ANSI INCITS ISO IEC 14169-1995 Information technology - 90 mm flexible disk cartridges for information interchange - 21 MBytes formatted capacity - IS0 Type 305 (Adopted by INCITS).pdf

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1、INTERNATIONAL STANDARD ISO/IEC 14169 First edition 1995-09-I 5 Information technology - 90 mm flexible disk cartridges for information interchange - 21 MBytes formatted capacity - IS0 Type 305 Technologies de /information - Car-touches B disquette de 90 mm pour Ikhange dinformation - Capacitk format

2、ke de 21 MB - Type IS0 305 Reference number ISO/IEC 14169:1995(E) Adopted by INCITS (InterNational Committee for Information Technology Standards) as an American National Standard.Date of ANSI Approval: 2/5/98Published by American National Standards Institute,25 West 43rd Street, New York, New York

3、10036Copyright 2002 by Information Technology Industry Council (ITI).All rights reserved.These materials are subject to copyright claims of International Standardization Organization (ISO), InternationalElectrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information

4、Technology Industry Council(ITI). Not for resale. No part of this publication may be reproduced in any form, including an electronic retrieval system, withoutthe prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1250 Eye Street NW,Washington, DC 20

5、005.Printed in the United States of AmericaISO/IEC 14169:1995(E) Contents Foreword Introduction Section 1 - General 1 Scope 2 Conformance 2.1 Flexible disk cartridge 2.2 Generating systems 2.3 Receiving systems 3 Normative references 4 Definitions 4.1 Average Signal Amplitude 4.2 case 4.3 Data Secto

6、r 4.4 Data Track 4.5 direction of rotation 4.6 disk 4.7 Error Correcting Code (ECC) 4.8 Error Detecting Code (EDC) 4.9 flux transition frequency 4.10 hub 4.11 index 4.12 Inner Zone 4.13 input bit 4.14 Line of Access of the head 4.15 liner page 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 0 ISO/EC 1995 All righ

7、ts reserved. Unless otherwise specifcd, no part of this publication may be. repreduccd or utilized in any form or by arty means, electronic or mechanical, including photocopying and microfilm, without permissiw in writing from the publisher. ISG/IFX Copyright Office . Case postale 56 . CH-1211 Gencv

8、e 20 . Switzerland Printed in Switzerland ii o ISO/IEC ISO/IEC 14169:1995(E) 4.16 4.17 4.18 4.19 4.20 4.21 4.22 4.23 4.24 4.25 4.26 4.27 4.28 4.29 4.30 4.31 4.32 4.33 Master Standard Reference Flexible Disk Cartridge Outer Zone peak value Primary Identification hole Reference Field Secondary Identif

9、ication hole Secondary Standard Reference Flexible Disk Cartridge Sector Block sector servo Servo Sector Servo Track shutter Side Standard Reference Amplitude Standard Reference Current Test Recording Current Typical Field write-inhibit hole 5 5.1 5.2 6 Conventions and Notations Representation of nu

10、mbers Names Acronyms 7 General description 7.1 Drawings 7.2 Main elements 7.3 Description 7.4 Marking of the FDC Section 2 - Environments, mechanical and physical characteristics 8 8.1 General requirements Environment, transportation and safety 8.1.1 Testing environment 8.1.2 Operating environment 8

11、.1.3 Storage environment 8.1.4 Transportation 8.1.5 Safety 8.2 Materials 8.2.1 Case 8.2.2 Liner 8.2.3 Disk 8.2.4 Hub 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 5 . . . 111 ISOlIEC 14169:1995(E) o ISO/IEC 9 Dimensional characteristics 9.1 Case 9.1.1 9.1.2 9.1.3 9.1.4 9.1.5 9.1.6 9.1.7 9.1.8

12、9.1.9 9.1.10 9.2 9.3 Shape Thickness Hub access hole Locating hole Label area Head windows Write-inhibit hole Identification holes Profile of the shutter edge of the case Shutter Liner Disk 9.3.1 9.3.2 9.4 9.4.1 9.4.2 9.5 9.6 9.7 Diameter Thickness Hub Dimensions Hub orientation holes Optional handl

13、ing notches Interface between cartridge and drive Compliance 10 Physical characteristics 10.1 10.2 10.3 10.4 Flammability Coefficient of linear thermal expansion of the disk Coefficient of linear hygroscopic expansion of the disk Torque 10.4.1 Starting torque 10.4.2 Running torque Section 3 - Requir

14、ements for the unrecorded disk 11 Magnetic recording characteristics 11.1 Recording area 11.2 Track geometry 11.2.1 Number of tracks 11.2.2 Track number 11.2.3 Width of Data Tracks 11.2.4 Data Track location 11.3 Functional testing 11.3.1 Test conditions 11.3.2 Typical Field iv 6 6 6 6 6 6 7 7 8 8 8

15、 9 9 9 9 9 9 9 10 10 11 11 11 11 11 11 11 11 11 12 12 12 12 12 12 12 12 13 13 13 0 ISO/IEC ISO/IEC 14169:1995(E) 11.3.3 Average Signal Amplitude 11.3.4 Resolution 11.3.5 Peak shit 11.3.6 Overwrite 11.3.7 Modulation 11.4 Track quality tests 11.4.1 Missing pulse 11.4.2 Extra pulse 11.4.3 Requirement f

16、or tracks 11.4.4 Rejected cartridge Section 4 - Requirements for the interchanged disk 12 Recording of Data Tracks 15 12.1 12.2 12.3 12.4 15 15 16 16 12.4.1 12.4.2 12.4.3 Method of recording Tolerances of the track locations Recording offset angle Density of recording Nominal density of recording Lo

17、ng-term average Channel bit cell length Short-term average Channel bit cell length 16 16 16 12.5 12.6 12.7 12.8 12.9 12.10 12.11 12.12 Plux transition spacing Average Signal Amplitude Byte Data Sector Cylinder Cylinder number Data capacity of a track Hexadecimal notation 16 17 17 17 17 17 17 18 13 1

18、3.1 Disk layout 18 13.1.1 13.1.2 13.1.3 13.1.4 13.1.5 13.1.6 Layout of a Data Sector Compensation field Sector Identifier Identifier Gap Data Block 20 Data Block Gap 20 20 21 21 22 22 13.2 13.2.1 13.2.2 13.2.3 13.3 Defective Data Sector Data Tracks 22 Data Tracks for the user 23 Data Tracks for the

19、management of defective Data Sectors 23 Data Tracks for servo recovery 23 Coded representation of data 23 14 14 14 14 14 14 14 15 15 15 15 V ISO/IEC 14169:1995(E) 0 ISO/IEC 14 14.1 14.2 14.2.1 14.2.2 14.2.3 14.3 14.4 General requirements for recording Servo Tracks Method of recording Servo Tracks 23

20、 23 23 Number of Servo Tracks Width of Servo Tracks Servo Track location Average Signal Amplitude of servo data Displacement due to fluctuations of signal amplitude of servo data 23 23 24 24 24 15 Layout of the Servo Track 15.1 Layout of the Servo Sector 15.1.1 Servo Identifier 15.1.2 Servo data 24

21、25 26 26 16 Relative position of Data Tracks and Servo Tracks 27 Annexes A - Cartridge distortion test gauge B - Measurement of light transmittance C - Test for compliance D - Method for measuring the effective track width E - Head and read amplifier for functional testing F - Method of measuring pe

22、ak shift G - Method for measuring overwrite H - Procedure and equipment for measuring flux transition spacing J - Handling of defective Data Sectors K - Method for measuring the eccentricity of Servo Tracks L - Method of measuring the offset between Data Tracks and Servo Tracks M - Torque measuremen

23、ts N - Data separators for decoding 2-7 RLL recording P - EDC Implementation Q - ECC Implementation R - Servo Track recording conditions S - Method for measuring the displacement of the head due to amplitude fluctuations of servo data 33 34 37 40 42 43 46 47 49 50 51 52 53 54 56 57 58 T - Institute

24、supplying Secondary Standard Reference Flexible Disk Cartridges 60 0 ISO/IEC ISO/IEC 14169:1995(E) Foreword IS0 (the International Organization for Standardization) and lEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that

25、 are members of IS0 or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. IS0 and IEC technical committees collaborate in fields of mutual interest. Other internat

26、ional organizations, governmental and non- governmental, in liaison with IS0 and IEC, also take part in the work. In the field of information technology, IS0 and IEC have established a joint technical committee, ISO/IEC JTCl. Draft International Standards adopted by the joint technical committee are

27、 circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. International Standard ISO/IEC 14 169 was prepared by the Japanese Industrial Standards Committee (as Standard JIS X 6228 - 1994) with documen

28、t support and contribution from ECMA and was adopted, under a special “fast-track procedure” by Joint Technical Committee ISO/IEC JTCl, Information technology, in parallel with its approval by national bodies of IS0 and IEC. Annexes A to L form an integral part of this International Standard. Annexe

29、s M to T are for information only. vii ISOlIEC 14169: 1995(E) 0 ISO/IEC Introduction This International Standard specifies the characteristics of 90 nun flexible disk cartridges of 21 MBytes formatted capacity, recorded at 3 183 1 ftprad in the Inner Zone and 47 747 ftprad in the Outer Zone with sec

30、tor servo tracking on 326 Data Tracks on each side, using 2-7 RLL recording. This International Standard specifies the physical interchangeability of the unrecorded disk and the format interchangeability of recorded Data Tracks and Servo Tracks. In reference to ISO/IEC 9983, flexible disk cartridges

31、 conforming to this International Standard are designated as IS0 Type 305. . . . Vlll INTERNATIONAL STANDARD o ISO/IEC ISO/IEC 14169: 1995 (E) Information technology - 90 mm flexible disk cartridges for information interchange - 21 MBytes formatted capacity - IS0 Type 305 Section 1 - General 1 Scope

32、 This International Standard specifies the characteristics of 90 mm flexible disk cartridges (FDC) of 21 Mbytes formatted capacity, recorded at 31 83 1 ftprad in the Inner Zone and 47 747 ftprad in the Outer Zone with sector servo tracking on 326 data tracks on each side, using 2-7 RLL recording. It

33、 specifies the mechanical, physical and magnetic characteristics of the cartridge, so as to provide physical interchangeability between data processing systems. It also specifies the method of recording, the quality of recorded signals, the track layouts and the track formats of Data Tracks and Serv

34、o Tracks. Such flexible disk cartridges are identified as IS0 Type 305. Together with a standard for volume and file structure, for instance ISO/IEC 9293, this International Standard provides for full data interchange between data processing systems. 2 Conformance 2.1 Flexible disk cartridge A 90 mm

35、 flexible disk cartridge shall be in conformance with this International Standard if it meets all the mandatory requirements specified herein. 2.2 Generating systems A system generating an FDC for interchange shall be entitled to claim conformance with this International Standard if all recordings o

36、n the flexible disk meet the mandatory requirements of this International Standard. 2.3 Receiving systems A system receiving an FDC for interchange shall be entitled to claim full conformance with this International Standard if it is able to handle any recording made on the flexible disk according t

37、o this International Standard. 3 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and part

38、ies to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 683-13: 1986, Heat-treatable steels, a

39、lloy steels andfree-cutting steels - Part 13: Wrought stainless steels. ISO/IEC 9293: 1994, Information technology - Volume and file structure of disk cartridges for information interchange. ISO/IEC 99831995, Information technology - Designation of unrecordedflexible disk cartridges. IEC 950:1991, S

40、afety of information technology equipment, including electrical business equipment. 4 Definitions For the purposes of this International Standard, the following definitions apply. 4.1 Average Signal Amplitude: The Average Signal Amplitude for a track is the arithmetically averaged value of the outpu

41、t voltages measured peak-to-peak over the whole track. 4.2 case: A protective enclosure including a shutter mechanism, identification holes and a write-inhibit hole. 1 ISO/IEC 14169:1995(E) 0 ISO/IEC 4.3 Data Sector: A sector comprising a Sector Identifier and a Data Block. 4.4 Data Track: A track o

42、n which data are recorded on Data Sectors. 4.5 direction of rotation: The direction of rotation shall be counter-clockwise when looking at Side 0. 4.6 disk: A flexible disk which accepts and retains, on the specified side or sides, magnetic signals intended for input/output and storage purposes. 4.7

43、 Error Correcting Code (ECC): A mathematical procedure yielding bits used for the detection and correction of errors. 4.8 Error Detecting Code (EDC): A mathematical procedure yielding bits used for the detection of errors. 4.9 flux transition frequency: The number of flux transition per second (ftps

44、). NOTE 1 - In this International Standard, the frequencies to be used in the Outer Zone are indicated by the subscript OZ, those to be used in the Inner Zone ate indicated by the subscript IZ (see 11.3.1.1). 4.10 4.11 index: The signal generated in the index transducer of the drive by the drive spi

45、ndle once per revolution. 4.12 Inner Zone: The inner subdivision of the recording area of a surface of the disk. 4.13 4.14 input bit: Bits which represent input data. Line of Access of the head: The straight line described by the centre of the gap of the read/write head when positioned from Track -0

46、04 to Track 328. 4.15 liner: Suitable material between the case and the disk to provide cleaning action and protection from abrasion. 4.16 Master Standard Reference Flexible Disk Cartridge: A flexible disk cartridge selected as the standard for Reference Fields, signal amplitudes, resolution, peak s

47、hift, and overwrite. Tracks 000 and 325 are declared as Reference Tracks. 4.17 Outer Zone: The outer subdivision of the recording area of a surface of the disk. 4.18 peak value: The zero to crest value of the output voltage of the read head. 4.19 Primary Identification hole: A through-hole provided

48、on the case to identify the FDC specified by this International Standard. 4.20 4.21 4.22 hub: A centring and referencing device attached to the disk which allows torque to be transmitted to the disk. The hub is attached to the centre of the disk. It ensures centring of the disk on the drive shaft in

49、 a unique angular position. The reference tracks are calibrated at 600 pm. NOTE 2 - This Master Standard has been established at the Reliability Centre for Electronic Components of Japan (RCJ), 1-1-12 Hachiman-cho, Higashikurume-shi, Tokyo 203. Japan. Reference Field: The Typical Field of the Master Standard Reference Flexible Disk Cartridge. There are two Reference Fields, one for each side. Secondary Identification hole: An identification hole provided on Side 0 of the case to identify the FDCs specified by this International Standard. Secondary Standard Reference Flexible Disk Cartridg