ANSI INCITS 212-1992 Information Systems - 130-mm Rewritable Optical Disk Cartridge for Information Interchange.pdf

1、ANSI INCITS 212-1992 (R2002)(formerly ANSI X3.212-1992 (R1997)for Information Systems 130-mm RewritableOptical Disk Cartridge forInformation InterchangeANSIX3.212-1992American National Standardfor Information Systems 130-mm Rewritable OpticalDisk Cartridge forInformation InterchangeSecretariatComput

2、er and Business Equipment Manufacturers AssociationApproved November 17, 1992American National Standards Institute, Inc.AmericanNationalStandardApproval of an American National Standard requires review by ANSI that therequirements for due process, consensus, and other criteria for approval havebeen

3、met by the standards developer.Consensus is established when, in the judgment of the ANSI Board of StandardsReview, substantial agreement has been reached by directly and materiallyaffected interests. Substantial agreement means much more than a simplemajority, but not necessarily unanimity. Consens

4、us requires that all views andobjections be considered, and that a concerted effort be made toward theirresolution.The use of American National Standards is completely voluntary; their existencedoes not in any respect preclude anyone, whether he has approved the standardsor not, from manufacturing,

5、marketing, purchasing, or using products, processes,or procedures not conforming to the standards.The American National Standards Institute does not develop standards and will inno circumstances give an interpretation of any American National Standard.Moreover, no person shall have the right or auth

6、ority to issue an interpretation ofan American National Standard in the name of the American National StandardsInstitute. Requests for interpretations should be addressed to the secretariat orsponsor whose name appears on the title page of this standard.CAUTION NOTICE: This American National Standar

7、d may be revised orwithdrawn at any time. The procedures of the American National StandardsInstitute require that action be taken periodically to reaffirm, revise, or withdrawthis standard. Purchasers of American National Standards may receive currentinformation on all standards by calling or writin

8、g the American National StandardsInstitute.Published byAmerican National Standards Institute11 West 42nd Street, New York, New York 10036Copyright 1992 by Information Technology Industry Council (ITI)All rights reserved.No part of this publication may be reproduced in anyform, in an electronic retri

9、eval system or otherwise,without prior written permission of ITI, 1250 Eye Street NW,Washington, DC 20005.Printed in the United States of AmericaContentsPageiForeword.iii1 Scope .12 Normative references.13 Conformance.14 Conventions and notations.25 List of acronyms 26 General description .37 Defini

10、tions.38 Environment49 Safety requirements 510 Dimensional and mechanical characteristics of the case611 Dimensional and physical characteristics of the disk1312 Drop test .1413 Interface between disk and drive 1414 Characteristics of the substrate 3115 Characteristics of the recording layer3116 For

11、mat features .3617 Format 49Tables1 Summary of the format of the Data field of the PEP Zone .422 Summary of media information .483 Summary of the requirements for the characteristics of prerecorded (non-alterable) information534 Conversion of input bits to channel bits .595 DMA sectors616 Byte assig

12、nment of the Disk Definition Structure (DDS) .627 Primary Defect List (PDL).638 Secondary Defect List (SDL) 64Figures1 Hub dimensions.172 Case .183 Overall dimensions and reference axes 194 Surfaces S1, S2, S3 and S4 of the reference plane P.204a Detail of surface “S3“ .215 Insertion slot and detent

13、.22ii6 Gripper slots237 Write-inhibit holes248 Media ID sensor holes259 Shutter sensor notch viewed from Side A 2610 Head and motor access2711 Shutter opening feature2812 Capture cylinder 2913 User label area 3014 Definition of ILand IH3415 Amplitude versus frequency .3516 Example of phase-encoded m

14、odulation in the PEP Zone .3817 Position of the laser beam crossing tracks and resulting PEP signals.3818 Track format in the PEP Zone.3919 Sector format in the PEP Zone3920 Example of a sector with Offset Detection Flag for on-land recording (schematic) 5021 Definitions of various parameters for re

15、ad characteristics 5222 Sector format for 1024 user bytes .5423 Sector format for 512 user bytes.5524 Sector Mark pattern .5625 Sector assignment of the definition zones for 1024-byte format6126 Sector assignment of the definition zones for 512-byte format6227 Location of the defined zones .65Annexe

16、sA Optical system for measuring write, read and erase characteristics66B Definition of write and erase pulse width .68C Measurement of figure of merit .69D Values to be implemented in future standards .70E Pointer fields .72F CRC for ID fields73G Interleave, CRC, ECC, Resync for Data field.74H Secto

17、r retirement guidelines.80I Office environment.81J Transportation 82K Requirements for interchange 83PageiiiiiiForeword (This foreword is not part of American National Standard X3.212-1992.)ANSI X3.212-1992 is the result of work begun in early 1989 on a project byAccredited Standards Committee X3B11

18、 to develop a standard for the5.25-in (130-mm) Rewritable Magneto-Optic media. A similar project wasalso started later that same year at the international level in committeeISO/IEC/JTC1-SC23/WG2, which resulted in ISO/IEC 10089:1991. Therewas one significant difference between these two projects. At

19、 the interna-tional level, it was decided to follow the example set by ISO 9171 for 130-mm WORM media by establishing two different and noncompatible record-ing formats under a single standard.The concept of a dual format standard for optical media has never foundfavor among the members of ASC X3B11

20、. It was felt that a standard thatallowed two independent and incompatible recording methods would causeconfusion in the marketplace and make it difficult for users to achieveinterchange of media between various systems.The consensus among the members was that different recording methodsfor 130-mm M

21、O media should be described in separate standards. Theproject to develop ANSI X3.212 was explicitly restricted to a single record-ing method. The consensus among the members of ASC X3B11 was thatonly the Continuous Composite Servo (CCS) using the Run Length Limited(RLL) 2,7 encoding method should be

22、 supported for a draft proposedAmerican National Standard (dpANS) for 130-mm MO media.ISO 10089 permits both Continuous Composite Servo recording with theRLL 2,7 encoding method (Format A) and Sampled Servo recording withthe 4/15 encoding method (Format B). Other than these two recordingmethods, all

23、 other aspects of the cartridge and media are identicalbetween the two formats of ISO/IEC 10089.Because the work proceeded in parallel at the international level and atASC X3B11, it was not initially apparent that both standards would beidentical in all respects other than the option of dual recordi

24、ng methods. In1991, ISO/IEC 10089 was published. The text of the draft (DIS) interna-tional standard, ISO/IEC DIS 10089, was used for a dpANS after all refer-ences to the second format (Sampled Servo and 4/15 encoding) had beenremoved. Thus, ANSI X3.212 is essentially similar to ISO/IEC 10089 withth

25、e exception of the dual format.There are 11 annexes; annexes A, B, C, F, G, and K are normative whileannexes D, E, H, I, and J are informative and are not considered part ofthis standard.Requests for interpretation, suggestions for improvement or addenda, ordefect reports are welcome. They should be

26、 sent to the X3 Secretariat,Computer and Business Equipment Manufacturers Association, 1250 EyeStreet, NW, Suite 200, Washington, DC 20005.This standard was processed and approved for submittal to ANSI byAccredited Standards Committee on Information Processing Systems, X3.Committee approval of this

27、standard does not necessarily imply that allcommittee members voted for its approval. At the time it approved thisstandard, the X3 Committee had the following members:iv(Vacant), ChairDonald C. Loughry, Vice-ChairJoanne Flanagan, Administrative SecretaryOrganization Represented Name of Representativ

28、eAllen-Bradley Company .Ronald H. ReimerJoe Lenner (Alt.)American Library Association.Paul PetersAmerican Nuclear SocietyGeraldine C. MainSally Hartzell (Alt.)AMP, Inc. Edward Kelly Edward Mikoski (Alt.)Apple Computer, IncKaren HigginbottomAssociation of the Institute for Certification of Computer P

29、rofessionals (AICCP)Kenneth ZemrowskiEugene M. Dwyer (Alt.)ATb) Unless otherwise stated, numbers are expressed in binary notation. Where hexadecimalnotation is used, the hexadecimal digits are shown between parentheses;c) Bit combinations are shown with the most significant bit to the left;d) Negati

30、ve values are expressed in TWOs complement notation;e) The setting of bits is denoted by ZERO and ONE;f) The name of entities, e.g., specific tracks, fields, etc., is shown with a capital initial.5 List of acronymsALPC Auto Laser Power ControlAM Address MarkCAV Constant Angular VelocityCRC Cyclic Re

31、dundancy CheckDDS Disk Definition StructureDMA Defect Management AreaDMP Defect Management PointersDMT Defect Management TrackECC Error Correction CodeEDAC Error Detection and Correction CodeID IdentifierLBA Logical Block AddressODC Optical Disk CartridgeODF Offset Detection FlagPA PostamblePDL Prim

32、ary Defect ListPEP Phase-Encoded Part of the control tracksRLL (2,7) Run Length Limited (code)R-S Reed-Solomon (code)R-S/LDC Reed-Solomon Long Distance CodeSDL Secondary Defect ListSFP Standard Formatted Part of the control tracksSM Sector MarkVFO Variable Frequency OscillatorANSI X3.212-19922ANSI X

33、3.212-19926 General descriptionThe optical disk cartridge which is the subject of this Standard consists of a case containing an opti-cal disk. An optical beam is used to write data to, or to read data from, or to erase data from, the diskusing the magno-optical Kerr effect.The disk can be recorded

34、either only on one side or on both sides.The disk is intended for use in a drive with optical access from one side only. To gain access tothe second side of a disk recordable on both sides, the cartridge must be reversed before inser-tion into the drive.Typically, a disk recordable on one side consi

35、sts of a transparent layer acting as a substrate witha recording layer on one side and a hub on the other. The recording layer is accessed by an opti-cal beam through the substrate. A disk recordable on both sides consists of two disks recordableon one side assembled together with the recording laye

36、rs on the inside.Other constructions are permitted but must have the same characteristics.7 DefinitionsFor the purposes of this Standard, the following definitions apply:7.1 case: The housing for an optical disk, that protects the disk and facilitates disk interchange.7.2 clamping zone: The annular

37、part of the disk within which the clamping force is applied bythe clamping device.7.3 control track: A track containing the information on media parameters and format neces-sary for writing, reading, and erasing the remaining tracks on the optical disk.7.4 cyclic redundancy check (CRC): A method for

38、 detecting errors in data.7.5 defect management: A method to handle the defective areas on the disk.7.6 disk reference plane: A plane defined by the perfectly flat annular surface of an ideal spin-dle onto which the clamping zone of the disk is clamped, and which is normal to the axis of rota-tion.7

39、.7 entrance surface: The surface of the disk onto which the optical beam first impinges.7.8 error correction code (ECC): An error-detecting code designed to correct certain kinds oferrors in data.7.9 format: The arrangement of layout of the data on the disk.7.10 hub: The central feature on the disk

40、which interacts with the spindle of the disk drive toprovide radial centering and the clamping force.7.11 interleaving: The process of allocating the physical sequence of units of data so as to ren-der the data more immune to burst errors.7.12 Kerr rotation: The rotation of the plane of polarization

41、 of an optical beam upon reflectionfrom the recording layer, as caused by the magneto-optic Kerr effect.7.13 land and groove: A trench-like feature of the disk, applied before the recording of anyinformation, and used to define the track location. The groove is located nearer to the entrancesurface

42、than the land with which it is paired to form a track.7.14 mark: A feature of the recording layer which may take the form of a magnetic domain, a pit,or any other type or form that can be sensed by the optical system. The pattern of marks repre-sents the data on the disk.37.15 optical disk: A disk t

43、hat will accept and retain information in the form of marks in arecording layer, that can be read with an optical beam.7.16 optical disk cartridge: A device consisting of a case containing an optical disk.7.17 polarization: The direction of polarization of an optical beam is the direction of the ele

44、ctricvector of the beam. NOTE The plane of polarization is the plane containing the electric vector and the direction of propagationof the beam. The polarization is right-handed, when to an observer looking in the direction of the propagationof the beam, the end-point of the electric vector would ap

45、pear to descibe an ellipse in the clockwise sense.7.18 pre-recorded information: Non-alterable information which cannot be changed once thedisk is manufactured.7.19 read power: The read power is the optical power, incident at the entrance surface of thedisk, used when reading.NOTE It is specified as

46、 a maximum power that may be used without damage to the written data. Lowerpowers may be used providing that the signal-to-noise ratio and other requirements of this standard are met.7.20 recording layer: A layer of the disk on or in which data is written during manufacurerand/or use.7.21 ReedSolomo

47、n code: An error detection and/or correction code which is particularly suit-ed to the correction of errors which occur in bursts or are strongly correlated.7.22 rewritable optical disk: An optical disk in which the data in specified areas can be rewrit-ten by an optical beam.7.23 spindle: The part

48、of the disk drive which contacts the disk and/or hub.7.24 substrate: A transparent layer of the disk, provided for mechanical support of the record-ing layer, through which the optical beam accesses the recording layer.7.25 track: The path which is followed by the focus of the optical beam during on

49、e revolution.7.26 track pitch: The distance between adjacent track centerlines, measured in a radial direction. 7.27 write-inhibit hole: A hole in the case which, when detected by the drive to be open,inhibits both write and erase operations.8 Environment8.1 Testing environmentUnless otherwise specified, tests and measurements made on the optical disk cartridge to checkthe requirements of this Standard shall be carried out in an environment where the air immediate-ly surrounding the optical disk cartridge is within the following c