ANSI INCITS ISO IEC 15896-1999 Information technology - Data interchange on 12 7 mm 208-track magnetic tape cartridges - DLT 5 format.pdf

1、 INCITS/ISO/IEC 15896:19992010 (ISO/IEC 15896:1999, IDT) Information technology - Data interchange on 12,7 mm 208-track magnetic tape cartridges - DLT 5 formatReaffirmed as INCITS/ISO/IEC 15896:1999 R2015INCITS/ISO/IEC 15896:19992010PDF disclaimerThis PDF file may contain embedded typefaces. In acco

2、rdance 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 performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes l

3、icensing policy. The ISO Central Secretariat accepts no liability in this area.Adobe is a trademark of Adobe Systems Incorporated.Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printi

4、ng. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.Adopted by INCITS (InterNational Committee for Information Technology Standar

5、ds) as an American National Standard.Date of ANSI Approval: 9/29/2010Published by American National Standards Institute, 25 West 43rd Street, New York, New York 10036Copyright 2010 by Information Technology Industry Council (ITI). All rights reserved.These materials are subject to copyright claims o

6、f 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, including an electronic ret

7、rieval 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 Americaii ITIC 2010 All rights reserved iiiContentsSection 1 - General 11 Scope 12 Conform

8、ance 12.1 Magnetic tape cartridges 12.2 Generating systems 12.3 Receiving systems 13 Normative references 14 Definitions 14.1 Average Signal Amplitude 24.2 azimuth 24.3 back surface 24.4 Beginning-Of-Tape marker (BOT) 24.5 block 24.6 byte 24.7 cartridge 24.8 Cyclic Redundancy Check (CRC) character 2

9、4.9 Early Warning (EW) 24.10 Error-Detecting Code (EDC) 24.11 End-Of-Tape marker (EOT) 24.12 Entity 24.13 Error-Correcting Code (ECC) 24.14 Envelope 24.15 Envelope size 24.16 flux transition position 24.17 flux transition spacing 24.18 logical track 24.19 magnetic tape 24.20 Master Standard Referenc

10、e Tape 24.21 object 24.22 page 24.23 physical recording density 24.24 physical track 24.25 Record 24.26 Reference Edge 24.27 Reference Field 24.28 Secondary Standard Reference Tape 24.29 Standard Reference Amplitude (SRA) 34.30 Standard Reference Current 3ISO/IEC ISO/IEC 15896:1999 (E)iv4.31 Test Re

11、cording Current 34.32 Typical Field 35 Conventions and notations 35.1 Representation of numbers 35.2 Dimensions 35.3 Names 35.4 Acronyms 36 Environment and safety 36.1 Cartridge and tape testing environment 36.2 Cartridge operating environment 46.3 Cartridge storage environment 46.4 Safety 46.4.1 Sa

12、feness 46.4.2 Flammability 46.5 Transportation 4Section 2 - Requirements for the unrecorded tape 57 Mechanical and electrical requirements 57.1 Material 57.2 Tape length 57.3 Width 57.4 Total thickness 57.5 Discontinuity 57.6 Longitudinal curvature 57.6.1 Requirement 57.6.2 Procedure 57.7 Out-of-Pla

13、ne distortions 57.8 Cupping 57.9 Roughness of the coating surfaces 57.9.1 Roughness of the back coating surface 57.9.2 Roughness of the magnetic coating surface 57.10 Coating adhesion 67.11 Layer-to-layer adhesion 67.11.1 Requirements 67.11.2 Procedure 67.12 Modulus of elasticity 77.12.1 Requirement

14、 77.12.2 Procedure 77.13 Flexural rigidity 77.13.1 Requirement 77.13.2 Procedure 77.14 Tensile yield force 87.14.1 Procedure 87.15 Electrical resistance 87.15.1 Requirement 87.15.2 Procedure 87.16 Inhibitor tape 97.17 Abrasivity 97.17.1 Requirement 97.17.2 Procedure 97.18 Light transmittance of the

15、tape and the leader 97.19 Coefficient of dynamic friction 97.19.1 Requirements 97.19.2 Procedure for the measurement of the friction between the magnetic surface and the back surface 10ISO/IEC 15896:1999 (E) ISO/IECv7.19.3 Procedure for the measurement of the friction between the magnetic surface or

16、 the back surface and calciumtitanate ceramic 108 Magnetic recording characteristics 108.1 Typical Field 118.2 Signal amplitude 118.3 Resolution 118.4 Overwrite 118.4.1 Requirement 118.5 Peak shift 118.5.1 Requirement 118.5.2 Procedure 119 Tape quality 129.1 Missing pulses 129.1.1 Requirement 129.2

17、Missing pulse zone 129.2.1 Requirement 129.3 Tape durability 12Section 3 - Mechanical specifications of the tape cartridge 1210 General 1210.1 Bottom side and right side 1310.2 Back side and left side 1410.3 Tape reel 1410.4 Tape leader 1510.5 Front side 1610.6 Operation of the cartridge 1610.7 Tape

18、 winding 1710.8 Moment of inertia 1710.9 Material 18Section 4 - Requirements for an interchanged tape 2711 Method of recording 2711.1 Physical recording density 2711.2 Channel bit cell length 2711.2.1 Average Channel bit cell length 2711.2.2 Long-term average Channel bit cell length 2711.2.3 Short-t

19、erm average Channel bit cell length 2711.3 Flux transition spacing 2711.4 Read signal amplitude 2711.5 Azimuth 2811.6 Channel skew 2812 Tape format 2812.1 Reference Edge 2812.2 Direction of recording 2812.3 Tape layout 2812.4 Calibration and Directory Area 2812.4.1 Scratch Area 2912.4.2 Guard Area G

20、1 2912.4.3 Calibration Tracks Area 2912.4.4 Guard Area G2 3012.4.5 Directory Area 3012.4.6 Guard Area G3 3012.5 Data Area 3012.5.1 Physical tracks 31ISO/IEC ISO/IEC 15896:1999 (E)vi12.5.2 Logical tracks 3313 Data format 3413.1 Data Bytes 3413.2 Data Blocks 3413.3 Types of Blocks 3413.4 Entities 3413

21、.5 Envelopes 3413.6 Block format 3413.6.1 Preamble 3513.6.2 Sync 3513.6.3 Data Field 3513.6.4 EDC 3613.6.5 Control Field 1 (CF1) 3713.6.6 Control Field 2 (CF2) 3813.6.7 CRC 3913.6.8 Postamble 3914 Use of blocks 3914.1 Data Blocks 3914.2 Filler Blocks 3914.3 End of Track Blocks (EOTR) 4014.4 End of D

22、ata Blocks (EOD) 4014.5 ECC Blocks 4015 Format of Entities 4016 Format of Envelopes 4017 Error handling 40AnnexesA - Measurement of light transmittance 41B - Generation of the Data Block CRCs 44C - ECC generation 45D - Generation of page CRCs 48E - Format of MAP entries 49F - Format of Control Field

23、 1 50G - Format of Control Field 2 51H - Recommendations for transportation 52J - Inhibitor tape 53K - Recommendations on tape durability 54L - Handling guidelines 55ISO/IEC 15896:1999 (E) ISO/IECISO/IEC ISO/IEC 15896:1999 (E)viiForewordISO (the International Organization for Standardization) and IE

24、C (the International Electrotechnical Commission)form the specialized system for worldwide standardization. National bodies that are members of ISO or IECparticipate in the development of International Standards through technical committees established by therespective organization to deal with part

25、icular fields of technical activity. ISO and IEC technical committeescollaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, inliaison with ISO and IEC, also take part in the work.International Standards are drafted in accordance with the rules

26、 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 circulated to national bodies for voting.Publication as an International

27、 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 ofpatent rights. ISO and IEC shall not be held responsible for identifying any or all such patent right

28、s.International Standard ISO/IEC 15896 was prepared by ECMA European association for standardizinginformation and communication systems (as ECMA-259) and was adopted, under a special “fast-track procedure”,by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its appro

29、val by nationalbodies of ISO and IEC.Annexes A to G form a normative part of this International Standard. Annexes H to L are for information only.viiiIntroductionThis International Standard constitutes a further development of the magnetic tape cartridge specified in International StandardISO/IEC 15

30、307. The number of tracks is raised to 208. As a result a native capacity of 35 Gbytes or, with compressed data, oftypically at least 70 Gbytes is achieved.ISO/IEC 15896:1999 (E) ISO/IECSection 1 - General1ScopeThis International Standard specifies the physical and magnetic characteristics of a 12,7

31、 mm wide, 208-track magnetic tapecartridge, to enable physical interchangeability of such cartridges between drives. It also specifies the quality of the recordedsignals, a format - called Digital Linear Tape 5 (DLT 5) - and a recording method, thereby allowing data interchange betweendrives. Togeth

32、er with a labelling standard, for instance International Standard ISO 1001 for Magnetic Tape Labelling, it allowsfull data interchange by means of such magnetic tape cartridges.2 Conformance2.1 Magnetic tape cartridgesA magnetic tape cartridge shall be in conformance with this International Standard

33、 if it satisfies all mandatory requirements ofthis Standard. The tape requirements shall be satisfied throughout the extent of the tape.2.2 Generating systemsA system generating a magnetic tape cartridge for interchange shall be in conformance with this International Standard if all therecordings th

34、at it makes on a tape according to 2.1 meet the mandatory requirements of this International Standard.In addition, a claim of conformance shall state whether or not one, or more registered algorithm(s) are implemented within the system, and are able to compress datareceived from the host prior to co

35、llecting the data into blocks, and the registered identification number(s) of the implemented compression algorithm(s) .2.3 Receiving systemsA system receiving a magnetic tape cartridge for interchange shall be in conformance with this International Standard if it isable to handle any recording made

36、 on a tape according to 2.1.In addition, it shall state whether or not one, or more de-compression algorithm(s) are implemented within the system, and are able to be applied tode-compress data prior to making such data available to the host, the registered identification number(s) of the implemented

37、 compression algorithm(s) .4 DefinitionsFor the purposes of this International Standard, the following definitions apply.INTERNATIONAL STANDARD ISO/IEC ISO/IEC 15896:1999(E)ISO/IEC 15896:1999 (E) ISO/IEC24.1 Average Signal Amplitude: The average peak-to-peak value of the output signal from the read

38、head at the physicalrecording density of 2 254 ftpmm measured over a minimum length of track of 25,4 mm, exclusive of missing pulses.4.2 azimuth: The angular deviation, in degrees of arc, of the mean flux transition line of the recording made on a trackfrom the line normal to the Reference Edge.4.3

39、back surface: The surface of the tape opposite the magnetic coating which is used to record data.4.4 Beginning-Of-Tape marker (BOT): A hole punched on the centreline of the tape towards the end nearest to theleader.4.5 block: A set of contiguous bytes recorded on a physical track and considered as a

40、 unit.4.6 byte: An ordered set of bits acted upon as a unit.Note - In this International 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 outerend.4.8 Cyclic Redundancy Check (CRC) character: A 64-bi

41、t character, generated by a mathematical computation,used for error detection.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 En

42、d-Of-Tape marker (EOT): A hole punched on the centreline of the tape towards the end farthest from theleader.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 yiel

43、ding check bytes used for the correction oferrors detected by the CRC 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 f

44、lux transition spacing: The distance on the magnetic tape between successive flux transitions.4.18 logical track: A group of four physical tracks that are written or read simultaneously.4.19 magnetic tape: A tape that accepts and retains magnetic signals intended for input, output, and storage purpo

45、ses oncomputers and associated equipment.4.20 Master Standard Reference Tape: A tape selected as the standard for Reference Field, signal amplitude,resolution, peak shift, and overwrite characteristics.Note - The Master Standard Reference Tape has been established by the Quantum Corporation.4.21 obj

46、ect: A Record or a page of type Tape Mark.4.22 page: A logical division of a block.4.23 physical recording density: The number of recorded flux transitions per unit length of track, expressed in fluxtransitions per millimetre (ftpmm).4.24 physical track: A longitudinal area on the tape along which a

47、 series of magnetic signals can be recorded.4.25 Record: A collection of User Bytes, the number of which is determined by the host.4.26 Reference Edge: The bottom edge of the tape when viewing the magnetic coating of the tape with the BOT to theleft and the EOT to the right of the observer.4.27 Refe

48、rence Field: The Typical Field of the Master Standard Reference Tape.4.28 Secondary Standard Reference Tape: A tape the characteristics of which are known and stated in relation tothose of the Master Standard Reference Tape.Note - Secondary Standard Reference Tapes can be ordered under Reference “SS

49、RT/DLT4“from Quantum Corporation, 333 South Street, Shrewsbury, Mass.01545-4195, USA. It is intended that these be used for calibrating tertiary reference tapes for routine calibration.In principle, these Secondary Standard Reference Tapes will be available for a period of 10 years from the publication of the first version of this Internati