BS ISO IEC 11559-1993 Information technology - Data interchange on 12 7 mm wide 18-track magnetic tape cartridges - Extended format《信息技术 12 7 mm18磁道宽磁带盒上的数据交换 扩展格式》.pdf

1、BRITISH STANDARD BS ISO/IEC 11559:1993 Implementation of ISO/IEC 11559:1993 Information technology Data interchange on 12,7 mm wide 18-track magnetic tape cartridges Extended format UDC 681.327.636BSISO/IEC11559:1993 This British Standard, having been prepared under the directionof the Information S

2、ystems Technology Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15November1993 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference IST/4 Draft for comment 91/65328 DC ISBN 0 580 22650 6 Comm

3、ittees responsible for this British Standard The preparation of this British Standard was entrusted by the Information Systems Technology Standards Policy Committee (IST/-) to Technical Committee IST/4, upon which the following bodies were represented: British Computer Society ICI Imagedata Institut

4、ion of Electrical Engineers International Computers Limited Kodak Limited Amendments issued since publication Amd. No. Date CommentsBSISO/IEC11559:1993 BSI 01-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword vii Text of ISO/IEC 11559 1BSISO/IEC11559:1993 i

5、i BSI 01-2000 National foreword This British Standard reproduces verbatim ISO/IEC 11559:1993 and implements it as the UK national standard. This British Standard is published under the direction of the Information Systems Technology Standards Policy Committee whose Technical Committee IST/4 has the

6、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 them in the UK. NOTEInternation

7、al and European Standards, as well as overseas standards, are available from Customer Services, Publications, 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 responsible for their co

8、rrect 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, pagesii toviii, pages1 to58 and a back cover. This standard has been up

9、dated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.ISO/IEC11559:1993(E) ii BSI 01-2000 Contents Page Foreword vii Introduction 1 Section 1. General 1 1 Scope 1 2 Conformance 1 2.1 Magnetic tape cartridge 1 2.2

10、Generating system 1 2.3 Receiving system 1 3 Normative references 2 4 Definitions 2 4.1 algorithm 2 4.2 Average Signal Amplitude 2 4.3 back surface 2 4.4 Beginning of Tape (BOT) 2 4.5 byte 2 4.6 cartridge 2 4.7 Cyclic Redundancy Check Character 2 4.8 Data Block 2 4.9 Data Records 3 4.9.1 Processed D

11、ata Record (PDR) 3 4.9.2 Host Data Record 3 4.9.3 Logical Data Record (LDR) 3 4.9.4 User Data Record (UDR) 3 4.10 Error Correcting Code 3 4.11 flux transition position 3 4.12 flux transition spacing 3 4.13 magnetic tape 3 4.14 Master Standard Reference Tape 3 4.15 Packet 3 4.16 Packet Identifier 3 4

12、.17 Packet Trailer 3 4.18 pad byte 3 4.19 physical recording density 4 4.20 Postamble 4 4.21 Preamble 4 4.22 Processed Data 4 4.23 processing 4 4.24 Reference Field 4 4.25 Secondary Standard Reference Tape 4 4.26 Standard Reference Amplitude (SRA) 4 4.27 Standard Reference Current 4 4.28 Test Record

13、ing Current 4 4.29 track 4 4.30 Typical Field 4 4.31 transformation 5 5 Conventions and notations 5 5.1 Representation of numbers 5 5.2 Names 5 5.3 Acronyms 5 6 Environment and safety 5ISO/IEC11559:1993(E) BSI 01-2000 iii Page 6.1 Cartridge/Tape testing environment 6 6.2 Cartridge operating environm

14、ent 6 6.3 Cartridge storage environment 6 6.4 Safety requirements 6 6.4.1 Safeness 6 6.4.2 Flammability 6 6.5 Transportation 6 Section 2. Characteristics of the tape 6 7 Characteristics of the tape 6 7.1 Material 6 7.2 Tape length 6 7.3 Tape width 6 7.4 Tape discontinuity 7 7.5 Total thickness of ta

15、pe 7 7.6 Base material thickness 7 7.7 Longitudinal curvature 7 7.8 Out-of-plane distortions 7 7.9 Cupping 7 7.10 Dynamic frictional characteristics 7 7.10.1 Frictional drag between the recording surface and the tape back surface 7 7.10.2 Frictional drag between the tape recording surface and ferrit

16、e after environmental cycling 8 7.11 Coating adhesion 8 7.12 Flexural rigidity 9 7.13 Electrical resistance of coated surfaces 9 7.14 Tape durability 10 7.15 Inhibitor tape 10 7.16 Tape abrasivity 10 7.17 Pre-recording condition 10 7.18 Magnetic recording characteristics 10 7.18.1 Typical Field 10 7

17、.18.2 Signal amplitude 10 7.18.3 Resolution 11 7.18.4 Overwrite 11 7.18.5 Narrow-band signal-to-noise ratio (NB-SNR) 11 7.19 Tape quality 12 7.19.1 Missing pulses 12 7.19.2 Missing pulse zones 12 7.19.3 Coincident missing pulse zones 12 Section 3. Cartridge 12 8 Dimensional and mechanical characteri

18、stics of the cartridge 12 8.1 Overall dimensions 13 8.2 Write-inhibit mechanism 13 8.3 Label area of the rear side 14 8.4 Label area of the top side 14 8.5 Case opening 14 8.6 Locating notches 15ISO/IEC11559:1993(E) iv BSI 01-2000 Page 8.7 Locating areas 15 8.8 Inside configuration of the case aroun

19、d the case opening 15 8.9 Other external dimensions of the case 15 8.10 Central window 15 8.11 Stacking ribs 16 8.12 Flexibility of the case 16 8.12.1 Requirements 16 8.12.2 Procedure 16 8.13 Tape reel 16 8.13.1 Locking mechanism 16 8.13.2 Axis of rotation of the reel 17 8.13.3 Metallic insert 17 8.

20、13.4 Toothed rim 17 8.13.5 Hub of the reel 17 8.13.6 Relative positions 18 8.13.7 Characteristics of the toothed rim 18 8.14 Leader block 18 8.15 Attachment of the tape to the header block 19 8.16 Latching mechanism 19 8.17 Tape wind 20 8.18 Wind tension 20 8.19 Circumference of the tape reel 21 8.2

21、0 Moment of inertia 21 Section 4. Recording method and formats 29 9 Method of recording 29 9.1 Physical recording density 29 9.2 Bit cell length 29 9.3 Average bit cell length 29 9.4 Long-term average bit cell length 29 9.5 Short-term average bit cell length (STA) 29 9.6 Rate of change 29 9.7 Bit sh

22、ift 29 9.8 Total character skew 29 9.9 Read signal amplitude 29 9.10 Coincident missing pulse zones 30 10 Track format 30 10.1 Number of tracks 30 10.2 Reference edge 30 10.3 Track positions 30 10.4 Track width 30 10.5 Azimuth 30 11 Packet format 31 11.1 Packet elements 31 11.2 Packet ID 31 11.3 UDR

23、 32 11.4 Packet Trailer 32 11.4.1 Packet Trailer when data has been processed 32 11.4.2 Packet Trailer when data has not been processed 32 12 Data Block format 33ISO/IEC11559:1993(E) BSI 01-2000 v Page 12.1 Data Part 33 12.1.1 Packet Bytes 33 12.1.2 Count Field Bytes 33 12.1.3 Block-ID Bytes 33 12.2

24、 Allocation of Data Bytes to frames 34 12.2.1 Prefix Frames 35 12.2.2 Data Frames 35 12.2.3 Residual Frame 1 36 12.2.4 Residual Frame 2 36 12.2.5 Suffix Frames 38 12.3 Error Correcting Code (ECC) 38 12.3.1 Diagonal Redundancy Check (DRC) 39 12.3.2 Vertical Redundancy Check (VRC) 39 12.3.3 ECC Format

25、 39 12.3.4 Summary of ECC2) 40 12.4 Recording of 8-bit bytes on the tape 41 12.5 Recorded Data Block 41 12.5.1 Preamble 41 12.5.2 Beginning of Data Mark (BDM) 41 12.5.3 Resync Control Frame 41 12.5.4 End of Data Mark (EDM) 41 12.5.5 Postamble 42 12.6 Data Density 42 13 Tape format 42 13.1 Density Id

26、entification Burst 43 13.2 ID Separator Burst 43 13.3 Interblock Gaps 44 13.4 Erase Gaps 44 13.4.1 Normal Erase Gaps 44 13.4.2 Elongated Erase Gaps 44 13.5 Tape Marks 44 13.6 Relationship between Interblock Gaps, Erase Gaps and Tape Marks 45 13.6.1 Interblock Gap followed by a Tape Mark 45 13.6.2 Ta

27、pe Mark followed by an Interblock Gap 45 13.6.3 Interblock Gap followed by an Erase Gap 45 13.6.4 Erase Gap followed by an Interblock Gap 45 13.6.5 Summary of the relationship between Interblock Gaps, Erase Gaps and Tape Marks 46 13.7 First and last recording on the tape 46 13.8 Summary of the tape

28、format 47 13.9 Transform Change Records (TCRs) 48 Annex A (informative) Recommendations for transportation 49 Annex B (informative) Inhibitor tape 49 Annex C (normative) Tape abrasivity measurement procedure 50 Annex D (informative) Recommendations on tape durability 51 Annex E (normative) Pre-recor

29、ding condition 52 Annex F (normative) Representation of 8-bit bytes by 9-bit patterns 53 Annex G (normative) Measurement of bit shift 55ISO/IEC11559:1993(E) vi BSI 01-2000 Page Annex H (informative) Summary of data flow 57 Annex J (normative) Implementation of a CRC 58 Annex K (normative) Calculatio

30、n of a Physical Position Indicator 58 Figure 1 Coating adhesion 8 Figure 2 General view of cartridge 20 Figure 3 Front side of case 21 Figure 4 Top side of case 22 Figure 5 Rear side of case 22 Figure 6 Bottom side of case 23 Figure 7 Side of case 23 Figure 8 Enlarged view 24 Figure 9 Cross-section

31、of a location notch 24 Figure 10 Cross-section of a detail of the opening of case 25 Figure 11 Cross-section of the cartridge in hand 25 Figure 12 Cross-section of the cartridge in the drive 26 Figure 13 Teeth of the toothed rim 26 Figure 14 Cross-section of leader block 27 Figure 15 Fixation of tap

32、e to leader block 28 Figure 16 Leader block in case 28 Figure 17 Packet format 31 Figure 18 Data Part 33 Figure 19 Block-ID Bytes 33 Figure 20 Frame 34 Figure 21 Date Block 35 Figure 22 Data Frame 35 Figure 23 Residual Frame 1 36 Figure 24 Residual Frame 2 37 Figure 25 Summary of Error Correction Co

33、de 40 Figure 26 Recorded Data Block 41 Figure 27 Division of tracks in zones 43 Figure 28 Relationship between Gaps an Tape Marks 46 Figure 29 Characteristics of recording other than Recorded Data Blocks 47 Figure 30 Arrangement of recording on the tape 47 Figure C.1 Ferrite Wear Bar 50 Figure C.2 W

34、ear Bar Holding Fixture 51 Figure C.3 Typical Wear Pattern 51 Table 4 Requirements for Residual Frames 38 Descriptors: Data processing, information interchange, data recording, magnetic recording, data storage devices, magnetic tapes, magnetic tape cartridges, specifications, dimensions, formats, in

35、terchangeability.ISO/IEC11559:1993(E) BSI 01-2000 vii Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISOorIEC participate in the d

36、evelopment of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISOandIEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governm

37、ental, in liaison with ISOandIEC, also take part in the work. In the field of information technology, ISOandIEC have established a joint technical committee, ISO/IECJTC1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication

38、as an International Standard requires approval by at least75% of the national bodies casting a vote. International Standard ISO/IEC11559 was prepared by European Computer Manufacturers Associations (as ECMA-152) and was adopted, under a special “fast-track procedure”, by Joint Technical Committee IS

39、O/IECJTC1, Information technology, in parallel with its approval by national bodies of ISOandIEC. Annex C, Annex E, Annex F, Annex G and Annex K form an integral part of this International Standard. Annex A, Annex B, Annex D, Annex H and Annex J are for information only.viii blankISO/IEC11559:1993(E

40、) BSI 01-2000 1 Introduction ISO/IEC 11559 incorporates all the specifications of ISO9661, together with extensions and modifications which specify the additional features of an extended format that also allows higher capacities to be achieved. The specifications of the tape, cartridge, recorded sig

41、nal, recording method and most of the recorded format are identical with those in ISO9661. It is not intended that this International Standard replaces ISO9661. Existing drives and cartridges which conform to ISO9661 will continue to do so and will not conform to all requirements of this Internation

42、al Standard. Drives conforming to this International Standard will be able to write on, and read from, cartridges conforming to ISO9661. Section 1. General 1 Scope This International Standard specifies the physical and magnetic characteristics of a12,7mm wide, 18-track magnetic tape cartridge, to en

43、able interchangeability of such cartridges. It also specifies the quality of the recorded signals, the format and the recording method, thus allowing, together with ISO1001, full data interchange by means of such magnetic tape cartridges. The cartridge and recording method are identical with those d

44、escribed in ISO9661. This International Standard specifies extensions to the transformation of data before it is formatted as in ISO9661. These extensions specify a method for increasing the utilization of the tape by combining smaller blocks of data into extended blocks; specify a method for identi

45、fying whether the recorded data has been processed and, if it has been processed, the algorithm used for processing; specify a method for including recorded data blocks conforming to this International Standard and recorded data blocks conforming to ISO9661 on the same tape. The permissible routes f

46、or the flow of data are shown inAnnex H. 2 Conformance 2.1 Magnetic tape cartridge A magnetic tape cartridge shall be in conformance with this International Standard if the cartridge meets all the requirements of clauses4 and6 to8; the recording on the tape meets the requirements of clauses9 to13; f

47、or each recorded packet the algorithm used for processing the data therein, if processed data has been recorded, has (have) been registered and the registered identification is included in Byte13 of the Packet ID Block of this packet (see11.2). NOTE 1If the algorithm has not been registered Byte 13

48、shall be set to (FF). 2.2 Generating system A system generating a magnetic tape cartridge for interchange shall be entitled to claim conformance with this International Standard if all the recordings that it makes on a tape meet the mandatory requirements of this International Standard. A claim of c

49、onformance shall state whether or not one, or more, registered algorithms are implemented and, if so, the registered number(s) of all implemented algorithm(s). 2.3 Receiving system A system receiving a magnetic tape cartridge for interchange shall be entitled to claim conformance with this International Standard if it is able to handle any recording made on the tape according to this International Standard. In particular it shall be able to recognize the occurrence of extended blocks