1、Reference number ISO/IEC 16382:2000(E) ISO/IEC 2000 INTERNATIONAL STANDARD ISO/IEC 16382 First edition 2000-05-15 Information technology Data interchange on 12,7 mm 208-track magnetic tape cartridges DLT 6 format Technologies de linformation change de donnes sur cartouches de bande magntique de 12,7
2、 mm 208 pistes Format DLT 6ISO/IEC 16382:2000(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 licensed to and installed on the computer p
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5、al 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, without permission in writing from either IS
6、O 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 rights reservedISO/IEC 16382:2000(E) ISO/IE
7、C 2000 All rights reserved iii Contents Section 1 - General 1 1 Scope 1 2 Conformance 1 2.1 Magnetic tape cartridges 1 2.2 Generating systems 1 2.3 Receiving systems 1 3 Normative references 1 4 Terms and definitions 1 4.1 Average Signal Amplitude 1 4.2 azimuth 2 4.3 back surface 2 4.4 Beginning-Of-
8、Tape marker (BOT) 2 4.5 block 2 4.6 byte 2 4.7 cartridge 2 4.8 Cyclic Redundancy Check (CRC) character 2 4.9 Early Warning (EW) 2 4.10 Error-Detecting Code (EDC) 2 4.11 End-Of-Tape marker (EOT) 2 4.12 Entity 2 4.13 Error-Correcting Code (ECC) 2 4.14 Envelope 2 4.15 Envelope size 2 4.16 flux transiti
9、on position 2 4.17 flux transition spacing 2 4.18 Group Record 2 4.19 logical track 2 4.20 magnetic tape 2 4.21 Master Standard Reference Tape 2 4.22 object 2 4.23 page 2 4.24 physical recording density 2 4.25 physical track 2 4.26 Record 2 4.27 Reference Edge 2 4.28 Reference Field 2 4.29 Secondary
10、 Standard Reference Tape 2 4.30 Standard Reference Amplitude (SRA) 3 4.31 Standard Reference Current 3 4.32 Test Recording Current 3 4.33 Typical Field 3 5 Conventions and notations 3 5.1 Representation of numbers 3 5.2 Dimensions 3 5.3 Names 3 5.4 Acronyms 3ISO/IEC 16382:2000(E) iv ISO/IEC 2000 All
11、 rights reserved 6 Environment and safety 3 6.1 Cartridge and tape testing environment 4 6.2 Cartridge operating environment 4 6.3 Cartridge storage environment 4 6.4 Safety 4 6.4.1 Safeness 4 6.4.2 Flammability 4 6.5 Transportation 4 Section 2 - Requirements for the unrecorded tape 4 7 Mechanical a
12、nd electrical requirements 4 7.1 Material 4 7.2 Tape length 4 7.3 Width 4 7.4 Total thickness 5 7.5 Discontinuity 5 7.6 Longitudinal curvature 5 7.6.1 Requirement 5 7.6.2 Procedure 5 7.7 Out-of-Plane distortions 5 7.8 Cupping 5 7.9 Roughness of the coating surfaces 5 7.9.1 Roughness of the back coat
13、ing surface 5 7.9.2 Roughness of the magnetic coating surface 5 7.10 Coating adhesion 5 7.11 Layer-to-layer adhesion 6 7.11.1 Requirements 6 7.11.2 Procedure 6 7.12 Modulus of elasticity 7 7.12.1 Requirement 7 7.12.2 Procedure 7 7.13 Flexural rigidity 7 7.13.1 Requirement 7 7.13.2 Procedure 7 7.14 T
14、ensile yield force 7 7.14.1 Procedure 8 7.15 Electrical resistance 8 7.15.1 Requirement 8 7.15.2 Procedure 8 7.16 Inhibitor tape 8 7.17 Abrasivity 8 7.17.1 Requirement 8 7.17.2 Procedure 8 7.18 Light transmittance of the tape and the leader 9 7.19 Coefficient of dynamic friction 9 7.19.1 Requirement
15、s 9 7.19.2 Procedure for the measurement of the friction between the magnetic surface and the back surface 9 7.19.3 Procedure for the measurement of the friction between the magnetic surface or the back surface and calcium titanate ceramic 10ISO/IEC 16382:2000(E) ISO/IEC 2000 All rights reserved v 8
16、 Magnetic recording characteristics 10 8.1 Typical Field 10 8.2 Signal amplitude 11 8.3 Resolution 11 8.4 Overwrite 11 8.4.1 Requirement 11 8.5 Peak shift 11 8.5.1 Requirement 11 8.5.2 Procedure 11 9 Tape quality 12 9.1 Missing pulses 12 9.1.1 Requirement 12 9.2 Missing pulse zone 12 9.2.1 Requireme
17、nt 12 9.3 Tape durability 12 Section 3 - Mechanical specifications of the tape cartridge 12 10 General 12 10.1 Bottom side and right side 13 10.2 Back side and left side 14 10.3 Tape reel 14 10.4 Tape leader 15 10.5 Front side 16 10.6 Operation of the cartridge 16 10.7 Tape winding 17 10.8 Moment of
18、 inertia 17 10.9 Material 18 Section 4 - Requirements for an interchanged tape 27 11 Method of recording 27 11.1 Physical recording density 27 11.2 Channel bit cell length 27 11.2.1 Average Channel bit cell length 27 11.2.2 Long-term average Channel bit cell length 27 11.2.3 Short-term average Chann
19、el bit cell length 27 11.3 Flux transition spacing 27 11.4 Read signal amplitude 27 11.5 Azimuth 28 11.6 Channel skew 28 12 Tape format 28 12.1 Reference Edge 28 12.2 Direction of recording 28 12.3 Tape layout 28 12.4 Calibration and Directory Area 28 12.4.1 Scratch Area 29 12.4.2 Guard Area G1 29 1
20、2.4.3 Calibration Tracks Area 29 12.4.4 Guard Area G2 30 12.4.5 Directory Area 30 12.4.6 Guard Area G3 30 12.5 Data Area 30 12.5.1 Physical tracks 31 12.5.2 Logical tracks 32ISO/IEC 16382:2000(E) vi ISO/IEC 2000 All rights reserved 13 Data format 34 13.1 Data Bytes 34 13.2 Data Blocks 34 13.3 Types
21、of Blocks 34 13.4 Entities 34 13.5 Envelopes 34 13.6 Block format 34 13.6.1 Preamble 35 13.6.2 Sync 35 13.6.3 Data Field 35 13.6.4 EDC 36 13.6.5 Control Field 1 (CF1) 37 13.6.6 Control Field 2 (CF2) 38 13.6.7 CRC 39 13.6.8 Postamble 39 14 Use of blocks 39 14.1 Data Blocks 39 14.2 Filler Blocks 39 14
22、.3 End of Track Blocks (EOTR) 39 14.4 End of Data Blocks (EOD) 40 14.5 ECC Blocks 40 15 Format of Entities 40 16 Format of Envelopes 40 17 Error handling 40 Annexes A - Measurement of light transmittance 41 B - Generation of the Data Block CRCs 44 C - ECC generation 45 D - Generation of page CRCs 48
23、 E - Format of MAP entries 49 F - Format of Control Field 1 50 G - Format of Control Field 2 51 H - Recommendations for transportation 52 J - Inhibitor tape 53 K - Recommendations on tape durability 54 L - Handling guidelines 55ISO/IEC 16382:2000(E) ISO/IEC 2000 All rights reserved vii Foreword ISO
24、(the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committee
25、s 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 liaison with ISO and IEC, also take part in the work.
26、 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 established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circu
27、lated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO and IEC shal
28、l not be held responsible for identifying any or all such patent rights. This International Standard was prepared by ECMA (as Standard ECMA-286) and was adopted, under a special “fast-track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approval
29、by national bodies of ISO and IEC. Annexes A to G form a normative part of this International Standard. Annexes H to L are for information only.INTERNATIONAL STANDARD ISO/IEC 16382:2000(E) ISO/IEC 2000 All rights reserved 1 Information technology Data interchange on 12,7 mm 208-track magnetic tape c
30、artridges DLT 6 format Section 1 - General 1S c o p e This International Standard specifies the physical and magnetic characteristics of a 12,7 mm wide, 208-track magnetic tape cartridge, to enable physical interchangeability of such cartridges between drives. It also specifies the quality of the re
31、corded signals, a format - called Digital Linear Tape 6 (DLT 6) - and a recording method, thereby allowing data interchange between drives. Together with a labelling standard, for instance International Standard ISO 1001 for Magnetic Tape Labelling, it allows full data interchange by means of such m
32、agnetic tape cartridges. 2 Conformance 2.1 Magnetic tape cartridges A magnetic tape cartridge shall be in conformance with this International Standard if it satisfies all mandatory requirements of this Standard. The tape requirements shall be satisfied throughout the extent of the tape. 2.2 Generati
33、ng systems A system generating a magnetic tape cartridge for interchange shall be in conformance with this International Standard if all the recordings that it makes on a tape according to 2.1 meet the mandatory requirements of this International Standard. In addition, a claim of conformance shall s
34、tate whether or not one, or more registered algorithm(s) are implemented within the system, and are able to compress data received from the host prior to collecting the data into blocks, and the registered identification number(s) of the implemented compression algorithm(s). 2.3 Receiving systems A
35、system receiving a magnetic tape cartridge for interchange shall be in conformance with this International Standard if it is able to handle any recording made on a tape according to 2.1. In addition, it shall whether or not one, or more de-compression algorithm(s) are implemented within the system,
36、and are able to be applied to de-compress data prior to making such data available to the host, the registered identification number(s) of the implemented compression algorithm(s). 3 Normative references The following normative documents contain provisions which, through reference in this text, cons
37、titute 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 this International Standard are encouraged to investigate the possibility of applying the most recent edi
38、tions 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 valid International Standards. ISO 1001:1986, Information processing File structure and labelling of magn
39、etic tapes for information interchange. ISO 1302:1992, Technical drawings Method of indicating surface texture. ISO/IEC 11576:1994, Information technology Procedure for the registration of algorithms for the lossless compression of data. 4 Terms and definitions For the purposes of this International
40、 Standard, the following terms and definitions apply. 4.1 Average Signal Amplitude: The average peak-to-peak value of the output signal from the read head at the physical recording density of 2 578 ftpmm measured over a minimum length of track of 25,4 mm, exclusive of missing pulses.ISO/IEC 16382:20
41、00(E) 2 ISO/IEC 2000 All rights reserved 4.2 azimuth: The angular deviation, in degrees of arc, of the mean flux transition line of the recording made on a track f romal in en orm alt ot h eR ef e re n c eEdg e . 4.3 back surface: The surface of the tape opposite the magnetic coating which is used t
42、o record data. 4.4 Beginning-Of-Tape marker (BOT): A hole punched on the centreline of the tape towards the end nearest to the leader. 4.5 block: A set of contiguous bytes recorded on a physical track and considered as a unit. 4.6 byte: An ordered set of bits acted upon as a unit. NOTE - In this Int
43、ernational Standard, all bytes are 8-bit bytes. 4.7 cartridge: A case containing a single supply reel of 12,7 mm wide magnetic tape with a leader attached at the outer end. 4.8 Cyclic Redundancy Check (CRC) character: A 64-bit character, generated by a mathematical computation, used for error detect
44、ion. 4.9 Early Warning (EW): A signal generated by the drive indicating the approaching end of the recording area. 4.10 Error-Detecting Code (EDC): A mathematical computation yielding check bytes used for error detection. 4.11 End-Of-Tape marker (EOT): A hole punched on the centreline of the tape to
45、wards the end farthest from the leader. 4.12 Entity: A group of twenty blocks treated as a logical unit and recorded on a logical track, except Filler Blocks, if any. 4.13 Error-Correcting Code (ECC): A mathematical computation yielding check bytes used for the correction of errors detected by the C
46、RC and the EDC. 4.14 Envelope: A group of Entities. 4.15 Envelope size: The number of Entities in an Envelope. 4.16 flux transition position: The point which exhibits the maximum free-space flux density normal to the tape surface. 4.17 flux transition spacing: The distance on the magnetic tape betwe
47、en successive flux transitions. 4.18 Group Record: A Record consisting of a series of Records of equal size. 4.19 logical track: A group of four physical tracks that are written or read simultaneously. 4.20 magnetic tape: A tape that accepts and retains magnetic signals intended for input, output, a
48、nd storage purposes on computers and associated equipment. 4.21 Master Standard Reference Tape: A tape selected as the standard for Reference Field, signal amplitude, resolution, peakshift, and overwrite characteristics. NOTE - The Master Standard Reference Tape has been established by the Quantum C
49、orporation. 4.22 object: A Record or a page of type Tape Mark. 4.23 page: A logical division of a block. 4.24 physical recording density: The number of recorded flux transitions per unit length of track, expressed in flux transitions per millimetre (ftpmm). 4.25 physical track: A longitudinal area on the tape along which a series of magnetic signals can be recorded. 4.26 Record: A collection of User Bytes, the number of which is determined by the host. 4.27 Reference Edge: The bottom edge of the tape when viewing the mag
