughness of the magnetic coating surface 6 7.10 Coating adhesion 6 7.11 Layer-to-layer adhesion 6 7.11.1 Requirements 6 7.11.2 Procedure 6 7.12 Modulus of elasticity 7 7.12.1 Requirement 7 7.12.2 Procedure 7 7.13 Flexural rigidity 8 7.13.1 Requirement 8 7.13.2 Procedure 8 7.14 Tensile yield force 8 7.14.1 Procedure 8 7.15 Electrical resistance 8 7.15.1 Requirement 8 7.15.2 Procedure 8 7.16 Inhibitor tape 9 7.17 Light transmittance of the tape and the leader 9 7.18 Abrasivity 9 7.19 Coefficient of dynamic friction 9 7.19.1 Requirements 9 7.19.2 Procedure for the measurement of the friction between the magnetic surface and the back surface 9 7.19.3 Procedure for the measurement of the friction between the magnetic surface or the back surface and calcium titanate ceramic 10 7.20 Servo 10 7.20.1 Servo Bands 10 7.20.2 Servo Tracks 11 7.20.3 Signal 11 7.20.4 Signal-to Noise Ratio 11 7.20.5 Missing servo mark 11 8 Magnetic recording characteristics 12 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 00:54:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 22051:2002(E) © ISO/IEC 2002 All rights reserved v 8.1 Typical Field 13 8.2 Signal amplitude 13 8.3 Resolution 13 8.4 Overwrite 13 8.4.1 Requirement 13 9 Tape quality 13 9.1 Missing pulses 13 9.1.1 Requirement 13 9.2 Missing pulse zone 13 9.2.1 Requirement 13 9.3 Tape durability 13 Section 3 - Mechanical specifications of the tape cartridge 14 10 General 14 10.1 Bottom side and right side 14 10.2 Back side and left side 15 10.3 Tape reel 16 10.4 Tape leader 17 10.5 Front side 18 10.6 Operation of the cartridge 18 10.7 Tape winding 19 10.8 Moment of inertia 19 10.9 Material 19 Section 4 - Requirements for an interchanged tape 29 11 Tape format 29 11.1 Reference Edge 29 11.2 Direction of recording 29 11.3 Tape layout 29 11.3.1 Data Area 29 11.3.2 Forward Alignment and Directory Area 31 11.3.3 Reverse Alignment Area at EOT 32 12 Data format 33 12.1 Record 33 12.2 Data Bytes 33 12.3 Data Field 33 12.3.1 Pages 34 12.3.2 Pad Bytes 34 12.3.3 Page layout 34 12.3.4 MAP entries 34 12.3.5 EDC 35 12.4 Data Blocks 35 12.4.1 Control Field 1 (CF1) 36 12.4.2 Control Field 2 (CF2) 37 12.4.3 CRC 39 13 Method of recording 39 13.1 Physical recording density 40 13.2 Channel bit cell length 40 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 00:54:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 22051:2002(E) vi © ISO/IEC 2002 All rights reserved 13.2.1 Average Channel bit cell length 40 13.2.2 Long-term average Channel bit cell length 40 13.2.3 Short-term average Channel bit cell length 40 13.3 Read signal amplitude 40 13.4 Channel skew 40 14 Block Recording Format 41 14.1 Scrambler 41 14.2 Modulation 41 14.2.1 Modulation process 41 14.2.2 Modulated Data Group 42 14.3 Precoder 42 14.4 Recording Data Block 43 14.4.1 Preamble 43 14.4.2 Sync 43 15 Types and Use of Blocks 43 15.1 Types of Blocks 43 15.2 Use of blocks 43 15.2.1 Track ID Start Blocks 43 15.2.2 End of Track Blocks (EOTR) 44 15.2.3 End of Data of Data Blocks (EOD) 44 15.2.4 ECC Blocks 44 15.2.5 Track ID End Blocks 44 16 Format of Entities 44 17 Format of Envelopes 44 18 Error handling 44 Annexes A - Measurement of light transmittance 45 B - Procedure for the measurement of abrasivity 48 C - Generation of the Data Block CRCs 50 D - Generation of page CRCs 51 E - ECC generation 52 F - Allocation of Physical Tracks to Logical Tracks 55 G - Recommendations for transportation 56 H - Inhibitor tape 57 J - Recommendations on tape durability 58 K - Handling guidelines 59 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 00:54:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 22051:2002(E) © ISO/IEC 2002 All rights reserved vii 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. The main task of the joint technical committee is to prepare International Standards. 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. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 22051 was prepared by ECMA (as ECMA-320) and was adopted, under a special “fast-track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approval by national bodies of ISO and IEC. Annexes A to F form a normative part of this International Standard. Annexes G to K are for information only. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 00:54:43 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 00:54:43 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO/IEC 22051:2002(E) © ISO/IEC 2002 All rights reserved 1 Information technology Data interchange on 12,7 mm, 448-track magnetic tape cartridges SDLT1 format Section 1 - General 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. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/05/2007 00:54:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 22051:2002(E) 2 © ISO/IEC 2002 All rights reserved 4.3 block A set of contiguous bytes recorded on a physical track and considered as a unit. 4.4 byte An ordered set of bits acted upon as a unit. NOTE - In this In