ANSI INCITS ISO IEC 5653-1980 Information processing - Interchangeable magnetic twelve-disk pack (200 Mbytes).pdf

1、 INCITS/ISO 5653:19802010 (ISO 5653:1980, IDT) Information processing - Interchangeable magnetic twelve-disk pack (200 Mbytes) Reaffirmed as INCITS/ISO/IEC 5653:1980 R2015INCITS/ISO 5653:19802010 PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy,

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4、nsure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. Adopted by INCITS (InterNational Committee for Information Technology Standards) as an American National Stand

5、ard. Date of ANSI Approval: 9/29/2010 Published by American National Standards Institute, 25 West 43rd Street, New York, New York 10036 Copyright 2010 by Information Technology Industry Council (ITI). All rights reserved. These materials are subject to copyright claims of International Standardizati

6、on Organization (ISO), International Electrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information 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 pr

7、ior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1101 K Street NW, Suite 610, Washington DC 20005. Printed in the United States of America ii ITIC 2010 All rights reserved Contents 1 Scope and field of application . 2 References . Section one : Gene

8、ral description . 3 General description Section two : Mechanical and physical characteristics . 4 General requirements . 5 Dimensional characteristics . 6 Physical characteristics Section three : Magnetic characteristics 7 Track and recording information - Data surfaces. . 8 Test conditions and equi

9、pment - Data surfaces . 9 Functional testing - Data surfaces 10 Acceptance criteria for data surface. . 11 Servosurface . Section four : Pre-initialization . 12 Data track pre-initialization . Annexes A Air cleanliness class 100 B Measurement of track width . C ECC implementation (not part of the st

10、andard) . D General track format (not part of the standard) . Page 1 1 1 1 2 2 2 5 7 7 7 10 11 11 17 17 32 33 34 36 INTERNATIONAL STANDARD IS0 5653-1980 (E) Information processing - Interchangeable magnetic twelve-disk pack (200 Mbytes) 1 Scope and field of application This International Standard sp

11、ecifies the general, physical, and magnetic characteristics and the pre-initialization for the physical interchange of 200 Mbytes magnetic twelve-disk packs, for use in electronic data processing systems. NOTE - The original design of the subject of this International Stan- dard was made using the I

12、mperial measurement system. Some later developments, however, have been made using the SI measurement system. In the process of conversion into the alternative system, values may have been rounded. Therefore, they are consistent with but not exactly equal to each other. Either system may be used, bu

13、t the two shall be neither mixed nor reconverted. 2 References ISOIR 80, Rockwell hardness test (B and C scalesl for steel. IS0 646, 7-bit coded character set for information processing interchange. IS0 1302, Technical drawings - Method of indicating surface texture on drawings. IS0 2022, Code exten

14、sion techniques for use with the /SO Fbit coded character set. IS0 5864, IS0 inch screw threads - Allowances and tolerances. Section one - General description 3 General description 3.1 General figures A typical twelve-disk pack is represented in figures 6 to 11 : - figure 6 shows an exploded view; -

15、 figure 7 shows a vertical cross-section; - figure 8 shows, at an enlarged scale, the relationship between the top cover and the bottom protective disk; - figure 9 shows a schematic cross-section of part of the disk pack; - figure 10 shows a schematic cross-section of the spin- dle lock; - figure 11

16、 shows an enlarged view of the edge of a disk. 3.2 Main elements The main elements of this twelve-disk pack are : - the top cover; - the hub; - the spindle lock; - the protective disks; - the recording disks; - the servo surface; - the bottom cover. Other elements shown in the drawings are for bette

17、r under- standing of the figures only and are not part of the standard. 3.3 Direction of rotation The disk pack shall rotate counter-clockwise when viewed from the top. 3.4 Pack capacity A gross information capacity of 200 million 8-bit bytes is achieved in this 12-disk pack by the use of 19 data di

18、sk sur- faces. Data are recorded on 808 tracks per data surface. The track spacing gives approximately 15 tracks per millimetre, each containing a maximum of 13 030 8-bit bytes of informa- tion. The recording density varies between outer and inner tracks and reaches a maximum of 159 bpmm on the inne

19、rmost track. 1 IS0 5653-1980 (E) Section two - Mechanical and physical characteristics 4 General requirements 4.1 Operation and storage environment 4.1.1 Operation The operating temperature - measured within the disk pack area of the drive - shall be within the range 15 OC (59 OFI to 57 OC (135 OF)

20、at a relative humidity of 8 to 80 %. The wet bulb reading shall not exceed 26 OC (79 OF). Before a disk pack is placed into operation, it shall be conditioned within its covers for a minimum of 2 h in the same environment as that in which the disk drive is operating. The time of acclimatization is d

21、ependent on the difference be- tween the disk pack temperature and the environmental temperature of the disk drive. The minimum time may be calcuiated using a temperature gradient of 10 “C (18 OFI per hour. The range specified above does not necessarily apply to the disk drive. 4.1.2 Storage The sto

22、rage temperature shall be within the range -40 OC (-40 OF) and + 65 OC (+ 150 OF), the wet bulb reading not exceeding 30 OC (86 OF). For wet bulb temperatures between 0,5 OC (33 OF) and 30 OC (86 OF) the disk pack shall be able to withstand a relative humidity of 8 to 80 %. It is recommended that th

23、e pack should not be stored under the extreme conditions of the above range. A temperature gradient of more than 10 X (18 OFI per hour should be avoided. The ambient stray magnetic field intensity shall not exceed 4 000 A/m. 4.2 Test conditions Unless otherwise stated, measurements shall be carried

24、out at 23 k 3 OC (73,4 + 5 OF), 40 % to 60 % relative humidity after 24 h of acclimatization. Tests shall be carried out with the disk pack in the upright position, unless otherwise stated. 4.3 Shock and vibration The disk pack should withstand exposure to shock and/or vibration during normal operat

25、or usage and still meet all dimensional and functional requirements of this International Standard. Protection against shock and vibration during trans- portation and storage shall be subject to agreement between supplier and user. 4.4 Material Unless otherwise stated, the disk pack shall be constru

26、cted from any suitable material in order that the dimensional, inertial 2 and other functional requirements of this International Stan- dard are complied with. The coefficient of thermal expansion of all the recording disks shall be the same. 5 Dimensional characteristics 5.1 Reference plane Unless

27、otherwise stated, all dimensions are referred to a given reference plane. This is the surface, perpendicular to the axis of the pack, on which the pack rests with its three rest buttons. 5.2 Overall external dimensions 5.2.1 Overall height (see figure 7) The overall height of the disk pack with top

28、and bottom cover shall be h, 7,14 mm (0.281 in) measured at 20 + 0,5 “C (66 f 1 OF). 5.4.5 Vertical distance of flexure pads from the reference plane from the lower end of the spindle lock. 5.5.4 Chamfer The vertical distance of the flexure pads from the reference plane shall be h, = 1,40 + 0,30 mm

29、(0.055 see IS0 1302. The hard- ness shall be 55 to 60 HRC (Rockwell scale C); see ISO/R 80. hs 1298 mm (0.511 in) from the shoulder of the spindle lock. The diameter with relaxed balls shall be ds 9,53 mm (0.375 in). 5.5.8 Location of the safety balls The centres of the safety balls shall be at a ve

30、rtical distance of h, = 9,OO k 0,32 mm (0.354 k 0.013 in) from the spindle lock shoulder. 5.5.9 Hole for the penetration of the lockshaft pin The diameter of the hole for the penetration of the drive spindle lockshaft pin into the spindle lock shall be dlo = 5,16 , T i.z mm (0.203 + i:i: in). 5.5.10

31、 Depth of penetration of the lockshaft pin The clearance for the penetration of the drive spindle lockshaft pin into the spindle lock shall extend to a distance of h, 11,81 mm (0.465 in) from the shoulder. 5.5.11 Removal of the top cover It shall be possible to remove the top cover when the lockshaf

32、t has penetrated into the spindle lock to a distance of h12 12,71 mm (0.500 in) from the shoulder. 5.5.12 Hardness The hardness in the thread area of the spindle lock shall be 55 to 60 HRC (Rockwell scale Cl; see ISO/R 80. 5.6 Bottom protective disk (see figure 9) 5.6.1 Diameter The diameter of the

33、bottom protective disk shall be d, = 360.37 f 0,25 mm (14.188 f 0.010 in). 5.6.2 Thickness The thickness of the bottom protective disk shall be e, = 130 * 0,08 mm IO.051 * 0.003 in). 5.7 Disk supports (see figure 9) The radius of all disk supports shall be r3 90,9 mm (3.58 in). 5.8 Recording disks 5

34、.8.1 Diameter (see figure 9) The diameter of all recording disks shall be d12 = 356,25 f 0,15 mm (14.025 f 0.006 in). 5.8.2 Thickness (see figure 11) The thickness of all recording disks shall be e2 = 1,905 f 0,025 mm (0.075 f 0.001 in). 5.8.3 Disk edge chamfer (see figure 11) For a distance of 0 b

35、1,3 mm (0.05 in). from the outside edge of the disk, the disk contour shall be relieved within the extended boundaries of the disk surfaces. 5.9 Top protective disk (see figure 9) 5.9.1 Diameter The diameter of the top protective disk shall be d12 = 356,25 + 0,25 mm (14.025 f 0.010 in). 5.9.2 Thickn

36、ess The thickness of the top protective disk shall be e3 = 1,27 k 0,05 mm (0.05 f 0.002 in). 5.10 Location of the disks (see figure 9) The disks shall be located with regard to the reference plane as described in 5.10.1 to 5.10.3. 5.10.1 Bottom protective disk The vertical distance between the refer

37、ence plane and the lower surface of the bottom protective disk shall be h13 = 0,56 to 1,41 mm (0.022 to 0.056 in). 4 IS0 5663-1960 (E) 5.10.2 Recording disks The vertical distances above the reference plane to the record- ing disks shall be h, = 10,478 + 0,203 mm (0.412 5 f 0.008 in), h15 = 20,003 f

38、 0,203 mm (0.787 5 * 0.008 in), h16 = 29,258 + 0,203 mm (1.162 5 f 0.008 in), h17 = 39,053 k 0,203 mm (1.537 5 f 0.008 in), h18 = 48,578 k 0,203 mm (1.912 5 + 0.008 in), hlg = 58,103 f 0,203 mm (2.287 5 + 0.008 in), h2, = 67,628 f 0,203 mm (2.662 5 + 0.008 in), h, = 77,153 f 0,203 mm (3.037 5 f 0.00

39、8 in), hz = 86,678 + 0,203 mm (3.412 5 + 0.008 in), h, = 96,203 f 0,203 mm (3.787 5 + 0.008 in). 5.10.3 Top protective disk The distance between the reference plane and the lower sur- face of the top protective disk shall be h, = 105,982 f 0,432 mm (4.172 5 f 0.017 in). 5.11 Location of the lowest e

40、lement The lowest element of the disk pack shall not extend outside an annular space defined by a distance below the reference plane of h, t7,6 mm (0.30 in) and inner and outer radii of r, = 78,0 mm (3.07 in), r5 = 96,5 mm (4.84 in). axial position limits (plus and minus tolerances) given for each s

41、urface in 4.10. This requirement shall apply to the annular area of all disk surfaces between an outer radius of 175,08 mm (6.893 in) minimum and an inner radius of 98,42 mm (3.875 in) maximum. 5.13.2 Axial runout of disks The axial runout of any disk at any rotational frequency up to the maximum al

42、lowable rotational frequency (see 6.3) shall not exceed 0,15 mm (0.006 in) for the recording disks, 0,51 mm (0.020 in) for the protective disks, total indicator reading. 5.13.3 Acceleration of axial runout With the disk pack revolving at 3 600 k 72 min-1, the ac- celeration of the axial runout of th

43、e recording disk surfaces (measured with a high frequency cut-off defined by the flat response/high frequency asymptote intercept of 5,0 kHz and a high frequency fall-off of 18 dB per octave) shall not exceed a peak acceleration from the base line of * 102 m/s2 ( + 4 000 in/ b) the -3 dB roll-off po

44、int shall be at 9,675 MHz C6fl; cl the attenuation above 9,675 MHz shall not be less than that given by a line drawn through zero at 9,675 MHz with a slope of - 18 dB/octave; d) the phase shift shall be less than k 5O between Of1 MHz and 6,45 MHz CO.06f and 4jj. 8.5.3 Transfer characteristics For in

45、puts between 0,3 mV and 10,O mV the transfer characteristic shall be linear within + 3 % or 50 pV, whichever is larger. 8.6 Automatic gain controlled amplifier The AGC-amplifier shall produce an output voltage VnGc constant to within f 2 % for input voltages from VIN, min = 0,3 mV to V,N, max = 10,O

46、 mV (see figure 14). Its response time shall be 3,4 vs. All frequencies below 10 kHz shall be attenuated at a rate of 6 dB/octave. 9 8.7 Track average amplitude V, 9.1.3 Overwrite test The track average amplitude Vrn is the average of the peak-to- peak values of the signals over one revolution of th

47、e disk measured at the output of the data test head when electrically loaded as in 8.5. 9.1.3.1 Procedure Write on track 000 at lfand measure the average amplitude of the lfsignal with a frequency-selective voltmeter. Without DC erase, overwrite once at 2f. Measure the average amplitude of the resid

48、ual lf signal with the frequency-selective voltmeter. 8.8 Test signals The recording frequencies specified as lf and 2f shall be : 9.1.3.2 Result lf = (3 225 rt 3,225) x 103 transitions/s, 2f = (6 450 f 6,450) x 103 transitions/s. The ratio Average amplitude of lf signal after overwrite Average ampl

49、itude of lf signal before overwrite shall be less than -40. 8.9 Use of DC erase Unless otherwise specified, all write operations shall be pre- ceded by a DC erase operation. 9.1.4 Residual noise test 9 Functional testing - Data surfaces 9.1.4.1 Procedure DC erase a 5-track band with data track 814 in its middle. Write at data track 814 at 2f, read back and measure the RMS value (fa 10 Acceptance criteria for data surfaces - write timing (write clock); - index sensing; 10.1 Surface test cri