1、Reference number ISO/IEC 17913:2000(E) ISO/IEC 2000 INTERNATIONAL STANDARD ISO/IEC 17913 First edition 2000-06-15 Information technology 12,7 mm 128-track magnetic tape cartridge for information interchange Parallel serpentine format Technologies de linformation Cartouches de bande magntique de 12,7
2、 mm, 128 pistes pour lchange dinformation Format serpentant parallleISO/IEC 17913:2000(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are li
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5、g to it is found, please inform the Central Secretariat at the address given below. ISO/IEC 2000 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, wit
6、hout permission in writing from either ISO at the address below or ISOs 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 22 734 10 79 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO/IEC 2000 All ri
7、ghts reservedISO/IEC 17913:2000(E) ISO/IEC 2000 All rights reserved iii Contents Page Section 1 - General 1 1 Scope 1 2 Conformance 1 2.1 Magnetic tape cartridge 1 2.2 Generating system 1 2.3 Receiving system 1 3 Normative references 1 4 Definitions 1 4.1 algorithm 1 4.2 anhysteretic erase 1 4.3 ave
8、rage signal amplitude 2 4.4 azimuth 2 4.5 back surface 2 4.6 beginning of partition (BOP) 2 4.7 beginning of tape (BOT) 2 4.8 cartridge 2 4.9 cyclic redundancy check (CRC) character 2 4.10 end of tape (EOT) 2 4.11 error-correcting code (ECC) 2 4.12 error-detecting code (EDC) 2 4.13 File Mark 2 4.14
9、flux transition position 2 4.15 flux transition spacing 2 4.16 half-wrap 2 4.17 logical block 2 4.18 logical forward 2 4.19 logical reverse 2 4.20 magnetic tape 2 4.21 mark tach count 2 4.22 Master Standard Reference Tape 2 4.23 physical recording density 2 4.24 pre-record condition 2 4.25 recorded
10、element 2 4.26 Reference Field 2 4.27 resync character 2 4.28 SDM set 2 4.29 Secondary Standard Reference Tape (SSRT) 2 4.30 servo track 3 4.31 Standard Reference Amplitude (SRA) 3 4.32 Standard Reference Current (I r ) 3 4.33 Test Recording Current (I m ) 3 4.34 track 3 4.35 track group 3 4.36 trai
11、ler 3 4.37 Typical Field 3 4.38 write equalisation 3ISO/IEC 17913:2000(E) iv ISO/IEC 2000 All rights reserved 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 Cartridg
12、e operating environment 4 6.3 Cartridge storage environment 4 6.4 Safety 5 6.4.1 Safeness 5 6.4.2 Flammability 5 6.5 Transportation 5 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 Width 5 7.4 Total thickness 5 7.5 B
13、ase material thickness 5 7.6 Discontinuity 5 7.7 Longitudinal curvature 5 7.7.1 Requirement 5 7.7.2 Procedure 5 7.8 Out-of-Plane distortions 5 7.9 Cupping 6 7.9.1 Requirement 6 7.9.2 Procedure 6 7.10 Coefficient of dynamic friction 6 7.10.1 Requirements 6 7.10.2 Procedure 6 7.11 Coating adhesion 7 7
14、.12 Layer-to-layer adhesion 7 7.12.1 Requirements 7 7.12.2 Procedure 7 7.13 Electrical resistance 8 7.13.1 Requirement 8 7.13.2 Procedure 8 7.14 Abrasivity 9 7.15 Friction characteristics after stress 9 7.15.1 Requirements 9 7.15.2 Procedure 9 7.16 Surface roughness 9 7.16.1 Requirement 9 7.16.2 Pro
15、cedure 9 7.17 Inhibitor tape 10ISO/IEC 17913:2000(E) ISO/IEC 2000 All rights reserved v 8 Magnetic recording characteristics 10 8.1 Typical Field 10 8.2 Signal amplitude 10 8.3 Resolution 10 8.4 Broad-band signal-to-noise ratio (BBSNR) 10 8.4.1 Requirement 10 8.4.2 Procedure 10 9 Tape quality 11 9.1
16、 Missing pulse 11 9.1.1 Requirement 11 9.1.2 Procedure 11 9.2 Coincident missing pulse 11 9.2.1 Requirement 11 9.2.2 Procedure 11 9.3 Missing pulse density 12 9.3.1 Requirement 12 9.3.2 Procedure 12 9.4 Tape durability 12 Section 3 - Mechanical specifications of the tape cartridge 12 10 General 12 1
17、0.1 Overall dimensions 13 10.2 Write-inhibit mechanism 13 10.3 Label areas of the rear side 13 10.4 Label area on the top side 14 10.5 Case opening 14 10.6 Locating notches 14 10.7 Locating areas 15 10.8 Inside configuration of the case around the case opening 15 10.9 Other external dimensions of th
18、e case 15 10.10 Central window 15 10.11 Stacking ribs 16 10.12 Recessed area 16 10.13 Flexibility of the case 16 10.13.1 Requirements 16 10.13.2 Procedure 17 10.14 Tape reel 17 10.14.1 Locking mechanism 17 10.14.2 Axis of rotation of the reel 17 10.14.3 Metallic insert 17 10.14.4 Toothed rim 17 10.1
19、4.5 Hub of the reel 18 10.14.6 Relative positions 18 10.14.7 Characteristics of the toothed rim 19 10.15 Leader block 19 10.16 Attachment of the tape to the leader block 20 10.17 Latching mechanism 20 10.18 Tape wind 20 10.19 Wind tension 20 10.20 Circumference of the tape reel 20 10.21 Moment of in
20、ertia 21 10.22 Material 21ISO/IEC 17913:2000(E) vi ISO/IEC 2000 All rights reserved 10.23 Cartridge identification notches 21 10.24 Finger slot 21 Section 4 - Requirements for an interchanged tape 31 11 Method of recording 31 11.1 Physical recording density 31 11.2 Bit cell length 31 11.3 Average bi
21、t cell length 31 11.3.1 Long-term average RLL bit cell length 31 11.3.2 Short-term average RLL bit cell length 31 11.4 Rate of change of the short-term average RLL bit cell length 31 11.5 Bit shift 31 11.6 Total character skew 31 11.7 Missing zero-crossing zones 32 11.8 Coincident missing zero-cross
22、ing zones 32 12 Servo tracks 32 12.1 Locations of the servo tracks 32 12.2 Physical width of the servo tracks 33 12.3 Format of the servo tracks 33 12.4 Servo requirements 34 12.4.1 Servo amplitude 34 12.4.2 Servo azimuth 34 12.4.3 Servo errors 34 12.4.4 Servo edge spacing 35 12.5 Procedure 35 13 Da
23、ta track format 35 13.1 Number of data tracks 35 13.2 Track positions 35 13.3 Track width 37 13.4 Data azimuth 37 13.5 Half-wraps 37 14 Tape format 37 14.1 General 37 14.2 Recording area 37 14.3 Tach count 39 14.4 Physical blocks 39 14.5 Servo acquisition region 40 14.6 Volume control region 40 14.7
24、 Data region 40 14.8 Data entities 40 15 Packet format 42 15.1 Packet header 43 15.2 Packet data 45 15.3 Packet trailer 45 16 Device blocks 45 16.1 Data device blocks 45 16.2 Mark device blocks 45 16.3 File Mark 45 16.4 Void mark 46 16.5 Beginning of half-wrap mark 46 16.6 End of half-wrap mark 46 1
25、6.7 BOP mark 46ISO/IEC 17913:2000(E) ISO/IEC 2000 All rights reserved vii 16.8 EOD mark 46 16.9 SDM mark 46 16.10 FID mark 47 16.11 DBM mark 48 16.11.1 DBM general information packet 48 16.11.2 DBM wrap region packet 49 16.11.3 DBM partitions packet 49 16.11.4 DBM servo demark packet 50 16.11.5 DBM
26、File Mark packet 50 16.12 SARS mark 51 16.13 DBM checked out mark 51 16.14 DBM valid mark 51 17 Device block format 51 17.1 Device block header 51 17.1.1 Device block control 52 17.1.2 Device block sequence control 54 17.1.3 Vendor identification code 54 17.2 Device block data 54 17.3 Device block t
27、railer 54 18 ECC 54 18.1 CRC 54 18.2 Code block 55 18.3 ECC encoded code block 55 18.4 Codeword correction code generation 56 18.5 MIE pointer code generation 57 18.6 ECC encoded interleave unit 57 18.7 Short error correction code generation 57 19 Recording of bytes on tape 59 19.1 Synchronisation f
28、ormat 59 19.2 Interblock gap formatting 62 19.3 RLL byte translation 63 19.4 Write equalisation bit translation 63 19.5 Writing bits on tape 63 Annexes A-Tape abrasivity measurement procedure 64 B-Me di at y pel a be l 66 C-Measurement of bit shift 70 D-Vendor Identification Code 72 E-Recommendation
29、s for transportation 73 F-Inhibitor tape 74 G-Tape durability 75ISO/IEC 17913:2000(E) viii ISO/IEC 2000 All rights reserved Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardizat
30、ion. 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
31、 interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. In the field of information technology, ISO and IEC have
32、 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. Attention i
33、s 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. International Standard ISO/IEC 117913 was prepared by ECMA (as ECMA-278) and was adopted,
34、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, B, C and D form a normative part of this International Standard. Annexes E to G are for information only.INTERNATION
35、AL STANDARD ISO/IEC 17913:2000(E) ISO/IEC 2000 All rights reserved 1 Information technology 12,7 mm 128-track magnetic tape cartridge for information interchange Parallel serpentine format Section 1 - General 1S c o p e This International Standard specifies the physical and magnetic characteristics
36、of a magnetic tape cartridge, using a magnetic tape 12,7 mm wide, so as to provide physical interchange of such cartridges between drives. It also specifies the quality of the recorded signals, the recording method and the recorded format known as Parallel Serpentine, thereby allowing data interchan
37、ge between drives by means of such cartridges. The format supports variable length Logical Records, high speed search, and the use of the algorithm for data compression specified in International Standard ISO/IEC 15200. Information interchange between systems also requires, at a minimum, agreement b
38、etween the interchange parties upon the interchange code(s) and the specification of the structure and labelling of the information on the interchanged cartridge. Together with a standard for volume and file structure, e.g. International Standard ISO 1001, this International Standard provides for fu
39、ll data interchange between data processing systems. 2 Conformance 2.1 Magnetic tape cartridge A tape cartridge shall be in conformance with this International Standard if it meets all the mandatory requirements specified herein. The tape requirements shall be satisfied throughout the extent of the
40、tape. 2.2 Generating system A generating system shall be in conformance with this International Standard if it generates a tape according to 2.1. 2.3 Receiving system A receiving system shall be in conformance with this International Standard if it can read all tapes according to 2.1. 3 Normative re
41、ferences 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
42、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
43、valid International Standards. ISO 1001: 1986, Information processing File structure and labelling of magnetic tapes for information interchange. IEC 60950:1999, Safety of information technology equipment. ISO/IEC 15200:1996, Information technology Adaptive Lossless Data Compression algorithm (ALDC)
44、. ISO/R 527:1966, Plastics Determination of tensile properties. ISO/IEC 646:1991, Information technology ISO 7-bit coded character set for information interchange. ISO 683-13:1986, Heat-treatable steels, alloy steels and free-cutting steels Part 13: Wrought stainless steels. ANSI MH10.8M-1993, Mater
45、ials Handling Unit Loads and Transport Packages Bar Code Symbols. 4 Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 4.1 algorithm: A set of rules for transforming the logical representation of data. 4.2 anhysteretic erase: A process o
46、f erasure utilising an alternating magnetic field of decaying level.ISO/IEC 17913:2000(E) 2 ISO/IEC 2000 All rights reserved 4.3 average signal amplitude: The average peak-to-peak value of the signal output measured over a minimum of 25,4 mm, exclusive of missing pulses. 4.4 azimuth: The angle, in m
47、inutes of arc, of the mean flux transition line of a track from a line normal to the tape Reference Edge. 4.5 back surface: The surface of the tape opposite the recording surface. 4.6 beginning of partition (BOP): The point along the length of the tape where recording in any partition begins. 4.7 be
48、ginning of tape (BOT): The point along the length of the magnetic tape, indicated by the start of recorded information. 4.8 cartridge: A container holding a single supply reel of magnetic tape with an attached leader block at the BOT end. 4.9 cyclic redundancy check (CRC) character: A four-byte char
49、acter used for error detection. 4.10 end of tape (EOT): The point on a track farthest from BOT up to which recording is allowed. 4.11 error-correcting code (ECC): An algorithm yielding bytes used for error detection and correction. 4.12 error-detecting code (EDC): An algorithm yielding bytes used for error detection. 4.13 File Mark: A recorded element requested by a host that marks the end of a host data file or aggregate. 4.14 flux transition position: The point on the magnetic tape that exhibits the maximum free-spa
