ANSI INCITS ISO IEC 7065-1-1985 Information processing - Data interchange on 200 mm (8 in) flexible disk cartridges using modified frequency modulation recording at 13 262 ftprad 1.pdf

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1、 INCITS/ISO 7065-1:19852010 (ISO 7065-1:1985, IDT) Information processing - Data interchange on 200 mm (8 in) flexible disk cartridges using modified frequency modulation recording at 13 262 ftprad, 1,9 tpmm (48 tpi), on both sides - Part 1 : Dimensional, physical and magnetic characteristics Reaffi

2、rmed as INCITS/ISO/IEC 7065-1:1985 R2015INCITS/ISO 7065-1:19852010 PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed

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5、e inform the Central Secretariat at the address given below. Adopted by INCITS (InterNational Committee for Information Technology Standards) as an American National Standard. Date of ANSI Approval: 10/6/10 Published by American National Standards Institute, 25 West 43rd Street, New York, New York 1

6、0036 Copyright 2010 by Information Technology Industry Council (ITI). All rights reserved. These materials are subject to copyright claims of International Standardization Organization (ISO), International Electrotechnical Commission (IEC), American National Standards Institute (ANSI), and Informati

7、on Technology Industry Council (ITI). Not for resale. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1101 K Street NW, Suite 610, Wa

8、shington DC 20005. Printed in the United States of America ii ITIC 2010 All rights reserved Contents 0 Introduction 1 Scope and field of application 2 References. 3 Definitions 4 General description. . 5 General requirements . 6 Dimensional characteristics. 7 Physical characteristics 8 Magnetic char

9、acteristics Page . . . . 1 1 1 1 2 2 3 5 5 11 13 15 Annexes A Measurement of the cartridge thickness. B Measurement of light transmittance C Method for measuring the effective track width D Write-inhibit notch 16 iii INTERNATIONAL STANDARD IS0 7055/l-1985 (E) Information processing - Data interchang

10、e on 200 mm (8 in) flexible disk cartridges using modified frequency modulation recording at 13 262 ftprad, I,9 tpmm (48 tpi), on both sides - Part 1 : Dimensional, physical and magnetic characteristics 0 Introduction IS0 7965 specifies the characteristics of 200 mm (8 in) flexible disk cartridges r

11、ecorded at 13 262 ftprad, I,9 tpmm (48 tpi), on both sides using modified frequency modulation recording. IS0 7065/2 specifies the quality of recorded signals, the track layout, and the track format to be used on a 200 mm (8 in) flexible disk cartridge, recorded at 13 262 ftprad, 1.9 tpmm (48 tpi),

12、on both sides, using modified frequency modulation recording, which is intended for data interchange between data processing systems. Together with the labelling scheme specified in IS0 7665, IS0 7065/l and IS0 7065/2 provide for full data interchange between data processing systems. 1 Scope and fie

13、ld of application This part of IS0 7665 specifies the dimensional, physical and magnetic characteristics of the cartridge, so as to provide physical interchangeability between data processing systems. NOTE - Numeric values in the SI and/or Imperial measurement systems in this International Standard

14、may have been rounded and therefore are consistent with, but not exactly equal to, each other. Either system may be used, but the two should be neither intermixed nor reconverted. The original design was made using the Imperial measurement system. 2 References IS0 646, Information processing - IS0 7

15、-bit coded character set for information interchange. IS0 2022, Information processing - IS0 7-bit and 8-bit coded character sets - Code extension techniques. IS0 4373, Information processing - 8-bit code for information interchange - Structure and rules for implementation. IS0 7665, Information pro

16、cessing - File structure and labelling of flexible disc cartridges for information interchange. 3 Definitions For the purpose of this International Standard the following definitions apply : 3.1 flexible disk: A flexible disk which accepts and retains on the specified side or sides magnetic signals

17、intended for input/output and storage purposes of information data pro- cessing and associated systems. 3.2 reference flexible disk cartridge: A flexible disk car- tridge arbitrarily selected for a given property for calibrating purposes. 3.3 secondary reference flexible disk cartridge: A flex- ible

18、 disk cartridge intended for routine calibrating purposes, the performance of which is known and stated in relation to that of the reference flexible disk cartridge. 3.4 signal amplitude reference flexible disk cartridge: A reference flexible disk cartridge selected as a standard for recording field

19、 and signal amplitude. On side 0 of this cartridge track 00, having a radius of 91,754 mm (3.612 4 in) and track 76, having a radius of 51,537 mm (2,029 0 in) are declared as reference tracks. To provide a standard for side 1 the same surface is used by turn- ing the disk over in the jacket. Under t

20、hese conditions track 00 has now a radius of 89,637 mm (3.529 0 in) and is not a reference track. However, its correlation with the reference track having a radius of 91,754 mm (3.612 4 in) is sufficiently close for the purpose of this International Standard. Track 72 having a radius of 51,537 mm (2

21、.029 0 in) is a reference track and is therefore used instead of track 76. NOTE - A master standard for signal amplitudes, reference fields, overwrite and resolution characteristics has been established by the Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100 in Braunschweig, Germany, F.R

22、. Secondary reference flexible disk car- tridges can be ordered from PTB, Lab 5.11, under pan number RM 5654 as long as available. 1 IS0 7065/l-1985 (El 3.5 typical field : The minimum recording field which, when applied to a flexible disk cartridge, causes a signal output equal to 95 % of the maxim

23、um average signal amplitude when taken as a function of the recording field at the specified track and flux transition frequency of that flexible disk cartridge. 3.6 reference field : The typical field of the signal amplitude reference flexible disk cartridge. 3.7 test recording currents: The four r

24、ecording currents between 145 % and 155 % of the currents which produce the reference field at 250 000 flux transitions per second (ftps) on tracks 00 and 76 of side 0 and on tracks 00 and 72 of side 1. For each side, the first of these currents shall be used for recording on tracks 00 to 43 and the

25、 second shall be used for recording on tracks 44 to 76. 3.8 standard reference amplitudes: The average signal amplitudes derived from the reference tracks of the signal amplitude reference flexible disk cartridge. SRA,f is the average signal amplitude from a recording written using 250 000 ftps at a

26、 radius of 91,754 mm (3.612 4 in). SRAU is the average signal amplitude from a recording written using 500 000 ftps at a radius of 51,537 mm (2.029 0 in). 3.9 average signal amplitude : The arithmetically averaged value for a track of the output voltage measured peak-to-peak over the whole track. 3.

27、10 in contact: An operating condition in which the magnetic surface of the disk intended for data storage is in physical contact with the magnetic head. 3.11 formatting : Writing the proper control information, establishing the 77 physical cylinders and designating ad- dresses of physical records on

28、 the flexible disks surfaces. 3.12 initialization : Writing of the volume label, the ERMAP label, and any other information initially required to be on the flexible disk cartridge, prior to the commencement of general processing or use. 3.13 recording area: That area of each disk surface with which

29、the head may come into contact. 4 General description 4.1 General figures A typical flexible disk cartridge is represented in figures 1 to 3 as follows : Figure 1 - Flexible disk cartridge, shows the cartridge seen from above, side 0 up; Figure 2 - Section A-A, is a cross-section, along line A-A in

30、figure 1; Figure 3 - Protective envelope with cartridge, shows a pro- tective envelope with cartridge, side 1 up. 4.2 Main elements The main elements of this flexible disk cartridge are - the recording disk; - the liner; - the jacket. The cartridge is stored in an envelope. 4.3 Description The jacke

31、t is of a square form. It includes a central window, an index window and a head window in both sides. The liner is fixed to the inside of the jacket. It comprises two layers of material between which the disk is held. The liner has the same openings as the jacket. The disk has two recording sides, a

32、nd has only a central win- dow and an index window. 4.4 Optional features The interchange characteristics of the jacket allow for vari- ations of its construction. It may include flaps, (for example, three flaps as shown in the figures, or none), and notches along the reference edge. For conditions

33、under which a write-inhibit notch may be used, see annex D. 5 General requirements 5.1 Environment and transportation 5.1.1 Testing environment Tests and measurements made on the cartridge to check the re- quirements of this International Standard shall be carried out under the following conditions

34、: temperature: 23 f 2 “C (73 * 4 OF) relative humidity: 40 % to 60 % conditioning before testing : 24 h minimum The temperature and the relative humidity shall be measured in the air immediately surrounding the cartridge. The stray magnetic field at any point on the disk surface, in- cluding that re

35、sulting from the concentrating effect on the recording head, shall not exceed 4 000 A/m (50 Oe). 5.1.2 Operating environment Cartridges used for data interchange shall be operated under the following conditions : temperature: 10 to 51,5 OC (50 to 125 “F) relative humidity: 20 % to 90 % wet bulb temp

36、erature : less than 29 OC (64 OFI 2 IS0 7065/l-1965 (El The temperature and the relative humidity shall be measured in the air immediately surrounding the cartridge. It is recom- mended that the rate of change of the temperature should not exceed 20 OC (36 OFI per hour. 5.2 Materials 5.2.1 Jacket Th

37、e jacket may be constructed from any suitable material. There shall be no deposit of moisture on or in the cartridge. 5.2.2 Liner The stray magnetic field at any point on the disk surface, in- cluding that resulting from the concentrating effect on the recording head, shall not exceed 4 000 A/m (50

38、Oe). The material of the liner shall be able to retain dust without damage to the disk. 5.1.3 Storage environment 5.2.3 Disk During storage the cartridges shall be kept under the following conditions : The disk may be constructed from any suitable material (for example, bi-axially oriented polyethyl

39、ene terephthalate) coated on both sides with a strong and flexible layer of magnetic ma- terial (for example y-Fe20s). temperature: 4 to 51,5 “C (40 to 125 OFI relative humidity: 8 % to 80 % 5.2.4 Envelope Each cartridge shall be in an envelope and in an upright pos- ition. The envelope may be manuf

40、actured from any suitable material (for example, paper). The stray magnetic field shall not exceed 4 000 A/m (50 Oel. 5.3 Direction of rotation NOTE - Cartridges which have been stored in temperatures and humidities outside the operating condition, but within the storage con- ditions may exhibit deg

41、raded performance characteristics. Such car- tridges should be subjected to a conditioning period of not less than 24 h within the operating environment prior to use. The direction of rotation shall be counter-clockwise when look- ing at side 0. 6 Dimensional characteristics 5.1.4 Transportation The

42、 dimensional characteristics listed in the sub-clauses below are indicated in figures 4 to 7. Figure 4 - Jacket dimensions shows the jacket. Figure 5 - Cartridge thickness shows a partial cross-section of the jacket. Figure 6 - Disk dimensions shows the disk. Figure 7 - Disk thickness shows a cross-

43、section of the disk. Responsibility for ensuring that adequate precautions are taken during transportation shall be with the sender. During transpor- tation the cartridge shall be in its envelope, and in a protective package. The latter shall be free from dust or extraneous mat- ter. It shall have a

44、 clean interior and construction preventing in- gress of dust and water. It is recommended that a sufficient space exists between cartridge and outer surface of the final container, so that risk of damage due to stray magnetic fields will be negligible. All dimensions are referred to the reference e

45、dge of the car- tridge (see figure 4). It is recommended that the following conditions should not be exceeded : 6.1 Jacket temperature : - 40 to 51,5 OC ( - 40 to 125 OFI 6.1.1 Form maximum rate of temperature change: 20 OC (36 OFI per hour The jacket shall have a square form with angles of 90 + 30)

46、 and a side length I, = 203,2 k 0,4 mm (8.000 + 0.015 in) relative humidity: 8 % to 90 % No moisture shall condense in or on the cartridge. 6.1.2 Thickness 5.1.5 Handling 6.1.2.1 Jacket wall and liner The cartridge shall stay out of its envelope for the shortest time possible. When handling the cart

47、ridge the operator shall not touch the exposed magnetic surfaces of the disk and shall avoid exposing the cartridge to direct sunlight, moisture and dust. In an area defined by r, = 60 mm (2.36 in) r2 = 85 mm (3.35 in) 3 IS0 7065/l-1985 (E) and with a probe having a diameter of 15 mm (0.59 in) applied against the cartridge with a force of 1 N (3.6 ozf 1, the thickness of the jacket wall and liner shall be e, = 0,45 * 0,15 mm (0.018 f 0.065 in) 6.1.2.2 Cartridge The overall thickness of the cartridge shall be (see 6.1.7) I,2 mm (0.047