1、Reference numberISO/IEC 17462:2000(E)ISO/IEC 2000Information technology 3,81 mm widemagnetic tape cartridge for informationinterchange Helical scan recording DDS-4 formatTechnologies de linformation Cartouche bande magntique de3,81 mm de large pour lchange dinformation Enregistrement parbalayage en
2、spirale Format DDS-4National Standard of CanadaCAN/CSA-ISO/IEC 17462:04(ISO/IEC 17462:2000)International Standard ISO/IEC 17462:2000 (first edition, 2000-09-15) has been adopted withoutmodification (IDT) as CSA Standard CAN/CSA-ISO/IEC 17462:04, which has been approved as a NationalStandard of Canad
3、a by the Standards Council of Canada.ISBN 1-55397-729-7 December 2004The Canadian Standards Association (CSA), under whose auspices this National Standard has been produced, was chartered in 1919 and accredited by the Standards Council of Canada to the National Standards system in 1973. It is a not-
4、for-profit, nonstatutory, voluntary membership association engaged in standards development and certification activities. CSA standards reflect a national consensus of producers and users including manufacturers, consumers, retailers, unions and professional organizations, and governmental agencies.
5、 The standards are used widely by industry and commerce and often adopted by municipal, provincial, and federal governments in their regulations, particularly in the fields of health, safety, building and construction, and the environment. Individuals, companies, and associations across Canada indic
6、ate their support for CSAs standards development by volunteering their time and skills to CSA Committee work and supporting the Associations objectives through sustaining memberships. The more than 7000 committee volunteers and the 2000 sustaining memberships together form CSAs total membership from
7、 which its Directors are chosen. Sustaining memberships represent a major source of income for CSAs standards development activities. The Association offers certification and testing services in support of and as an extension to its standards development activities. To ensure the integrity of its ce
8、rtification process, the Association regularly and continually audits and inspects products that bear the CSA Mark. In addition to its head office and laboratory complex in Toronto, CSA has regional branch offices in major centres across Canada and inspection and testing agencies in eight countries.
9、 Since 1919, the Association has developed the necessary expertise to meet its corporate mission: CSA is an independent service organization whose mission is to provide an open and effective forum for activities facilitating the exchange of goods and services through the use of standards, certificat
10、ion and related services to meet national and international needs.For further information on CSA services, write toCanadian Standards Association5060 Spectrum Way, Suite 100Mississauga, Ontario, L4W 5N6CanadaThe Standards Council of Canada is the coordinating body of the National Standards system, a
11、 federation of independent, autonomous organizations working towards the further development and improvement of voluntary standardization in the national interest. The principal objects of the Council are to foster and promote voluntary standardization as a means of advancing the national economy, b
12、enefiting the health, safety, and welfare of the public, assisting and protecting the consumer, facilitating domestic and international trade, and furthering international cooperation in the field of standards. A National Standard of Canada is a standard which has been approved by the Standards Coun
13、cil of Canada and one which reflects a reasonable agreement among the views of a number of capable individuals whose collective interests provide to the greatest practicable extent a balance of representation of producers, users, consumers, and others with relevant interests, as may be appropriate t
14、o the subject in hand. It normally is a standard which is capable of making a significant and timely contribution to the national interest. Approval of a standard as a National Standard of Canada indicates that a standard conforms to the criteria and procedures established by the Standards Council o
15、f Canada. Approval does not refer to the technical content of the standard; this remains the continuing responsibility of the accredited standards development organization. Those who have a need to apply standards are encouraged to use National Standards of Canada whenever practicable. These standar
16、ds are subject to periodic review; therefore, users are cautioned to obtain the latest edition from the organization preparing the standard.The responsibility for approving National Standards of Canada rests with theStandards Council of Canada270 Albert Street, Suite 200Ottawa, Ontario, K1P 6N7Canad
17、aAlthough the intended primary application of this Standard is stated in its Scope, it is importantto note that it remains the responsibility of the users to judge its suitability for their particular purpose.Registered trade-mark of Canadian Standards AssociationCAN/CSA-ISO/IEC 17462:04Information
18、technology 3,81 mm wide magnetic tape cartridge forinformation interchange Helical scan recording DDS-4 formatDecember 2004 Canadian Standards Association CSA/1CAN/CSA-ISO/IEC 17462:04Information technology 3,81 mm wide magnetic tape cartridge for information interchange Helical scan recording DDS-4
19、 formatStandards development within the Information Technology sector is harmonized with international standards development. Through the CSA Technical Committee on Information Technology (TCIT), Canadians serve as the Canadian Advisory Committee (CAC) on ISO/IEC Joint Technical Committee 1 on Infor
20、mation Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO member body for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of the International Telecommunication Union (ITU), Canada participates in the International Telegraph and Telephone
21、 Consultative Committee (ITU-T).This International Standard was reviewed by the CSA TCIT under the jurisdiction of the Strategic Steering Committee on Information Technology and deemed acceptable for use in Canada. (A committee membership list is available on request from the CSA Project Manager.) F
22、rom time to time, ISO/IEC may publish addenda, corrigenda, etc. The CSA TCIT will review these documents for approval and publication. For a listing, refer to the CSA Information Products catalogue or CSA Info Update or contact a CSA Sales representative. This Standard has been formally approved as
23、a National Standard of Canada by the Standards Council of Canada.December 2004 Canadian Standards Association 2004All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission ofthe publisher. ISO/IEC material is reprinted with permission. Whe
24、re the words “this International Standard” appear in the text, they should be interpreted as “this National Standard of Canada”.Inquiries regarding this National Standard of Canada should be addressed toCanadian Standards Association5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61
25、-800-463-6727 416-747-4044www.csa.caReference numberISO/IEC 17462:2000(E)ISO/IEC 2000INTERNATIONALSTANDARDISO/IEC17462First edition2000-09-15Information technology 3,81 mm widemagnetic tape cartridge for informationinterchange Helical scan recording DDS-4 formatTechnologies de linformation Cartouche
26、 bande magntique de3,81 mm de large pour lchange dinformation Enregistrement parbalayage en spirale Format DDS-4ISO/IEC 17462:2000(E)PDF disclaimerThis PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall notbe edited unles
27、s the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloadingthis file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability inthis area.Adobe is a trademark of
28、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-creationparameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In theun
29、likely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO/IEC 2000All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronicor mechanical, includin
30、g photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member bodyin the country of the requester.ISO copyright officeCase postale 56 Gb7 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.chWeb www.iso.chii ISO/IEC 2000
31、All rights reservedISO/IEC 17462:2000 (E)Gd3ISO/IEC 2000 - All rights reserved iiiContentsSection 1 - General 11 Scope 12 Conformance 12.1 Magnetic tape cartridge 12.2 Generating drive 12.3 Receiving drive 13 Normative references 24 Definitions 24.1 Absolute Frame Number (AFN) 24.2 a.c. erase 24.3 A
32、ccess Point 24.4 algorithm 24.5 Area ID 24.6 Average Signal Amplitude 24.7 azimuth 24.8 back surface 24.9 byte 24.10 cartridge 24.11 Channel bit 24.12 Codeword 24.13 Data Format ID 24.14 Early Warning Point (EWP) 24.15 End of Data (EOD) 24.16 Entity 24.17 Error Correcting Code (ECC) 24.18 flux trans
33、ition position 24.19 flux transition spacing 24.20 Fragment 24.21 Frame 34.22 Housekeeping Frame 34.23 Logical Beginning of Tape (LBOT) 34.24 magnetic tape 34.25 Master Standard Amplitude Calibration Tape 34.26 Master Standard Reference Tape 34.27 Optimum Recording Field 34.28 Partition Boundary 34.
34、29 Physical Beginning of Tape (PBOT) 34.30 Physical End of Tape (PEOT) 34.31 physical recording density 34.32 pre-recording condition 34.33 processing 34.34 processed data 34.35 Processed Record 34.36 Processed Record Sequence 3ISO/IEC 17462:2000 (E)Gd3ISO/IEC 2000 - All rights reservediv4.37 record
35、 34.38 Reference Recording Field34.39 reprocessing 34.40 Secondary Standard Amplitude Calibration Tape 34.41 Secondary Standard Reference Tape 34.42 Separator Mark 44.43 Standard Reference Amplitude 44.44 Tape Reference Edge 44.45 Test Recording Current 44.46 track 44.47 Unprocessed Record 44.48 Vir
36、tual End of Tape (VEOT) 45 Conventions and Notations 46 Acronyms 47 Environment and safety 47.1 Testing environment 47.2 Operating environment 57.3 Storage environment 57.4 Transportation 57.5 Safety 57.6 Flammability 5Section 2 - Requirements for the case 68 Dimensional and mechanical characteristi
37、cs of the case 68.1 General 68.2 Overall dimensions 68.3 Loading grip 78.4 Holding areas 78.5 Notches of the lid 78.6 Lid dimensions 78.7 Optical detection of the beginning and end of tape 88.8 Bottom side 88.8.1 Locking mechanism of the slider 88.8.2 Access holes 98.8.3 Recognition, sub-datums, and
38、 write-inhibit holes 98.8.4 Datum holes 118.8.5 Access room for tape guides 118.8.6 Holes for accessing the hubs 118.8.7 Internal structure of the lower half 118.8.8 Light path 128.8.9 Support Areas 138.8.10 Datum Areas 138.8.11 Relationship between Support and Datum Areas and Reference Plane Z 138.
39、9 Hubs 138.10 Attachment of leader and trailer tapes 148.11 Interface between the hubs and the drive spindles 148.12 Opening of the lid 148.13 Release of the hub locking mechanism 148.14 Label areas 148.15 Requirement for autoloaders 15Section 3 - Requirements for the unrecorded tape 289 Mechanical,
40、 physical and dimensional characteristics of the tape 289.1 Materials 28ISO/IEC 17462:2000 (E)Gd3ISO/IEC 2000 - All rights reserved v9.2 Tape length 289.2.1 Length of magnetic tape 289.2.2 Length of leader and trailer tapes 289.2.3 Length of splicing tapes 289.3 Tape width 289.3.1 Width of magnetic
41、tape 289.3.2 Width of leader and trailer tapes 289.3.3 Width and position of splicing tape 289.3.4 Edge weave 289.4 Discontinuities 299.5 Tape thickness 309.5.1 Thickness of magnetic tape 309.5.2 Thickness of leader and trailer tape 309.5.3 Thickness of splicing tape 309.6 Longitudinal curvature 309
42、.7 Cupping 309.8 Coating adhesion 309.9 Layer-to-layer adhesion 319.10 Tensile strength 319.10.1 Breaking strength 319.10.2 Yield strength 319.11 Residual elongation 319.12 Flexural rigidity 319.13 Electrical resistance of coated surfaces 329.14 Abrasivity 329.15 Light transmittance of the tape 329.
43、16 Media Recognition System (MRS) 3310 Magnetic recording characteristics 3310.1 Optimum Recording Field 3410.2 Signal Amplitude 3410.3 Resolution 3410.4 Overwrite 3410.5 Ease of erasure 3510.6 Tape quality 3510.6.1 Missing pulses 3510.6.2 Missing pulse zone 3510.7 Signal-to-Noise Ratio (SNR) charac
44、teristic 35Section 4 - Requirements for an interchanged tape 3511 Format 3511.1 General 3511.2 Basic Groups 3611.2.1 Entity 3611.2.2 Group Information Table 3711.2.3 Block Access Table (BAT) 3911.3 Sub-Groups 4211.3.1 G1 Sub-Group 4211.3.2 G2 Sub-Group - Randomizing 4211.3.3 G3 Sub-Group 4311.3.4 G4
45、 Sub-Group 4411.3.5 Main Data Fragment 4811.3.6 Summary of the transformation of a Basic Group 5011.4 Sub code information 5011.4.1 Pack Item Number 0 5011.4.2 Pack Item Number 1 50ISO/IEC 17462:2000 (E)Gd3ISO/IEC 2000 - All rights reservedvi11.4.3 Pack Item Number 2 5111.4.4 Pack Item Number 3 5111
46、.4.5 Pack Item Number 4 5111.4.6 Pack Item Number 5 5211.4.7 Pack Item Number 6 5311.4.8 Pack Item Number 7 5311.4.9 Pack Item Number 8 5411.4.10 Pack Item Number 9 5411.4.11 Pack Item Number 10 5411.4.12 Pack Item Number 11 5511.4.13 Pack Item Number 12 5511.4.14 Pack Item Number 13 5611.4.15 Pack
47、Item Number 14 5611.4.16 Pack Item Number 15 5711.5 Sub code location 5711.5.1 Sub code Pack Items on a Single Data Space tape 5711.5.2 Sub code Pack Items on a partitioned tape 5712 Method of recording 5812.1 Physical recording density 5812.2 Long-term average bit cell length 5812.3 Short-term aver
48、age bit cell length 5812.4 Rate of change 5812.5 Bit shift 5812.6 Read signal amplitude 5812.7 Maximum recorded levels 5813 Track geometry 5813.1 Track configuration 5813.2 Average track pitch 5913.3 Variations of the track pitch 5913.4 Track width 5913.5 Track angle 5913.6 Track edge linearity 5913
49、.7 Track length 6013.8 Ideal tape centreline 6013.9 Azimuth angles 6014 Recorded patterns 6014.1 Recorded Main Data Fragment 6014.2 Preamble Zone, Margin Zones 6015 Format of a track 6015.1 Format of a track 6015.2 Positioning accuracy 6015.3 Tracking scheme 6116 LayoutofaSingleDataSpacetape 6116.1 Device Area 6116.2 Reference Area 6216.3 Position Tolerance Band No. 1 6216.4 System Area 6216.4.1 System Preamble 6216.4.2 System Log 6216.4.3 System Postamble 6216.4.4 Position Tolerance Band No. 2 6216.4.5 Vendor Group Preamb
