ANSI INCITS 213-1994 Information Technology - 90-mm (3.54-in) Optical Disk Cartridge Rewritable and Read Only Using Discrete Block Format (DBF) Method for Digital Information Inter.pdf

1、I ANSI INCITS 213-1 994 (RI 999) (formerly ANSI X3.213-I 994 (RI 999) for Information Technology - 90-mm (3.54-in) Optical Disk Cartridge Rewritable and Read Only Using Discrete Block Format (DBF) Method for Digital Information Interchange Developed by Where IT all begins ANSI X3.213-1994 Amer can N

2、at ion al Standard for Information Technology - 90-mm (3.544) Optical Disk Cartridge Rewritable and Read Only Using Discrete Block Format (DBF) Method for Digital Information Interchange Secretariat Inform at i on Tech no I o g y I n d us t r y Co u n ci I Approved October 6, 1994 American National

3、Standards Institute, Inc. Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review

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9、standard have requested that holders of patents that may be required for the implementation of the standard disclose such patents to the publisher. However, neither the developers nor the publisher have undertaken a patent search in order to identify which, if any, patents may apply to this standard

10、. As of the date of publication of this standard, following calls for the identification of patents that may be required for the implementation of the standard, notice of one or more such claims has been received. By publication of this standard, no position is taken with respect to the validity of

11、this claim or of any rights in connection therewith. The known patent holder(s) has (have), however, filed a statement of willingness to grant a license under these rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain such a license. Details may be obtaine

12、d from the publisher. No further patent search is conducted by the developer or publisher in respect to any standard it processes. No representation is made or implied that this is the only license that may be required to avoid infringement in the use of this standard. Published by American National

13、 Standards Institute 11 West 42nd Street, New York, New York 10036 Copyright O1 995 by Information Technology Industry Council (ITI) All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of ITI

14、, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of America Contents Page Foreword i i i . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Introduction . 1 Normative references . 2 Definitions and acronyms . 3 Environment and safety . 5 Dimensional and physical characteristics of the cas

15、e 6 Mechanical. physical. and dimensional characteristics of the disk . 28 Interface between the cartridge and the drive . 32 Disk optical read/write/erase characteristics . 34 General requirements . 39 Track geometry 41 Track format 45 Characteristics of embossed marks 46 Control track zone 49 Layo

16、ut of the user zone 55 Defect management . 58 Tables 1 Write-inhibit hole 14 2 3 4 5 6 7 8 Figures Dimensions and tolerances of the case . 25 Dimensions and tolerances of the disk and hub 31 Summary of general specifications . 39 Four out of eleven codes reserved for special use 42 Access code marks

17、 46 Four out of eleven codes 43 Summary of the format of the control track zone . 49 Side A (bottom) and side B (top) of the case 7 Overall dimensions viewed on side A . 9 Reference surfaces on side A . 12 Detents. seen on side A . 13 Write-inhibit area and reflectance detection area 15 Spindle and

18、head windows on side A (bottom) and B (top) of the case without shutter . 17 Shutter in just open position and maximum open position . 19 Path for shutter opener 20 i 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Page Mis-insert protections . 21 Gripper slots 23 Hub dimensions and clamping zo

19、ne 29 Label area . 24 Capture cylinder and disk position in operating condition 33 Measuring setup for write. read. and erase characteristics 35 Summary of formatted zone layout . 40 Schematic servo pattern . 45 Amplitude of embossed marks 47 Full width half maximum amplitude of embossed marks 47 Am

20、plitude difference of wobbled marks . 47 Tracking error amplitude 48 Allowable jitter . 48 Sector format . 52 Header format 53 Layout of the user zone 55 Partial ROM bands . 57 Data field configuration ECC with 4-way interleave . 63 Annexes A B C D E F G H I J K L M Definition of class one hundred t

21、housand . 66 Cartridge distortion gauge 67 Compliance of the case 68 Test method for magnetic clamping characteristic of the hub 70 Figure of merit (FOM) . 72 Definition of the write pulse width . 73 Baseline reflectance of full ROM disk . 74 Recorded mark jitter measurement . 75 Transportation envi

22、ronment 77 The humidity chart of environmental conditions . 78 Reference servo . 79 Office environment . 82 Bibliography . 82 ii Foreword (This foreword is not part of American National Standard X3.213-1994.) This standard presents the media and recording requirements for 90-mm (3.54-in) optical dis

23、k cartridge rewritable and read only using discrete block format (DBF) method to be used for information interchange among processing systems, communication systems, and associated equipment utilizing a standard code for interchange. This standard deals with the dimensional and mechanical characteri

24、stics of the case, mechanical, phys- ical, and dimensional characteristics of the disk, and interface between the cartridge and the drive. TC X3B11 on optical disk cartridges, which developed this standard, con- sists of experienced and qualified specialists in recording digital informa- tion on opt

25、ical disk. In the development of this standard, careful considera- tion was given to current practices, existing equipment and supplies, and the broadest possible acceptance, and to providing a basis for future improvements in the use of this cartridge medium. This standard contains 13 annexes. Anne

26、xes A - H are normative and are considered part of this standard. Annexes I - M are for information only. Requests for interpretation, suggestions for improvements or addenda, or defect reports are welcome. They should be sent to the X3 Secretariat, Information Technology Industry Council, 1250 Eye

27、Street, NW, Suite 200, Washington, DC 20005. This standard was processed and approved for submittal to ANSI by the Accredited Standards Committee on Information Technology, X3. Committee approval of the standard does not necessarily imply that all committee members voted for its approval. At the tim

28、e it approved this standard, the X3 committee had the following members: James D. Converse, Chair Donald C. Loughry, Vice-Chair Joanne Flanagan, Secretary Organization Represented Name of Representative American Nuclear Society Geraldine C. Main AMP, Inc. Edward Kelly Sally Hartzell (Alt.) Charles B

29、rill (Alt.) Thomas F. Frost (Alt.) Andrea Vanosdoll (Alt.) Apple Computer, Inc. . Karen Higginbottom AT - Unless otherwise stated, numbers are expressed in binary notation. Where hexadecimal notation is used, the hexadecimal digits are shown between parentheses; - Bit combinations are shown with the

30、 most significant bit to the left; - Negative values are expressed in TWOS complement notation; - The setting of bits is denoted by ZERO and ONE; - The name of entities, e.g., specific tracks, fields, etc., is shown with a capital initial. 2 Normative references The following standards contain provi

31、sions that, through reference in this text, constitute provi- sions of this American National Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investiga

32、te the possibility of applying the most recent edi- tions of the standards indicated below. ANSI X3.172-1990, Information systems - Dictionary for information systems ANSI Y14.5M-l982(R1988), Engineering drawings and related documentation practices- Dimensioning and tolerancing ANSVIEEE 268-1 992, M

33、etric practice ANSI/UL 94-1 990, Tests for flammability of plastic materials for parts in devices and appliances IEC 950, Safety of information technology equipment including electrical business equipment) IS0 1302-1 992, Technical drawings - Method of indicating surface texture) Federal Standard No

34、. 209D, October 27, 1987, Cleanroom and work station requirement, con- trolled environment*) Available from the American National Standards Institute, 11 West 42nd Street, New York, NY 10036. *) Available from U.S. Government Printing Office, Attn: Superintendent of Documents, Washington, DC 20402.

35、2 ANSI X3.213-1994 3 Definitions and acronyms 3.1 Definitions The following definitions, listed in alphabetical order, and those given in ANSI X3.172, Dictionary for Information Systems, apply to this standard: 3.1.1 baseline reflectance: The reflectance of an unwritten, nongrooved and nonformatted

36、area of disk through the substrate. 3.1.2 case: The housing for an optical disk, that protects the disk and facilitates disk inter- change. 3.1.3 clamping zone: The annular part of the disk within which the clamping force is applied by the clamping device. 3.1.4 control track: A track containing the

37、 information on media parameters and format neces- sary for writing, reading, and erasing the remaining tracks on the optical disk. 3.1.5 cyclic redundancy check (CRC): A method for detecting errors in data. 3.1.6 defect management: A method for handling the defective areas on the disk. 3.1.7 disk r

38、eference plane: A plane defined by the perfectly flat annular surface of an ideal spindle onto which the clamping zone of the disk is clamped, and which is normal to the axis of rotation. 3.1.8 entrance surface: The surface of the disk on to which the optical beam first impinges. 3.1.9 error correct

39、ion code (ECC): An error-detecting code designed to correct certain kinds of errors in data. 3.1.10 extinction ratio: The ratio of minimum to maximum power in a parallel beam after pass- ing through a linear polarizer, when the polarizer is rotated through at least 180“ around an axis parallel to th

40、e direction of propagation of the beam. 3.1.11 field: A subdivision of a sector. 3.1.12 format: The arrangement or layout of information on the disk. 3.1.13 hub: The central feature on the disk that interacts with the spindle of the disk drive to provide radial centering and the clamping force. 3.1.

41、14 interleaving: The process of allocating the physical sequence of units of data so as to render the data more immune to burst errors. 3.1.15 Kerr rotation: The rotation of the plane of polarization of an optical beam upon reflec- tion from the recording layer, as caused by the magneto-optical effe

42、ct. 3.1.16 mark: A feature of the recording layer that 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 rep- resents the data on the disk. NOTE - Subdivisions of a sector that are named “mark“ are not marks in the

43、 sense of this definition. 3.1.17 numerical aperture: A measure of the light gathering and resolving power of the objec- tive lens defined as NA = n sin a, where R is the refraction index of the substrate and a is the half angle of the axial ray at the image. 3.1.18 optical disk: A disk that will ac

44、cept and retain information in the form of marks in a recording layer, that can be read with an optical beam. 3.1.19 optical disk cartridge: A device consisting of a case containing an optical disk. 3 ANSI X3.213-1994 3.1.20 polarization: The direction of polarization of an optical disk is the direc

45、tion of the elec- tric vector of the beam. NOTE -The plane of the polarization is the plane containing the electric vector and the direction of propaga- tion of the beam. The polarization is right-handed, when to an observer looking in the direction of propogation of the beam the end point of the el

46、ectric vector would appear to describe an ellipse in the clockwise sense. 3.1.21 pre-recorded mark: A mark so formed as to be unalterable by magneto-optical means. 3.1.22 protective layer: A layer provided to protect the recording layer from mechanical and chemical damage. 3.1.23 read power: The rea

47、d power is the optical power, incident at the entrance surface of the disk, used when reading. NOTE - It is specified as a maximum power that may be used without damage to the written data. Lower power may be used providing that the signal-to-noise ratio and other requirements of this standard are m

48、et. 3.1.24 recording layer: A layer of the disk on, or in, which data is written during manufacture and/or use. 3.1.25 Reed-Solomon code: An error detection and/or correction code that is particularly suit- ed to the correction of errors that occur in bursts or are strongly correlated. 3.1.26 rewrit

49、able optical disk: An optical disk in which data in specified areas can be rewritten by an optical beam. 3.1.27 sector: The smallest addressable part of a track in the information zone of a disk that can be accessed independently of other addressable parts of the zone. 3.1.28 spindle: The part of the disk drive that contacts the disk and/or hub. 3.1.29 substrate: A transparent layer of the disk, provided for mechanical support of the recording layer, through which the optical beam accesses the recording layer. 3.1.30 track: The path that is to be followed by the optical beam during one