ANSI INCITS 120-1984 Information Systems - Contact Start-Stop Storage Disk - 95 840 Flux Transitions per Track 7.874-in (200-mm) Outer Diameter and 2.500-in (63 5-mm) Inner Diamete.pdf
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1、ANSI INCITS 120-1984 (R2002)(formerly ANSI X3.120-1984 (R2001)for information systems contact start-stop storage disk 95 840 flux transitions per track7.874-in (2OO-mm) outer diameter and2.500-in (63,5-mm) inner diameterANSI X3.120-1984 American National Standard for Information Systems - Contact St
2、art-Stop Storage Disk - 95 840 Flux Transitions per Track 7.874-in (200-mm) Outer Diameter and 2.500-in (63,5-mm) Inner Diameter Secretariat Computer and Business Equipment Manufacturers Association Approved June 12, 1984 American National Standards Institute, I nc AmericanNationalStandardApproval o
3、f an American National Standard requires review by ANSI that therequirements for due process, consensus, and other criteria for approval havebeen met by the standards developer.Consensus is established when, in the judgment of the ANSI Board of StandardsReview, substantial agreement has been reached
4、 by directly and materiallyaffected interests. Substantial agreement means much more than a simplemajority, but not necessarily unanimity. Consensus requires that all views andobjections be considered, and that a concerted effort be made toward theirresolution.The use of American National Standards
5、is completely voluntary; their existencedoes not in any respect preclude anyone, whether he has approved the standardsor not, from manufacturing, marketing, purchasing, or using products, processes,or procedures not conforming to the standards.The American National Standards Institute does not devel
6、op standards and will inno circumstances give an interpretation of any American National Standard.Moreover, no person shall have the right or authority to issue an interpretation ofan American National Standard in the name of the American National StandardsInstitute. Requests for interpretations sho
7、uld be addressed to the secretariat orsponsor whose name appears on the title page of this standard.CAUTION NOTICE: This American National Standard may be revised orwithdrawn at any time. The procedures of the American National StandardsInstitute require that action be taken periodically to reaffirm
8、, revise, or withdrawthis standard. Purchasers of American National Standards may receive currentinformation on all standards by calling or writing the American National StandardsInstitute.Published byAmerican National Standards Institute11 West 42nd Street, New York, New York 10036Copyright 1984 by
9、 Information Technology Industry Council (ITI)All rights reserved.No part of this publication may be reproduced in anyform, in an electronic retrieval system or otherwise,without prior written permission of ITI, 1250 Eye Street NW,Washington, DC 20005.Printed in the United States of AmericaForeword
10、(This Foreword is not part of American National Standard X3.120-1984.) This standard presents the general, physical, and magnetic requirements for achieving unrecorded media interchange between compatible rigid disk storage applications, using either fixed or removable media. Subsequent standards ma
11、y specify other disks with different storage and performance capabilities, or additional requirements for this media, relevant to higher levels of inter- change in a specific application. Due to the variety of possible applications of the stan- dardized media, whether used singly or in multiple-fixe
12、d disk machines, or in removable disk cartridges and packs, there has been no attempt to define data format or data inter- change requirements at the single disk level. Technical Committee X3B7 on Magnetic Disks, which developed this standard, consists of a group of experienced and qualified special
13、ists on rigid disk media and the associated disk storage drives. In the development of this standard, careful consideration was given to current practices, existing equipment, and applicable standards being developed inter- nally. This standard was approved as an American National Standard by the Am
14、erican National Standards Institute on June 12,1984. Suggestions for improvement of this standard will be welcome. They should be sent to the Computer and Business Equipment Manufacturers Association, 3 11 First Street, NW, Suite 500, Washington, DC 20001. This standard was processed and approved fo
15、r submittal to ANSI by American National Standards Committee on Information Processing Systems, X3. Committee approval of the standard does not necessarily imply that all committee members voted for its ap- proval. At the time it approved this standard, the X3 Committee had the following members. Ed
16、ward Lohse, Chair William C. Rinehuls, Vice-Chair Catherine A. Kachurik, Administrative Secretary Organization Represented Name of Representative American Library Association. . . . . . . . . . . . . . . . . . . . . . . . . . . . Paul Peters American Nuclear Society . . . . . . . . . . . . . . . . .
17、 . . . . . . . . . . _ . . Geraldine C. Main D. R. Vondy (Ah) AMP Incorporated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Patrick E. Lannan Edward Kelly (AR) AMTELCO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stephen Soto Association of Amer
18、ican Railroads. . . . . . . . . . . . . . . . . . . . . . . . . R. A. Petrash Association for Computing Machinery. . . . . . . . . . . . . . . . . . . . . . . J. A. N. Lee Pat Skelly (AR) Association of the Institute for Certification of Computer Professionals. . . . . . . . . . . . . . . . . . . .
19、. . . . . . . . . Thomas M. Kurihara Ardyn E. Dubnow (AR) AT&T Company . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Henry L. Marchese Paul W. Campbell (AR) Stuart M. Garland (Ah) AT&T Information Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Herbert V. Ber
20、tine Paul D. Bartoli (Ah) Burroughs Corporation. . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . Ira R. Purchis Ernest L. Dixon (Ah) Control Data Corporation _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Charles E. Cooper Keith Lucke (Ah) Cooperating Users of Burroughs Eq
21、uipment. . . . . . . . . . . . . . . . . . . . Thomas Easterday Thomas Grier (Ah) Data General Corporation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . John Pilat Howell A. Richards (AR) Data Processing Management Association . . . . . . . . . . . . . . . . . . . . . Ardyn E. Dubnow L
22、ou Mills (Ah) _ ._.-.-. . .L._-_.L- -“, .a ., _ ._. : - - Organization Represented Digital Equipment Computer Users Society Digital Equipment Corporation. Exxon Office Systems General Electric Company General Services Administration GUIDE International. Harris Corporation Hewlett-Packard. . Honeywel
23、l Information Systems IBM Corporation . IEEE Lawrence Berkeley Laboratory . Life Office Management Association. . Moore Business Forms, Inc . National Bureau of Standards. . National Communications System . NCR Corporation. Perkin-Elmer. . Prime Computer. . Recognition Technology Users Association S
24、HARE,Inc Sperry Corporation. . Texas Instruments, Inc. . 3MCompany . Travelers Insurance Companies, Inc. U.S. Department of Defense. VIM . Wang Laboratories, Inc. . Xerox Corporation Name of Representative James Hodges Paula Morin (Alt) Lois C. Frampton Gary S. Robinson (AR) Robert Greenblatt Hugh D
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