1、BRITISH STANDARD BS ISO/IEC 11557:1992 Implementation of ISO/IEC11557:1992 Information technology 3,81mm wide magnetic tape cartridge for information interchange Helical scan recording DDS-DC format using60m and90m length tapes UDC 681.327.636BSISO/IEC11557:1992 This BritishStandard, having been pre
2、pared under the directionof the Information Technology Systems StandardsPolicy Committee, waspublished under theauthorityof the StandardsBoard and comes into effect on 15May1993 BSI 03-2000 The following BSI references relate to the work on this standard: Committee reference IST/4 Draft for comment
3、91/65412 DC ISBN 0 580 21768 X Committees responsible for this BritishStandard The preparation of this BritishStandard was entrusted by the Information Technology Systems Standards Policy Committee (IST/-) to Technical Committee IST/4, upon which the following bodies were represented: British Comput
4、er Society ICI Imagedata Institution of Electrical Engineers International Computers Limited Kodak Limited Amendments issued since publication Amd. No. Date CommentsBSISO/IEC11557:1992 BSI 03-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword viii Text of IS
5、O/IEC11557 1BSISO/IEC11557:1992 ii BSI 03-2000 National foreword This BritishStandard reproduces verbatim ISO/IEC11557:1992 and implements it as the UK national standard. This BritishStandard is published under the direction of the Information Systems Technology Standards Policy Committee whose Tech
6、nical Committee IST/4 has the responsibility to: aid enquirers to understand the text; present to the responsible international committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate t
7、hem in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from BSI Sales Department, BSI, Linford Wood, Milton Keynes, MK14 6LE. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are respo
8、nsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theISO/IEC title page, pages ii to viii, pages1 to86 and a back cover. This
9、 standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.ISO/IEC11557:1992 (E) ii BSI 03-2000 Contents Page Foreword viii Introduction 1 Section 1. General 1 Scope 1 2 Normative references 1 3 Co
10、nformance 2 3.1 Magnetic tape cartridge 2 3.2 Generating system 2 3.3 Receiving system 2 4 Definitions 3 4.1 Absolute Frame Number 3 4.2 Access Point 3 4.3 algorithm 3 4.4 Automatic Track Finding 3 4.5 Area ID 3 4.6 Average Signal Amplitude 3 4.7 azimuth 3 4.8 back surface 3 4.9 byte 3 4.10 cartridg
11、e 3 4.11 Channel Bit 3 4.12 Codeword 3 4.13 Data Format ID 3 4.14 Early Warning Point 4 4.15 End of Data 4 4.16 Entity 4 4.17 Error Correcting Code 4 4.18 flux transition position 4 4.19 flux transition spacing 4 4.20 frame 4 4.21 Housekeeping Frame 4 4.22 Logical Beginning of Tape 4 4.23 magnetic t
12、ape 4 4.24 Master Standard Amplitude Calibration Tape 4 4.25 Master Standard Reference Tape 4 4.26 Optimum Recording Field 4 4.27 Partition boundary 5 4.28 Physical Beginning of Tape 5 4.29 Physical End of Tape 5 4.30 physical recording density 5 4.31 pre-recording condition 5 4.32 processing 5 4.33
13、 processed data 5 4.34 Processed Record 5 4.35 Processed Record Sequence 5 4.36 Record 5 4.37 Reference Recording Field 5 4.38 reprocessing 5 4.39 Secondary Standard Amplitude Calibration Tape 5 4.40 Secondary Standard Reference Tape 5ISO/IEC11557:1992 (E) BSI 03-2000 iii Page 4.41 Separator Mark 6
14、4.42 Standard Reference Amplitude 6 4.43 Tape Reference Edge 6 4.44 Test Recording Current 6 4.45 track 6 4.46 Unprocessed Data 6 4.47 Unprocessed Record 6 4.48 Virtual End of Tape 6 5 Environment and safety 6 5.1 Testing environment 6 5.2 Operating environment 6 5.3 Storage environment 7 5.4 Transp
15、ortation 7 5.5 Safety 7 5.6 Flammability 7 Section 2. Requirements for the case 6 Dimensional and mechanical characteristics of the case 7 6.1 General 7 6.2 Overall dimensions(Figure 6 andFigure 7) 8 6.3 Loading grip(Figure 6) 8 6.4 Holding areas(Figure 6) 8 6.5 Notches of the lid(Figure 5 andFigure
16、 8) 8 6.6 Lid dimensions(Figure 6 toFigure 8) 9 6.7 Optical detection of the beginning and end of tape (Figure 9 andFigure 12) 9 6.8 Bottom side(Figure 10 andFigure 11) 9 6.8.1 Locking mechanism of the slider 10 6.8.2 Access holes 10 6.8.3 Recognition, sub-datums, and write-inhibit holes 10 6.8.4 Da
17、tum holes 12 6.8.5 Access room for tape guides 12 6.8.6 Holes for accessing the hubs 12 6.8.7 Internal structure of the lower half(Figure 12) 12 6.8.8 Light path(Figure 12) 13 6.8.9 Support Areas(Figure 13) 14 6.8.10 Datum Areas(Figure 13) 14 6.8.11 Relationship between Support and Datum Areas and R
18、eference Plane Z(Figure 14) 14 6.9 Hubs(Figure 15 andFigure 16) 14 6.10 Leader and trailer attachment 14 6.11 Interface between the hubs and the drive spindles(Figure 17) 15 6.12 Opening of the lid(Figure 18) 15 6.13 Release of the hub locking mechanism(Figure 19 andFigure 20) 15 6.14 Label areas(Fi
19、gure 21 andFigure 22) 15 Section 3. Requirements for the unrecorded tape 7 Mechanical, physical and dimensional characteristics of the tape 26 7.1 Materials 26 7.2 Tape length 26ISO/IEC11557:1992 (E) iv BSI 03-2000 Page 7.2.1 Length of magnetic tape 26 7.2.2 Length of leader and trailer tapes 26 7.3
20、 Tape width 26 7.4 Discontinuities 26 7.5 Total thickness 26 7.6 Longitudinal curvature 26 7.7 Cupping 26 7.8 Coating adhesion 27 7.9 Layer-to-layer adhesion 27 7.10 Tensile strength 27 7.10.1 Breaking strength 27 7.10.2 Yield strength 27 7.11 Residual elongation 28 7.12 Electrical resistance of coa
21、ted surfaces 28 7.13 Light transmittance of the tape 29 8 Magnetic recording characteristics 29 8.1 Optimum Recording Field 29 8.2 Signal Amplitude 29 8.3 Resolution 29 8.4 Overwrite 29 8.4.1 Physical recording densities of750,6ftpmm and3002ftpmm 30 8.4.2 Physical recording densities of83,4ftpmm and
22、1001ftpmm 30 8.5 Ease of erasure 30 8.6 Tape quality 30 8.6.1 Missing pulses 30 8.6.2 Missing pulse zone 30 8.7 Signal-to-Noise Ratio (S/N) characteristic 30 Section 4. Requirements for an interchanged tape 9 Format 31 9.1 General 31 9.2 Basic Groups 31 9.2.1 Entity 32 9.2.2 Group Information Table
23、33 9.2.3 Block Access Table (BAT) 35 9.3 Sub-Groups 37 9.3.1 G1 Sub-Group 37 9.3.2 G2 Sub-Group randomizing 38 9.3.3 G3 Sub-Group 38 9.3.4 G4 Sub-Group 40 9.3.5 Main Data Block 44 9.4 Sub-Data Area 45 9.4.1 Pack item Number1 46 9.4.2 Pack item Number2 46 9.4.3 Pack item Number3 47 9.4.4 Pack item Nu
24、mber4 48 9.4.5 Pack item Number5 49 9.4.6 Pack item Number6 49 9.4.7 Pack item Number7 50ISO/IEC11557:1992 (E) BSI 03-2000 v Page 9.4.8 Pack item Number8 50 9.4.9 Sub Data Block 51 10 Method of recording 54 10.1 Physical recording density 54 10.2 Long-term average bit cell length 54 10.3 Short-term
25、average bit cell length 54 10.4 Rate of change 54 10.5 Bit shift 54 10.6 Read Signal Amplitude 54 10.7 Maximum recorded levels 54 11 Track geometry 54 11.1 Track configuration 54 11.2 Average track pitch 55 11.3 Variations of the track pitch 55 11.4 Track width 55 11.5 Track angle 56 11.6 Track edge
26、 linearity 56 11.7 Track length 56 11.8 Ideal tape centreline 56 11.9 Azimuth angles 56 12 Recording of blocks on the tape 56 12.1 Recorded Main Data Block 56 12.2 Recorded Sub Data Block 56 12.3 Margin Blocks, Preamble Blocks and Postamble Blocks 56 12.4 Spacer Blocks 56 13 Format of a track 56 13.
27、1 Track capacity 56 13.2 Positioning accuracy 57 13.3 Tracking scheme 57 14 Layout of a Single Data Space tape 60 14.1 Device Area 60 14.2 Reference Area 60 14.3 Position tolerance band No.1 61 14.4 System Area 61 14.5 Data Area 61 14.5.1 Vendor Group 61 14.5.2 Recorded Data Group 61 14.5.3 ECC3 62
28、14.5.4 Multiple recorded instances 62 14.5.5 Repeated frames 63 14.5.6 Appending and overwriting 63 14.6 EOD Area 64 14.7 Post-EOD Area 65 14.8 Early Warning Point EWP 65 14.9 Initialization 65 15 Layout of Partitioned tape 65 15.1 Overall magnetic tape layout 66 15.1.1 Device Area 66ISO/IEC11557:19
29、92 (E) vi BSI 03-2000 Page 15.1.2 Partition1 66 15.1.3 Partition0 67 15.2 Area ID 67 15.3 System Area Pack Items No.3 and No.4 67 15.4 Empty partitions 67 15.5 Initialization of Partitioned tapes 68 16 Housekeeping frames 68 16.1 Amble Frames 68 16.2 System Log Frames 68 16.3 Tape Management Frames
30、68 Annex A (normative) Measurement of the light transmittance of the prisms 69 Annex B (informative) Recognition holes 70 Annex C (informative) Means to open lid 70 Annex D (normative) Measurement of light transmittance of tape and leaders 72 Annex E (normative) Measurement of Signal to Noise Ratio
31、74 Annex F (normative) Method for determining the Nominal and the Maximum Allowable Recorded Levels 74 Annex G (normative) Representation of8-Bit bytes by10-bit patterns 75 Annex H (normative) Measurement of bit shift 82 Annex J (informative) Recommendations for transportation 84 Annex K (normative)
32、 Method of measuring track edge linearity 85 Annex L (informative) Read-After-Write 85 Annex M (informative) Example of the content of a Basic Group No.0 86 Annex N (informative) Registration of algorithms 86 Figure 1 Top view 16 Figure 2 Bottom view 16 Figure 3 Partial view of the rear side 16 Figu
33、re 4 Reference Planes X, Y, Z 16 Figure 5 Front side, lid closed 17 Figure 6 Top side, lid closed 17 Figure 7 Left side, lid closed 17 Figure 8 Top side, lid open 18 Figure 9 Left side, lid open 18 Figure 10 Bottom side, lid closed 19 Figure 11 Bottom side, lid open 20 Figure 12 Inside view of the l
34、ower half 21 Figure 13 Bottom side, lid and slider in open position 22 Figure 14 Left side, lid open 22 Figure 15 Top view of a hub 23 Figure 16 Side view of a hub 23 Figure 17 Interface with the drive spindle 23 Figure 18 Lid in completely open position 24 Figure 19 Extreme position of the lid for
35、which the hubs are still locked 24 Figure 20 Minimum position of the lid for which the hubs are completely unlocked 25 Figure 21 Top side, label area 25 Figure 22 Rear side, label area 25ISO/IEC11557:1992 (E) BSI 03-2000 vii Page Figure 23 Setup for measuring coating adhesion 27 Figure 24 Setup for
36、measuring the electrical resistance 28 Figure 25 Structure of a Basic Group 31 Figure 26 Block Access Table 35 Figure 27 G1 Sub-Groups 37 Figure 28 Shift register 38 Figure 29 G3 Sub-Group 39 Figure 30 Twin arrays of a G4 Sub-Group before C1 and C2 computation 41 Figure 31 W1 byte 44 Figure 32 W2 by
37、te 44 Figure 33 Main data block 45 Figure 34 Pack Item Number1 46 Figure 35 Pack Item Number2 46 Figure 36 Pack Item Number3 47 Figure 37 Pack Item Number4 48 Figure 38 Pack Item Number5 49 Figure 39 Pack Item Number6 49 Figure 40 Pack Item Number7 50 Figure 41 Pack Item Number8 50 Figure 42 SW1 byt
38、e 51 Figure 43 SW2 byte 52 Figure 44 Sub Data Block 52 Figure 45 Track configuration (view on recording surface) 55 Figure 46 ATF signals allocation 59 Figure 47 Layout of a Single Data Space tape 60 Figure 48 Appending rules 63 Figure 49 Tolerance on seamless appending 64 Figure 50 Layout of a part
39、itioned tape 66 Figure A.1 Reference prism 69 Figure A.2 Cartridge prism 69 Figure A.3 Perspective view of the reference prism 70 Figure C.1 Bottom side of the case 71 Figure C.2 Intermediate position within the drive 71 Figure C.3 Final position within the drive 71 Figure D.1 Optical arrangement 73
40、 Figure D.2 Measuring circuitry 73 Figure K.1 Track edge linearity 85 Figure M.1 Example of a Basic Group No.0 86 Table 1 Group Information Table 33 Table 2 Valid Sequences of Entries in the Block Access Table 37 Table 3 Pack Item location 53 Table 4 Format of a track 57 Table B.1 Recognition holes
41、70ISO/IEC11557:1992 (E) viii BSI 03-2000 Foreword ISO (the International Organization for Standardization) and IEC (theInternational Electrotechnical Commission) form the specialized system forworldwide standardization. National bodies that are members of ISO or IEC participate in the development of
42、 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 l
43、iaison 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 JTC1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an
44、International Standard requires approval by at least75% of the national bodies casting a vote. International Standard ISO/IEC11557 was prepared by the European Computer Manufacturers Association (as Standard ECMA-150) and was adopted, under a special “fast-track procedure”, by Joint Technical Commit
45、tee ISO/IEC JTC1, Information technology, in parallel with its approval by national bodies of ISO and IEC. Annex A,Annex D toAnnex H andAnnex K form an integral part of this International Standard. Annex B,Annex C,Annex J,Annex L toAnnex N are for information only. Patents During the preparation of
46、the ECMA standard, information was gathered on patents upon which application of the standard might depend. Relevant patents were identified as belonging to Hewlett Packard Limited and the Sony Corporation. However, neither ECMA, nor ISO/IEC can give authoritative or comprehensive information about
47、evidence, validity or scope of patent and like rights. The patent holders have stated that licences will be granted under reasonable and non-discriminatory terms. Communications on this subject should be addressed to Hewlett-Packard Limited Computer Peripherals Bristol Filton Road Stoke Gifford Bris
48、tol BS126QZ UnitedKingdom Sony Corporation Licensing and Trademark Division 6-7-35 Kitashinagawa Shinagawa-ku Tokyo141 JapanISO/IEC11557:1992 (E) BSI 03-2000 1 Introduction This International Standard ISO/IEC11557 incorporates all the specifications of ISO/IEC10777, together with extensions and modi
49、fications which specify the additional features of the DDS-DC recorded format. The specifications of the tape, cartridge, recorded signal, recording method and most of the recorded format are identical with those in ISO/IEC10777. This International Standard specifies two types of tape cartridge. For type A, the magnetic tape has a nominal thickness of134m. For type B, the magnetic tape has a nominal thickness of94m. It is not intende
