1、 INCITS/ISO/IEC 15718:19982010 (ISO/IEC 15718:1998, IDT) Information technology - Data interchamge on 8 mm wide magnetic tape cartridge - Helical scan recording - HH-1 format Reaffirmed as INCITS/ISO/IEC 15718:1998 R2015INCITS/ISO/IEC 15718:19982010 PDF disclaimer This PDF file may contain embedded
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5、on Technology Standards) as an American National Standard. Date of ANSI Approval: 9/29/2010 Published by American National Standards Institute, 25 West 43rd Street, New York, New York 10036 Copyright 2010 by Information Technology Industry Council (ITI). All rights reserved. These materials are subj
6、ect to copyright claims of International Standardization Organization (ISO), International Electrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information Technology Industry Council (ITI). Not for resale. No part of this publication may be reproduced in any form, in
7、cluding an electronic retrieval system, without the prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1101 K Street NW, Suite 610, Washington DC 20005. Printed in the United States of America ii ITIC 2010 All rights reserved B CReference numberISO/
8、IEC 15718:1998(E)INTERNATIONALSTANDARDISO/IEC15718First edition1998-08-01Information technology Data interchangeon 8 mm wide magnetic tape cartridge Helical scan recording HH-1 formatTechnologies de linformation change de donnes sur cartouche debande magntique de 8 mm de large Enregistrement par bal
9、ayage enspirale Format HH-1ISO/IEC 15718:1998 (E)iiContentsSection 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 Address 24.2 a.c. erase 24.3 algorithm 24.4 Area ID 24.5 Average S
10、ignal Amplitude 24.6 azimuth 24.7 back surface 24.8 bit cell 24.9 byte 24.10 cartridge 24.11 Channel bit 24.12 compressed data 24.13 Cyclic Redundancy Check (CRC) character 24.14 Data Format ID 24.15 End of Data (EOD) 24.16 Error Correcting Code 24.17 flux transition position 24.18 flux transition s
11、pacing 24.19 Frame 24.20 Logical Beginning of Tape (LBOT) 24.21 record 24.22 magnetic tape 24.23 Master Standard Reference Tape 34.24 Partition Boundary 3 ISO/IEC 1998All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any mean
12、s, electronicor mechanical, including photocopying and microfilm, without permission in writing from the publisher.ISO/IEC Copyright Office Case Postale 56 CH-1211 Genve 20 SwitzerlandPrinted in SwitzerlandISO/IEC ISO/IEC 15718:1998 (E)iii4.25 Physical Beginning of Tape (PBOT) 34.26 Physical End of
13、Tape (PEOT) 34.27 physical recording density 34.28 Reference Field 34.29 Secondary Standard Reference Tape 34.30 Standard Reference Amplitude (SRA) 34.31 Standard Reference Recording Current 34.32 Tape Reference Edge 34.33 Test Recording Current 34.34 track 34.35 Typical Field 34.36 uncompressed dat
14、a 35 Conventions and notations 35.1 Representation of numbers 35.2 Names 46 Acronyms 47 Environment and safety 47.1 Testing environment 47.2 Operating environment 47.3 Storage environment 47.4 Transportation 47.5 Safety 57.6 Flammability 5Section 2 - Requirements for the case 68 Dimensional and mech
15、anical characteristics of the case 68.1 General 68.2 Overall dimension 68.3 Holding areas 78.4 Cartridge insertion 78.5 Window 88.6 Loading grips 88.7 Label areas 88.8 Datum areas and datum holes 88.9 Support Areas 98.10 Recognition holes 108.11 Write-inhibit hole 108.12 Pre-positioning surfaces 118
16、.13 Cartridge lid 118.14 Cartridge reel lock 128.15 Reel access holes 138.16 Interface between the reels and the drive spindles 138.17 Light path 158.18 Position of the tape in the case 158.19 Tape path zone 168.20 Tape access cavity 168.21 Tape access cavity clearance requirements 16Section 3 - Req
17、uirements for the Unrecorded Tape 339 Mechanical, physical and dimensional characteristics of the tape 339.1 Materials 33ISO/IEC 15718:1998 (E) ISO/IECiv9.2 Tape length 339.2.1 Magnetic tape 339.2.2 Leader and trailer tapes 339.2.3 Splicing tape 339.3.1 Width of magnetic tape 339.3.2 Width of leader
18、 and trailer tapes 339.3.3 Width and position of splicing tape 339.4 Discontinuities 339.5 Thickness 339.5.1 Thickness of the magnetic tape 339.5.2 Thickness of leader and trailer tape 349.5.3 Thickness of the splicing tape 349.6 Longitudinal curvature 349.7 Cupping 349.8 Coating adhesion 349.9 Laye
19、r-to-layer adhesion 359.10 Tensile strength 359.10.1 Breaking strength 359.10.2 Yield strength 359.11 Residual elongation 359.12 Electrical resistance of coated surfaces 359.13 Tape winding 369.14 Light transmittance of tape 369.15 Media Recognition System (MRS) 3610 Magnetic recording characteristi
20、cs 3710.1 Typical Field 3710.2 Signal amplitude 3810.3 Resolution 3810.4 Overwrite 3810.5 Ease of erasure 3810.6 Tape quality 3810.6.1 Missing pulses 3810.6.2 Missing pulse zone 3810.7 Signal-to-Noise Ratio (SNR) 39Section 4 - Requirements for an interchanged tape 4011 Format 4011.1 General 4011.2 I
21、nformation Matrix 4111.2.1 Loading the Information Matrix 4111.3 Sync Block 5311.3.1 Sync Block Data 5311.3.2 Sync Block Header 5311.3.3 Sync Block Header in Preamble Zone 5411.4 Data Zone 5411.4.1 Identification and arrangement of Information Blocks in the Data Zone of a Frame 5411.4.2 Identificati
22、on and arrangement of Sync Blocks in Data Zone of a Track 55ISO/IEC ISO/IEC 15718:1998 (E)v12 Method of recording 5512.1 Physical recording density 5512.2 Long-term average bit cell length 5512.3 Short-term average bit cell length 5512.4 Rate of change 5612.5 Bit shift 5612.6 Read signal amplitude 5
23、612.7 Recording current 5613 Track geometry 5613.1 Track configuration 5613.2 Average track pitch 5713.3 Variations of the track pitch 5713.4 Track width 5713.5 Track angle 5713.6 Track edge linearity 5713.7 Track length 5713.8 Data Zone reference 5713.9 Azimuth angles 5714 Recording pattern 5714.1
24、Recorded Sync Block 5714.2 Preamble Zone 5714.3 Postamble Zone 5715 Format of a track 5815.1 Track capacity 5815.2 Positioning accuracy 5815.3 Tracking scheme 5816 Layout of a Single Data Space tape 5816.1 Frame type 5816.1.1 Data Frame 5816.1.2 Gap Frame 5816.1.3 Long File Mark Frame 5816.1.4 Short
25、 File Mark Frame 5816.1.5 Set Mark Frame 5816.1.6 End of Data Frame 5816.1.7 Format Frame 5916.1.8 Data Frame in System Area 5916.2 Device Area 5916.3 Reference Area 5916.4 System Area 5916.4.1 Guard Band No.1 5916.4.2 System Log Preamble 5916.4.3 System Log 5916.4.4 System Log Postamble 5916.4.5 Gu
26、ard Band No.2 5916.4.6 Data Area Preamble 5916.5 Data Area 5916.5.1 Long File Mark 5916.5.2 Short File Mark 5916.5.3 Set Mark 60ISO/IEC 15718:1998 (E) ISO/IECvi16.5.4 Write operation 6016.5.5 Append and overwrite operations 6016.5.6 Rewritten Frames 6016.6 EOD Area 6016.7 Post-EOD Area 6017 Layout o
27、f a partitioned tape 6117.1 Overall magnetic tape layout 6117.1.1 Device Area 6117.1.2 Partition 1 6117.1.3 Partition 0 6217.2 Partition Identification 62AnnexesA - Measurement of light transmittance of tape and leaders 63B - Measurement of Signal-to-Noise Ratio 66C - Representation of 8-bit bytes b
28、y 10-bit patterns 67D - Measurement of bit shift 75E - Measurement of track edge linearity tolerance 78F - Recommendations for transportation 79G - Example of the content of a Data Block in the System Area 80ISO/IEC ISO/IEC 15718:1998 (E)viiForewordISO (the International Organization for Standardiza
29、tion) and IEC (the International Electrotechnical Commission) form thespecialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in thedevelopment of International Standards through technical committees established by the respective organization to d
30、eal withparticular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Otherinternational 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
31、 have established a joint technical committee, ISO/IEC JTC 1. DraftInternational Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as anInternational Standard requires approval by at least 75 % of the national bodies casting a vote.Internati
32、onal Standard ISO/IEC 15718 was prepared by JISC (as Standard JIS X.6143-1997) with document support andcontribution from ECMA (ECMA-247) and was adopted, under a special “fast-track procedure”, by Joint Technical CommitteeISO/IEC JTC 1, Information technology, in parallel with its approval by natio
33、nal bodies of ISO and IEC.Annexes A to E form an integral part of this International Standard. Annexes F and G are for information only.INTERNATIONAL STANDARD ISO/IEC ISO/IEC 15718:1998 (E)Information technology Data interchange on 8 mm wide magnetic tapecartridge Helical scan recording HH-1 format1
34、Section 1 - General1ScopeThis International Standard specifies the physical and magnetic characteristics of an 8 mm wide magnetic tape cartridge so as toprovide physical interchange of such cartridges between drives. It also specifies the quality of the recorded signals, therecording method and the
35、recorded format - called HH-1 format - thereby allowing for full data interchange between drives bymeans of such magnetic tape cartridges.Information interchange between systems also requires, as a minimum, agreement between the interchange parties upon theinterchange code(s) and the specifications
36、of the structure and labelling of the information on the interchanged cartridge.2 Conformance2.1 Magnetic tape cartridgeA tape cartridge shall be in conformance with this International Standard if it meets all the mandatory requirements specifiedherein. The tape requirements shall be satisfied throu
37、ghout the extent of the tape.2.2 Generating driveA drive generating a magnetic tape cartridge for interchange shall be in conformance with this International Standard if allrecordings on the tape meet the mandatory requirements of this International Standard.A claim of conformance shall state which
38、of the following optional features are implemented and which are not the performing of a Read-After-Write check and the recording of any necessary rewritten frames; the generation of ECC3 Blocks.In addition a claim of conformance shall state whether or not, registered data compression algorithm(s) a
39、re implemented within the system and are able to compress datareceived from the host, and the registered identification number(s) of the implemented algorithm(s).2.3 Receiving driveA drive receiving a magnetic tape cartridge for interchange shall be in conformance with this International Standard if
40、 it is ableto handle any recording made on the tape according to this International Standard. In particular it shall be able to recognize rewritten frames and to make available to the host, data and File Marks from only one of these frames; be able to recognize a ECC3 Block, and ignore it if the sys
41、tem is not capable of using ECC3 check bytes in a process oferror correction; be able to recognize compressed data, identify the algorithm used, and make the algorithm registration number available tothe host; be able to make compressed data available to the host.In addition a claim of conformance s
42、hall state whether or not the system is capable of using ECC3 check bytes in a process of error correction; whether or not one or more decompression algorithm(s) are implemented within the system, and are able to be applied tocompressed data prior to making such data available to the host; the regis
43、tered identification number(s) of the data compression algorithm(s) for which a complementary data decompressionalgorithm is implemented. whether or not the system is capable of updating the System Log(s) if the Write-inhibit Hole state so permits.ISO/IEC 15718:1998 (E) ISO/IEC23 Normative reference
44、sThe following standards contain provisions which, through reference in this text, constitute provisions of this InternationalStandard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties toagreements based on this International Standard
45、are encouraged to investigate the possibility of applying the most recenteditions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid InternationalStandards.ISO 527-1:1993, Plastics Determination of tensile properties Part 1: General principles.ISO 1302:199
46、2, Technical drawings Method of indicating surface texture.ISO/IEC 11576:1995, Information technology Procedure for the registration of algorithms for the lossless compressionof data.IEC 950:1991, Safety of information technology equipment.4 DefinitionsFor the purposes of this International Standard
47、, the following definitions apply.4.1 Absolute Frame Address: A sequence number, encoded in the Frame.4.2 a.c. erase: A process of erasure utilising alternating magnetic fields of decaying intensity.4.3 algorithm: A set of rules for transforming the logical representation of data.4.4 Area ID: Identi
48、fier of an area of the tape.4.5 Average Signal Amplitude: The average peak-to-peak value of the output signal from the read head at thespecified physical recording density over a minimum of 20,7 mm of track, exclusive of missing pulses.4.6 azimuth: The angular deviation, in degrees of arc, made by t
49、he mean flux transition line with a line normal to thecentreline of the recorded track.4.7 back surface: The surface of the tape opposite to the magnetic coating which is used to record data.4.8 bit cell: A distance along the track allocated for the recording of a Channel bit.4.9 byte: An ordered set of bits acted upon as a unit.4.10 cartridge: A case containing magnetic tape stored on twin hubs.4.11 Channel bit: A bit aft
