BS ISO IEC 11321-1993 Information technology - 3 81 mm wide magnetic tape cartridge for information interchange - Helical scan recording - DATA DAT format《信息技术 信息交换用3 81mm.pdf

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1、BRITISH STANDARD BS ISO/IEC 11321:1992 Implementation of ISO/IEC11321:1992 Information technology 3,81mmwide magnetic tape cartridge for information interchange Helical scan recording DATA/DAT format UDC 681.327.636BSISO/IEC11321:1992 This BritishStandard, having been prepared under the directionof

2、the Information Systems Technology StandardsPolicy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15April1993 BSI03-2000 The following BSI references relate to the work on this standard: Committee reference IST/4 Draft for comment 91/62466 DC ISBN 0 580 217

3、69 8 Committees responsible for this BritishStandard The preparation of this BritishStandard was entrusted by the Information Systems Technology Standards Policy Committee (IST/-) to Technical Committee IST/4, upon which the following bodies were represented: ICI Imagedata Institution of Electrical

4、Engineers International Computers Limited Kodak Limited Amendments issued since publication Amd. No. Date CommentsBSISO/IEC11321:1992 BSI 03-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword ix Text of ISO/IEC11321 1BSISO/IEC11321:1992 ii BSI 03-2000 Nation

5、al foreword This BritishStandard reproduces verbatim ISO/IEC11321:1992 and implements it as the UK national standard. This BritishStandard is published under the direction of the Information Systems Technology Standards Policy Committee whose Technical Committee IST/4 has the responsibility to: aid

6、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 them in the UK. NOTEInternational and European Standar

7、ds, as well as overseas standards, are available from BSI Sales Department, BSI, Linford Wood, Milton Keynes, MK146LE. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with

8、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, pagesii tox, pages1 to108 and a back cover. This standard has been updated (see copyright date) and may ha

9、ve had amendments incorporated. This will be indicated in the amendment table on the inside front cover.ISO/IEC11321:1992(E) ii BSI 03-2000 Contents Page Foreword ix Section1. General 1 Scope 1 2 Conformance 1 2.1 Magnetic tape cartridge 1 2.2 Generating system 1 2.3 Receiving system 1 3 Normative r

10、eferences 1 4 Definitions 1 4.1 Absolute Frame Number (AFN) 1 4.2 AC erase 1 4.3 Area ID 1 4.4 Automatic Track Finding (ATF) 1 4.5 Average Signal Amplitude 1 4.6 azimuth 2 4.7 back surface 2 4.8 byte 2 4.9 cartridge 2 4.10 Channel bit 2 4.11 Data Format ID 2 4.12 End of Data (EOD) 2 4.13 End of Info

11、rmation (EOI) 2 4.14 End of Partition (EOP) 2 4.15 Error Correcting Code (ECC) 2 4.16 flux transition position 2 4.17 flux transition spacing 2 4.18 frame 2 4.19 group 3 4.20 Logical Beginning of Tape (LBOT) 3 4.21 Logical End of Tape (LEOT) 3 4.22 magnetic tape 3 4.23 Master reference 3 4.24 Master

12、 Standard Amplitude Calibration Tape 3 4.25 Master Standard Reference Tape 3 4.26 optimum recording field 3 4.27 partition 3 4.28 partition reference 3 4.29 Physical Beginning of Tape (PBOT) 3 4.30 Physical End of Tape (PEOT) 3 4.31 physical recording density 3 4.32 pre-recording condition (maximum

13、recorded levels) 4 4.33 record 4 4.34 Reference Recording Field 4 4.35 Secondary Standard Amplitude Calibration Tape 4 4.36 Secondary Standard Reference Tape 4 4.37 separator 4 4.38 Standard Reference Amplitude 4 4.39 tape noise amplitude 4 4.40 Tape Reference Edge 4 4.41 track 4ISO/IEC11321:1992(E)

14、 BSI 03-2000 iii Page 5 Environment and safety 4 5.1 Testing environment 4 5.2 Operating environment 5 5.3 Storage environment 5 5.4 Transportation 5 5.5 Safety 5 5.6 Flammability 5 Section2. Requirements for the case 6 Dimensional and mechanical characteristics of the case 5 6.1 General 5 6.2 Overa

15、ll dimensions (Figure 6 and Figure7) 6 6.3 Loading grip (Figure 6) 6 6.4 Holding areas (Figure 6) 6 6.5 Notches of the lid (Figure 5 and Figure 8) 6 6.6 Lid dimensions (Figure 6 to Figure 8) 7 6.7 Optical detection of the beginning and end of tape (Figure9 and Figure 12) 7 6.8 Bottom side (Figure 10

16、 and Figure 11) 8 6.8.1 Locking mechanism of the slider 8 6.8.2 Access holes 8 6.8.3 Recognition, sub-datum and write-inhibit holes 9 6.8.4 Datum holes 10 6.8.5 Access room for tape guides 10 6.8.6 Holes for accessing the hubs 11 6.8.7 Internal structure of the lower half (Figure 12) 11 6.8.8 Light

17、path (Figure 12) 12 6.8.9 Support areas (Figure 13) 12 6.8.10 Datum areas (Figure 13) 12 6.8.11 Relationship between support and Datum Areas and Reference Plane Z (Figure 14) 12 6.9 Hubs (Figure 15, Figure 16) 13 6.10 Leader and trailer attachment 13 6.11 Interface between the hubs and the drive spi

18、ndles (Figure 17) 13 6.12 Opening of the lid (Figure 18) 13 6.13 Release of the hub locking mechanism (Figure 19, Figure 20) 14 6.14 Label area (Figure 21, Figure 22) 14 Section3. Requirements for the unrecorded tape 7 Mechanical, physical and dimensional characteristics of the tape 24 7.1 Materials

19、 24 7.2 Tape length 24 7.2.1 Length of magnetic tape 24 7.2.2 Length of leader and trailer tapes 24 7.3 Tape width 25 7.4 Discontinuities 25 7.5 Total thickness 25 7.6 Longitudinal curvature 25 7.7 Cupping 25 7.8 Coating adhesion 25ISO/IEC11321:1992(E) iv BSI 03-2000 Page 7.9 Layer-to-layer adhesion

20、 26 7.10 Tensile strength 26 7.10.1 Breaking strength 26 7.10.2 Yield strength 26 7.11 Residual elongation 26 7.12 Electrical resistance of coated surfaces 26 7.13 Light transmittance of tape 27 8 Magnetic recording characteristics 27 8.1 Optimum recording field 28 8.2 Signal Amplitude 28 8.3 Resolu

21、tion 28 8.4 Overwrite 28 8.4.1 Physical Recording Densities of750,6 and3002ftpmm 28 8.4.2 Physical recording densities of83,4ftpmm and1001ftpmm 28 8.5 Ease of erasure 29 8.6 Tape quality 29 8.6.1 Missing pulses 29 8.6.2 Missing pulse zone 29 8.7 Signal-to-noise ratio (S/N) characteristic 29 Section4

22、. Format 9 DATA/DAT format 29 9.1 General 29 9.2 Basic Groups 30 9.2.1 Basic Groups for Group Format0 30 9.2.2 Basic Groups for Group Format1 31 9.3 Sub-Groups 32 9.3.1 G1 Sub-group 32 9.3.2 G2 Sub-group 33 9.3.3 G3 Sub-group 33 9.3.4 G4 Sub-group 35 9.3.5 Main Data Block 39 9.4 Sub-Data area 40 9.4

23、.1 Pack Item No.1 41 9.4.2 Pack Item No.2 41 9.4.3 Pack Item No.3 43 9.4.4 Pack Item No.4 43 9.4.5 Pack Item No.5 44 9.4.6 Pack Item No.6 44 9.4.7 Pack Item No.7 45 9.4.8 Sub Data Block 45 9.5 Basic Group structure 47 9.5.1 User Data 48 9.5.2 System Data 48 9.5.3 Record ID list 52 9.5.4 Heuristic Re

24、covery Data Area 54 10 Method of recording 55 10.1 Physical recording density 55 10.2 Long-Term average bit cell length 55ISO/IEC11321:1992(E) BSI 03-2000 v Page 10.3 Short-Term average bit cell length 55 10.4 Rate of change 55 10.5 Bit shift 55 10.6 Read signal amplitude 55 10.7 Maximum recorded le

25、vels 55 11 Track geometry 55 11.1 Track configuration 55 11.2 Average track pitch 56 11.3 Variations of the track pitch 56 11.4 Track width 56 11.5 Track angle 56 11.6 Track edge linearity 57 11.7 Track length 57 11.8 Ideal tape centreline 57 11.9 Azimuth angles 57 12 Recording of blocks on the tape

26、 57 12.1 Recorded Main Data Block 57 12.2 Recorded Sub Data Block 57 12.3 Margin Blocks, Preamble Blocks and Postamble Blocks 57 12.4 Spacer Blocks 57 13 Format of a track 57 13.1 Track capacity 57 13.2 Positioning accuracy 58 13.3 Tracking scheme 58 14 Group Formats 60 14.1 Group Format0 60 14.2 Gr

27、oup Format1 60 14.3 Extended Gap Frames 61 14.3.1 Extended Leading Gap Frames 61 14.3.2 Extended Trailing Gap Frames 61 14.4 Types of Groups 61 14.4.1 Normal Groups 61 14.4.2 Spare Groups 62 14.4.3 Amble Groups 62 14.4.4 Header Groups 62 15 Magnetic tape layout 62 15.1 Load/Unload Area 63 15.2 Lead-

28、in Area 63 15.2.1 Preamble 64 15.2.2 Header 64 15.2.3 Format Parameter Set 65 15.2.4 Master Reference 69 15.2.5 Postamble 74 15.3 Partition 74 15.3.1 Partition Preamble 74 15.3.2 Partition Reference 75 15.3.3 Partition Postamble 84 15.3.4 Partition Data 85 15.3.5 End of Partition (EOP) 85ISO/IEC1132

29、1:1992(E) vi BSI 03-2000 Page 15.3.6 Unused Area 85 15.4 EOI 86 15.5 Repeated Groups 86 15.6 Repeated Frames within a Normal Group 86 15.7 Relocation of Defective Groups 86 15.8 Appending 86 15.8.1 Seamless appending 87 15.8.2 Non-seamless appending 88 15.9 Overwrite (Figure 83) 89 15.9.1 Overlapped

30、 track width 90 15.9.2 Non-overlapped track width 90 15.9.3 Rules for overwrite 90 Annex A (normative) Measurement of the light transmittance of the prisms 91 Annex B (informative) Recognition Holes 92 Annex C (informative) Means for opening the lid 93 Annex D (normative) Measurement of light transm

31、ittance of tape and leaders 94 Annex E (normative) Measurement of Signal-to-Noise Ratio 96 Annex F (normative) Method for determining the nominal and themaximumallowable recorded levels 96 Annex G (normative) Representation of8-bit bytes by10-bit pattern 97 Annex H (normative) Measurement of bit shi

32、ft 102 Annex J (informative) Recommendations for transportation 104 Annex K (normative) Method of measuring track edge linearity 105 Annex L (informative) Read-After-Write 106 Annex M (normative) Data allocation and C3 parity 106 Figure 1 Top view 15 Figure 2 Bottom view 15 Figure 3 Partial view of

33、the rear side 15 Figure 4 Reference Planes X, Y, Z 15 Figure 5 Front side, lid closed 16 Figure 6 Top side, lid closed 16 Figure 7 Left side, lid closed 16 Figure 8 Top side, lid open 17 Figure 9 Left side, lid open 17 Figure 10 Bottom side, lid closed 18 Figure 11 Bottom side, lid open 19 Figure 12

34、 Inside view of the lower halt 20 Figure 13 Bottom side, lid and slider in open position 21 Figure 14 Left side, lid open 21 Figure 15 Top view of a hub 22 Figure 16 Side view of a hub 22 Figure 17 Interface with the drive spindle 22 Figure 18 Lid in completely open position 23 Figure 19 Extreme pos

35、ition of the lid for which the hubs are still locked 23 Figure 20 Minimum position of the lid for which the hubs are completelyunlocked 23 Figure 21 Top side, label area 24 Figure 22 Rear side, label area 24ISO/IEC11321:1992(E) BSI 03-2000 vii Page Figure 23 Setup for measuring coating adhesion 25 F

36、igure 24 Setup for measuring the electrical resistance 27 Figure 25 Data allocation for Group Format0 30 Figure 26 Sub-group allocation Group Format0 31 Figure 27 Data allocation for Group Format1 31 Figure 28 Sub-group allocation for Group Format1 32 Figure 29 G1 Sub-groups for Group Format0 32 Fig

37、ure 30 G1 Sub-groups for Group Format1 33 Figure 31 G3 Sub-group 34 Figure 32 Twin arrays of a G4 Sub-group before C1 and C2 computation 36 Figure 33 W1 byte 39 Figure 34 W2- byte 39 Figure 35 Main data block 40 Figure 36 Pack Item No.1 41 Figure 37 Pack Item No.2 41 Figure 38 Area Codes 42 Figure 3

38、9 Pack Item No.3 43 Figure 40 Pack Item No.4 43 Figure 41 Pack Item No.5 44 Figure 42 Pack Item No.6 44 Figure 43 Pack Item No.7 45 Figure 44 SW1 Byte 46 Figure 45 SW2 Byte 46 Figure 46 Sub Data Block 47 Figure 47 Pack Item location 47 Figure 48 Basic Group Layout 48 Figure 49 Record layout in User

39、Data 48 Figure 50 Group Status Byte 50 Figure 51 Record ID Format 52 Figure 52 Control Byte for Data Records 53 Figure 53 Control Byte for Continuation Marks 54 Figure 54 Control Byte for Separators1,2 and3 54 Figure 55 Track configuration (view on the recording surface) 56 Figure 56 ATF Signals All

40、ocation 59 Figure 57 Group Format0 60 Figure 58 Group Format1 61 Figure 59 Tape Format 63 Figure 60 Load/Unload Area 63 Figure 61 Lead-in Area 63 Figure 62 Checksum procedure 68 Figure 63 Checksum summary 69 Figure 64 Tape Protection Byte 70 Figure 65 Tape Flag 71 Figure 66 Partition Protection Byte

41、 73 Figure 67 Partition Flags 74 Figure 68 Partition Organization 74 Figure 69 Spare Group Sets and Normal Group Sets 77 Figure 70 Type A Group Entry 78ISO/IEC11321:1992(E) viii BSI 03-2000 Page Figure 71 First Flag Byte for Type A 78 Figure 72 Second Flag Byte for Type A 79 Figure 73 Type B Group E

42、ntry 80 Figure 74 First Flag Byte for Type B 80 Figure 75 Second Flag Byte for Type B 81 Figure 76 Consecutive Separator twos Count 82 Figure 77 Type C Group Entry 83 Figure 78 First Flags Byte for Type C 83 Figure 79 Second Flag Byte for Type C 84 Figure 80 Seamless appending rules 87 Figure 81 Tol

43、erance for seamless appending 88 Figure 82 Non-seamless appending 89 Figure 83 Track configuration after overwrite 89 Figure A.1 Reference prism 91 Figure A.2 Cartridge prism 92 Figure A.3 Perspective view of the reference prism 92 Figure C.1 Bottom side of the case 93 Figure C.2 Intermediate positi

44、on within the drive 93 Figure C.3 Final position within the drive 93 Figure D.1 Optical arrangement 95 Figure D.2 Measuring circuitry 95 Figure K.1 Track edge linearity 105 Table 1 Group ID 49 Table 2 Record length code 50 Table 3 New Group Number 51 Table 4 Record ID list 52 Table 5 Format of a Tra

45、ck 58 Table 6 Data of a Header Group 64 Table 7 Data of a Header Group Example1 64 Table 8 Data of a Header Group Example2 64 Table 9 Format Parameter Set 65 Table 10 Information Data of the Master Reference Group 69 Table 11 Taw ID 70 Table 12 Partition Entry List 72 Table 13 Partition Entry 72 Tab

46、le 14 Partition Reference 75 Table 15 Partition ID 75 Table 16 Group Entry List Descriptor 77 Table 17 Record Type 77 Table 18 Group Entry List 78 Table B.1 Recognition holes 92 Descriptors: Data processing, information interchange, data recording, data recording devices, magnetic recording, magneti

47、c tapes, magnetic tape cartridges, specifications, formats, interchangeability.ISO/IEC11321:1992(E) BSI 03-2000 ix Foreword ISO (the International Organization for Standardization) and IEC (theInternational Electrotechnical Commission) form the specialized system for worldwide standardization. Natio

48、nal 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.

49、 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 JTC1. Draft International Standards adopted by the joint technical committee are circulated to national bodies