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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 track 7.874-in (2OO-mm) outer diameter and 2.500-in (63,5-mm) inner diameter Copyright American National Standards Institute Provided by IHS under licen
2、se with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Y
3、okosuka/9961031100 Not for Resale, 05/08/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI X3.120-1984 American National Standard for Information Systems - Contact Start-Stop Storage Disk - 95 840 Flux Transitions per Track 7.874-in (200-mm) Outer Diameter
4、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 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yok
5、osuka/9961031100 Not for Resale, 05/08/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- American National Standard Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approva
6、l have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily un
7、animity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not,
8、 from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person sha
9、ll have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: T
10、his American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on a
11、ll standards by calling or writing the American National Standards Institute. Published by American National Standards Institute 11 West 42nd Street, New York, New York 10036 Copyright 1984 by Information Technology Industry Council (ITI) All rights reserved. No part of this publication may be repro
12、duced in any form, 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 America Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repa
13、ir Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- Foreword (This Foreword is not part of American National Standard X3.120-1984.) This standard presents the general, physical, and magnetic requirements for ac
14、hieving unrecorded media interchange between compatible rigid disk storage applications, using either fixed or removable media. Subsequent standards may specify other disks with different storage and performance capabilities, or additional requirements for this media, relevant to higher levels of in
15、ter- change in a specific application. Due to the variety of possible applications of the stan- dardized media, whether used singly or in multiple-fixed 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
16、 single disk level. Technical Committee X3B7 on Magnetic Disks, which developed this standard, consists of a group of experienced and qualified specialists on rigid disk media and the associated disk storage drives. In the development of this standard, careful consideration was given to current prac
17、tices, existing equipment, and applicable standards being developed inter- nally. This standard was approved as an American National Standard by the American National Standards Institute on June 12,1984. Suggestions for improvement of this standard will be welcome. They should be sent to the Compute
18、r and Business Equipment Manufacturers Association, 3 11 First Street, NW, Suite 500, Washington, DC 20001. This standard was processed and approved for submittal to ANSI by American National Standards Committee on Information Processing Systems, X3. Committee approval of the standard does not neces
19、sarily imply that all committee members voted for its ap- proval. At the time it approved this standard, the X3 Committee had the following members. Edward Lohse, Chair William C. Rinehuls, Vice-Chair Catherine A. Kachurik, Administrative Secretary Organization Represented Name of Representative Ame
20、rican Library Association. . . . . . . . . . . . . . . . . . . . . . . . . . . . Paul Peters American Nuclear Society . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . Geraldine C. Main D. R. Vondy (Ah) AMP Incorporated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pa
21、trick E. Lannan Edward Kelly (AR) AMTELCO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stephen Soto Association of American Railroads. . . . . . . . . . . . . . . . . . . . . . . . . R. A. Petrash Association for Computing Machinery. . . . . . . . . . . . . . . . . .
22、. . . . . J. A. N. Lee Pat Skelly (AR) Association of the Institute for Certification of Computer Professionals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thomas M. Kurihara Ardyn E. Dubnow (AR) AT&T Company . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Henry L.
23、 Marchese Paul W. Campbell (AR) Stuart M. Garland (Ah) AT&T Information Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Herbert V. Bertine Paul D. Bartoli (Ah) Burroughs Corporation. . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . Ira R. Purchis Ernest L. Dixon (Ah) Co
24、ntrol Data Corporation _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Charles E. Cooper Keith Lucke (Ah) Cooperating Users of Burroughs Equipment. . . . . . . . . . . . . . . . . . . . Thomas Easterday Thomas Grier (Ah) Data General Corporation . . . . . . . . . . . . . . . . . . . . .
25、. . . . . . . . . John Pilat Howell A. Richards (AR) Data Processing Management Association . . . . . . . . . . . . . . . . . . . . . Ardyn E. Dubnow Lou Mills (Ah) Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961
26、031100 Not for Resale, 05/08/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- _ ._.-.-. . .L._-_.L- -“, .a ., _ ._. : - - Organization Represented Digital Equipment Computer Users Society Digital Equipment Corporation. Exxon Office Systems General Electric Comp
27、any General Services Administration GUIDE International. Harris Corporation Hewlett-Packard. . Honeywell Information Systems IBM Corporation . IEEE Lawrence Berkeley Laboratory . Life Office Management Association. . Moore Business Forms, Inc . National Bureau of Standards. . National Communications
28、 System . NCR Corporation. Perkin-Elmer. . Prime Computer. . Recognition Technology Users Association SHARE,Inc Sperry Corporation. . Texas Instruments, Inc. . 3MCompany . Travelers Insurance Companies, Inc. U.S. Department of Defense. VIM . Wang Laboratories, Inc. . Xerox Corporation Name of Repres
29、entative James Hodges Paula Morin (Alt) Lois C. Frampton Gary S. Robinson (AR) Robert Greenblatt Hugh D. Thuerk William C. Rinehuls Donald J. Page (AR) Frank Kirshenbaum Thomas F. OLeary, Jr (AH) Sam Mathan Rajiv Sinha (AR) Donald C. Loughry Thomas J. McNamara David M. Taylor (AR) Mary Anne Gray Rob
30、ert H. Follett (AR) Sava Sherr Robert Poston (AR) Thomas A. Varetoni (AR) David F. Stevens John S. Colonias (AR) James J. Merrick James F. Foley, Jr (AR) Delmer H. Oddy Robert E. Rountree James H. Burrows (Ah) Marshall L. Cam George W. White (Alt) Thomas W. Kern A. R. Daniels (Alt) James Pisarcik Ru
31、ss Lombard0 (AR) Melvin L. Cassio Herbert F. Schantz G. W. Wetzel (AR) Thomas B. Steel Daniel Schuster (AR) Marvin W. Bass Charles D. Card (AR) Presley Smith Richard F. TIOW, Jr (Alt) R. C. Smith Joseph T. Brophy William LaPlant Belkis Leong-Hong (AR) Chris Tanner Joe Fitzgerald (AR) Marsha Hayek Jo
32、hn L. Wheeler Arthur R. Machell (AR) Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- Technical C
33、ommittee X3B7 on Magnetic Disks, which developed this standard, had the following members: William Carlson, Chair Paul D. Jahnke, Vice-Chair Tony Saratora, Secretary David C. Abbe J. L. Amstutz George Andel Gil Argentina Wolfgang Arnold Wendell Bale Dave Barnes James L. Barnes Peter Berkenkotter War
34、ren Bilich Shahbuddin Billawala G. 0. Blanchard Mike Bolt Jerry Bonzo Jim Boothe William L. Bramlett, Jr Don Bruck Otto Butsch David E. Butz Norm Chandler Robert Charlton Jim Colley Frank Conaty Bert Cook Dennis Cook Jack Corey Thomas Craig John Cusimano John Dahl David Danson Ken Davies M. Deese Jo
35、hn Dehnar Ron Dennison Robert Dubin R. Elliott Soji Endo Bill Erdman George Fencl TomFerrara Ian Fleming Rex Fuller Allghiero Galvagni Arpad Garamy Marv Garrison Bob Gaskln Robert Gaskins John Gauke Stan Geyer Paul N. Green Mark Heerema Terry Henning Dennis Hickman Mike Hiss Carl Holder Frank G. Hug
36、gins Bill Johnson Don Johnson Phillip Johnson Emile Kerba Curt Kissinger Norman Klivans Gerald Korth Cris Krishnan Ron Kubec Dick Laat Barbara Langland Charles Lawrence John Lee Ken Liebler Mark Lienau Victor Longa Frank Lum Rich Lutke Frank Lutz Tom Mack Hector MacKay Steve Mancey John Mandle Don M
37、ann John Mansueto Don Mattson Gary Mattson Ed McDonald Patrick McGinnis Tim R. McGuire Marcus Meier Frank Meijers Chuck Meimberg Mark Meyer L. Michelson Chet Mielcarz Dick Milroy John Miyata Jim Money James Moore Joe Moravek Wayne Morris Tim Morrison Bob Mortensen William Mosher Ronald Moskowitz Cha
38、rles Mpagazehe Heifa Mukhtar R. Nabozny Carmen Nargl Al Nicholson Dan Norman Bob Numbers Francis Odell Jan Olsen Robert O Rear A. Ortiz Bob Owen Shyam Parikh Pravin Pate1 Bruce Payette John Perample Anthony L. Perllck Roger Peterson Jerry Phipps Billy G. Rager Vernon Riedlin Bob Rizos Don Rolph Robe
39、rt Rottmayer Frank Ruble Mel Sackter Larry Santucci Anthony Saratora Jack Sartin Minoru Sasaki John Sasser Dan Sayre Jerome Schaufeld Ewald Schelert Gus Schmid Wii D. Schrupp Gary Shawhan Mike Shebanow Wallv Shimez Edgar Shinn- Dean Shoemaker Lief Skarr Rick Slocum Jim Smith Hal Sowle A. Spencer Den
40、nis Stark Robert Stetson John Stocker Steve Stone Roger Stromsta Ed Sutter David Sutton Larry Sutton Chuck Sydoryk Takeo Tabuchi Dan Tanner Thomas Tuchscherer Chenshi J. Tung Erich Valstyn John VanValkenburgh Nal Viswanathan Gwen Wade Joshua Waldman Joel Weiss Ron Weiss David M. White Chelman Wang J
41、ack Yagl - Minor Yamada Richard F. Young C. Zachman Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,
42、-,- Contents SECTION PAGE l.Scope 9 2. General Requirements . 9 2.1 Operation and Storage Environment 9 2.2 Test Conditions. . 9 2.3 Material. 9 2.4 Coefficient of Thermal Expansion .I0 3. Dimensions lO 3.1 General.lO 3.2 Inner Diameter. .lO 3.3 Outer Diameter. .I0 3.4 Concentricity. 10 3.5 Thicknes
43、s. .I0 3.6 Edge Condition. .10 3.7 Clamping Area . .lO 3.8 Location of Flyable Magnetic Surfaces 10 4. Physical Characteristics. 10 4.1 Moment of Inertia. . 10 4.2 Maximum Speed .10 4.3 Runout.lO 4.4 Surface Roughness. .I2 4.5 Durability of Magnetic Surfaces .12 4.6 Lubrication of Magnetic Surfaces
44、. .12 4.7 Head/Disk Friction .12 4.8 Head/Disk Stiction .13 4.9 Cleaning of the Magnetic Surfaces. .13 4.10 Discharge Path . .13 5. Testing of Magnetic Characteristics . 13 5.1 Test Conditions. .13 5.2 Track and Recording Information. .13 5.3 Standard Reference Surface. .13 5.4 Test Head .13 5.5 Con
45、ditions for Test Head Measurements . 15 5.6 Read Channel. . .15 5.7 Automatic Gain Controlled Amplifier . 15 5.8 Track Average Amplitude .15 5.9 Test Signals . .15 5.10 DC Erasure. . .15 6. Surface Tests .15 6.1 Amplitude Test. .15 6.2 Resolution Test. .15 6.3 Overwrite Test . .17 6.4 Residual Noise
46、 Test .17 7. Track Quality Test. .17 7.1 Positive Modulation Test. .17 7.2 Negative Modulation Test .17 7.3 Missing Pulse Test . .17 7.4 Extra Pulse Test . .17 8. Acceptance Criteria for Magnetic Surfaces . .18 8.1 Surface Test Criteria . .18 8.2 Track Quality (Modulation) Criteria . .18 Copyright A
47、merican National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 22:18:58 MDTNo reproduction or networking permitted without license from IHS -,-,- SECTION PAGE 9. Defects of the Magnetic Surfaces . .18 9.1
48、Single Defect .I8 9.2 Defect Criteria . .18 Table 1 Write and DC-Erase Current. .14 Figures Figure 1 Reference Hub. . 11 Figure 2 Disk Dimensions. 11 Figure 3 Edge Conditions. . .I1 Figure 4 Write Current Waveform .14 Figure 5 AGC Amplifier Characteristics .16 Figure 6 AGC Response Characteristics. .I6 Figure 7 Track Average Amplitude, 2F. .16 Figure 8 Modulation Tests . .I7 Appendixes Appendix A Class 100 Air Cleanliness. . . . . . . . . . . . . . _ . . . . Figure Al Relationship of Particle Size to Amount of P