ISO/IEC 14169:1995
(Main)Information technology — 90 mm flexible disk cartridges — 21 MBytes formatted capacity — ISO Type 305
Information technology — 90 mm flexible disk cartridges — 21 MBytes formatted capacity — ISO Type 305
Specifies the mechanical, physical and magnetical 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. Such flexible disk cartridges are identified as ISO type 305. Together with a standard for volume and file structure, for instance ISO/IEC 9293, it allows full data interchange between data processing systems.
Technologies de l'information — Cartouches à disquette de 90 mm — Capacité formatée de 21 MB — Type ISO 305
General Information
Standards Content (Sample)
INTERNATIONAL lSO/IEC
STANDARD 14169
First edition
1995-09-15
Information technology - 90 mm flexible
disk cartridges for information
interchange - 21 MBytes formatted
capacity - ISO Type 305
Cartouches a disquette de 90 mm pour
TechnoIogies de I ’informa tion -
I ’bhange d ’informa tion - Capacite formatke de 21 MB - Type ISO 305
Weference number
ISO/IEC 14% 691% 995(E)
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ISOIIEC 14169:1995(E)
Contents
Foreword
Introduction Page
1
Section 1 - General
1 Scope
2 Conformance
2.1 Flexible disk cartridge
2.2 Generating Systems
2.3 Receiving Systems
3 Normative references
1
4 Defini tions
1
4.1 Average Signal Amplitude
1
4.2 case
2
4.3 Data Seetor
2
4.4 Data Track
2
4.5 direction of rotation
2
4.6 disk
2
4.7 Error Correcting Code (ECC)
2
4.8 Error Detecting Code (EDC)
2
4.9 flux transition frequency
2
4.10 hub
2
4.11 index
2
4.12 Inner Zone
2
4.13 input bit
2
4.14 Line of Access of the head
2
4.15 liner
0 ISO/IEC 1995
All rights reserved. Unless otherwise specifed, no part of this publication may be reproduced
or utilized in any form or by any means, electro& or mechanical, including photocopying and
microflm, without permission in writing from the publisher.
ISO/IEC Copyright Office l Case postale 56 l CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland
ii
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ISO/IEC 14169:1995(E)
0 ISO/IEC
2
4.16 Master Standard Reference Flexible Disk Cartridge
2
4.17 Outer Zone
2
4.18 peak value
2
4.19 Primary Identification hole
2
4.20 Reference Field
2
4.21 Secondary Identification hole
2
4.22 Secondary Standard Reference Flexible Disk Cartridge
2
4.23 Seetor Block
3
4.24 sector servo
3
4.25 Servo Seetor
3
4.26 Servo Track
3
4.27 shutter
3
Side
4.28
3
4.29 Standard Reference Amplitude
3
4.30 Standard Reference Current
3
4.31 Test Recording Current
3
4.32 Typical Field
3
4.33 write-inhibit hole
3
5 Conventions and Notations
3
5.1 Representation of numbers
3
5.2 Names
4
6 Acronyms
4
7 General description
7.1 Drawings
7.2 Main elements
7.3 Description
7.4 Marking of the FDC
4
Section 2 - Environments, mechanical and physical characteristics
4
8 General requirements
4
8.1 Environment, transportation and safety
8.1.1 Testing environment
8.1.2 Operating environment
8.1.3 S torage environment
8.1.4 Transportation
8.1.5 Safety
5
8.2 Materials
8.2.1 Case
8.2.2 Liner
8.2.3 Disk
8.2.4 Hub
. . .
111
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0 ISO/IEC
ISOIIEC 14169:1995(E)
6
9 Dimensional characteristics
6
9.1 Case
6
Shape
9.1.1
6
Thickness
9.1.2
6
9.1.3 Hub access hole
6
9.1.4 Locating hole
7
9.1.5 Label area
7
Head windows
9.1.6
8
Write-inhibit hole
9.1.7
8
9.1.8 Identification holes
8
9.1.9 Profile of the shutter edge of the case
9
9.1.10 Shutter
9
9.2 Liner
9
Disk
9.3
9
9.3.1 Diameter
9
9.3.2 Thickness
9
9.4 Hub
9
Dimensions
9.4.1
10
9.4.2 Hub orientation holes
10
9.5 Optional handling notches
11
9.6 Interface between cartridge and drive
11
9.7 Compliance
11
10 Physical characteristics
11
Flammability
10.1
11
10.2 Coefficient of linear thermal expansion of the disk
11
10.3 Coefficient of linear hygroscopic expansion of the disk
11
10.4 Torque
11
10.4.1 Starting torque
11
Running torque
10.4.2
12
Section 3 - Requirements for the unrecorded disk
12
Magnetit recording characteristics
11
12
11.1 Recording area
12
11.2 Track geometry
12
11.2.1 Number of tracks
12
11.2.2 Track number
12
11.2.3 Width of Data Tracks
12
11.2.4 Data Track location
13
11.3 Functional testing
13
Test conditions
11.3.1
13
11.3.2 Typical Field
iv
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0 ISO/IEC ISO/IEC 14169:1995(E)
14
11.3.3 Average Signal Amplitude
14
11.3.4 Resolution
14
11.3.5 Peak shift
14
11.3.6 Overwrite
14
11.3.7 Modulation
14
11.4 Track quality tests
14
11.4.1 Missing pulse
15
11.4.2 Extra pulse
15
11.4.3 Requirement for tracks
15
11.4.4 Rejected cartridge
15
Section 4 - Requirements for the interchanged disk
15
12 Recording of Data Tracks
15
12.1 Method of recording
15
12.2 Tolerantes of the track locations
16
12.3 Recording offset angle
16
12.4 Density of recording
16
12.4.1 Nominal density of recording
16
12.4.2 Lang-term average Channel bit cell length
16
12.4.3 Short-term average Channel bit cell length
16
12.5 Flux transition spacing
17
Average Signal Amplitude
12.6
17
12.7 Byte
17
12.8 Data Seetor
17
12.9 Cylinder
17
12.10 Cylinder number
17
12.11 Data capacity of a track
18
12.12 Hexadecimal notation
18
13 Disk layout
20
13.1 Layout of a Data Seetor
20
13.1.1 Compensation field
20
13.1.2 Seetor Identifier
21
13.1.3 Identifier Gap
21
13.1.4 Data Block
22
13.1.5 Data Block Gap
22
13.1.6 Defective Data Seetor
22
Data Tracks
13.2
23
13.2.1 Data Tracks for the user
23
13.2.2 Data Tracks for the management of defective Data Seetors
23
13.2.3 Data Tracks for servo recovery
23
13.3 Coded representation of data
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0 ISO/IEC
ISO/IEC 14169:1995(E)
23
14 General requirements for recording Servo Tracks
23
14.1 Method of recording
23
14.2 Servo Tracks
23
14.2.1
Number of Servo Tracks
23
14.2.2
Width of Servo Tracks
24
14.2.3
Servo Track location
24
14.3 Average Signal Amplitude of servo data
24
14.4 Displacement due to fluctuations of Signal amplitude of servo data
24
15 Layout of the Servo Track
25
15.1 Layout of the Servo Seetor
26
15.1.1 Servo Identifier
26
15.1.2 Servo data
27
16 Relative Position of Data Tracks and Servo Tracks
Annexes
33
A - Cartridge distortion test gauge
34
B - Measurement of light transmittance
37
C - Test for compliance
40
D - Method for measuring the effective track width
42
E - Head and read amplifier for functional testing
43
F - Method of measuring peak shift
46
G - Method for measuring overwrite
47
H - Procedure and equipment for measuring flux transition spacing
49
- Handling of defective Data Seetors
J
50
K - Method for measuring the eccentricity of Servo Tracks
51
L - Method of measuring the offset between Data Tracks and Servo Tracks
52
M - Torque measurements
53
N - Data separators for decoding 2-7 RLL recording
54
P - EDC Implementation
56
Q - ECC Implementation
57
R - Servo Track recording conditions
s - Method for measuring the displacement of the head due to amplitude fluctuations of
58
servo data
60
T - Institute supplying Secondary Standard Reference Flexible Disk Cartridges
Vl
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0 ISO/IEC
ISO/IEC 14169:1995(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized
System for worldwide standardization. National bodies that are members of ISO 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. ISO
and IEC technical committees collaborate in fields of mutual interest. Other international organizations, govemmental and non-
govemmental, in liaison with ISO and IEC, also take part in the work.
In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTCl. Draft International
Standards adopted by the joint technical committee are 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 14169 was prepared by the Japanese Industrial Standards Committee (as StandardJIS X 6228 - 1994) with
document 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 ISO and IEC.
Annexes A to L form an integral part of this International Standard. Annexes M to T are for inforrnation only.
vii
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0 ISO/IEC
ISO/IEC 14169:1995(E)
Introduction
This International Standard specifies the characteristics of 90 mm flexible disk cartridges of 21 MBytes forrnatted capacity, recorded at
3 1 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.
This International Standard specifies the physical interchangeability of the unrecorded disk and the fomrat interchangeability of recorded
Data Tracks and Servo Tracks.
In reference to ISO/IEC 9983, flexible disk cartridges confortning to this International Standard are designated as ISO Type 305.
. . .
Vlll
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INTERNATIONAL STANDARD o ISO/IEC ISO/IEC 14169: 1995 (E)
Information technology - 90 mm flexible disk cartridges for information interchange
- 21 MBytes formatted capacity - ISO Type 305
Section 1 - General
1 Scope
This International Standard specifies the characteristics of 90 mm flexible disk cartridges (FDC) of 21 Mbytes formatted capacity,
recorded at 3 1 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 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
Servo Tracks.
Such flexible disk cartridges are identified as ISO 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 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
on 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 to 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 Parties 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 ISO maintain registers of currently valid International Standards.
ISO 683-13: 1986, Heat-treatable steels, alloy steels and free-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 9983: 1995, Information technology - Designation of unrecordedflexible disk cartridges.
IEC 950: 199 1, Safety of information technology equipment, including electrical business equipment.
4 Defini tions
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 output
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.
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0 ISO/IEC
ISOIIEC 14169:1995(E)
4.3 Data Seetor: A sector comprising a Seetor Identifier and a Data Block.
4.4 Data Track: A track on which data are recorded on Data Seetors.
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 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).
NOTE 1 - In this International Standard, the frequencies to be used in the Outer Zone are indicated by the subscript 02, those to be used in the
Inner Zone are indicated by the subscript IZ (see 11.3.1.1).
which allows torque to be transmi tted to the disk. The hub is
4.10 hub: A centring and referencing device attached to the disk
disk on the drive shaft in a unique angular Position.
attached to the centre of the disk. It ensures centring of the
4.11 index: The Signal generated in the index transducer of the drive by the drive spindle once per revolution.
4.12 Inner Zone: The inner subdivision of the recording area of a surface of the disk.
input bit: Bits which represent input data.
4.13
4.14 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 -004 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 shift, and overwrite. Tracks 000 and 325 are declared as Reference Tracks.
The reference tracks are calibrated at 600 rpm.
NOTE 2 - This Master Standard has been established at the Reliability Centre for Electronie Components of Japan (RCJ), l-1 -12 Hachiman-cho,
Higashikurume-shi, Tokyo 203, Japan.
Outer Zone: The outer subdivision of the recording area of a surface of the disk.
4.17
peak value: The zero to crest value of the output voltage of the read head.
4.18
4.19 Primary Identification hole: A through-hole provided on the case to identify the FDC specified by this International
Standard.
Reference Field: The Typical Field of the Master Standard Reference Flexible Disk Cartridge. There are two Reference
4.20
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
4.21
International Standard.
Secondary Standard Reference Flexible Disk Cartridge: A flexible disk cartridge the Performance of which is known and
4.22
stated in relation to that of the Master Standard Reference Flexible Disk Cartridge.
NOTE 3 - Secondary Standard Reference Flexible Disk Cartridges tan be ordered under part number JRM 6228 from the Reliability Centre for
Electronie Components of Japan (RCJ), 1- 1- 12 Hachiman-cho, Higashikurume-shi, Tokyo 203, Japan until the year 2004. (see annex T).
It is intended that these be used for calibrating tertiary reference disks for use in routine calibration.
Seetor Block: A block consisting of a Servo Seetor followed by either two or three Data Seetors, and a Seetor Block Gap.
4.23
2
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0 ISO/IEC ISO/IEC 14169:1995(E)
4.24 Seetor servo: A method of Position control, whereby head positioning information is recorded at the beginning of each Seetor
Block.
4.25 Servo Seetor: A sector which has a Servo Identifier and servo data.
4.26 Servo Track: A track on which Servo Seetors are permanently recorded.
4.27 shutter: A device which uncovers the head windows upon insertion of the cartridge into a drive, and automatically covers
them upon removal from the drive.
4.28 Side: Side 0 is the side engaged by the spindle. Side 1 is the opposite side.
4.29 Standard Reference Amplitude: The Standard Reference Amplitudes (SRAs) are the Average Signal Amplitudes derived
from the reference tracks of the Master Standard Reference Flexible Disk Cartridge using the Test Recording Current.
There are four SRAs, two for each side (see 11.3.1.1):
SRAl is the Average Signal Amplitude from a recording written using 3foZ at Track 000.
SRA2 is the Average Signal Amplitude from a recording written using 8frz at Track 325.
4.30 Standard Reference Current: The current that produces the Reference Field.
Test Recording Current: The current the relationship of which to the Standard Reference Current is defined for each zone
4.31
and for each flux transition frequency.
4.32 Typical Field: In the plot of the Average Signal Amplitude against the Recording Field at a specified recording density, the
minimum field that Causes an Average Signal Amplitude equal to 95% of the maximum Average Signal Amplitude.
write-inhibit hole: A through-hole with a sliding cover, provided on the case to inhibit writing on the disk when the hole
4.33
is uncovered.
5 Conventions and Notations
5.1 Representation of numbers
-
A measured value is rounded off to the least significant digit of the corresponding specified value. It implies that a specified
value of 1,26 with a positive tolerante of +O,Ol, and a negative tolerante of -0,02 allows arange of measured values from 1,235
to 1,275.
Letters and digits in parentheses represent numbers in hexadecimal notation.
The setting of a bit is denoted by ZERO or ONE.
Numbers in binar-y notation and bit combinations are represented by strings of ZEROS and ONEs.
Numbers in binary notation and bit combinations are shown with the most significant byte to the left, and with the most
significant bit in each byte to the left.
Negative values of numbers in binary notation are given in TWO ’s complement.
In each field the data is processed so that the most significant byte (byte 1) is processed first. Within each byte the least
significant bit, numbered B 1, is processed last, the most significant bit, numbered B,, is processed first. This Order of processing
applies also to the data input to the Error Detecting and Correcting circuits and to their output.
5.2 Names
The names of entities, e.g. specific tracks, fields, etc., are given with a capital initial.
3
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0 ISO/IEC
ISO/IEC 14169:1995(E)
6 Acronyms
ECC Error Correcting Code
EDC Error Detecting Code
FFT Fast Fourier Transform
LED Light Emitting Diode
Standard Reference Amplitude
SRA
SVDT Servo data
SVIDA Servo Identifier A
SVIDB Servo Identifier B
2-7 RLL 2-7 Run Length Limited (Code)
7 General description
7.1 Drawings
In the enclosed drawings:
Shows Side 0 and enlarged Cross-sections through the Location and Secondary Identification holes;
Figure 11
Figure 12 Shows Side 1;
Shows at a larger scale the top part of Side 0 without shutter;
Figure 13
Show the disk with hub;
Figures 14, 15
Figure 16 Shows the interface between the cartridge and the drive.
7.2 Main elements
The main elements of the flexible disk cartridge are
-
the disk,
-
the liner,
-
the case.
7.3 Description
The case is of a substantially Square form. It includes a central hole on one side, head windows covered by a shutter on both sides,
identification holes and a write-inhibit hole.
The liner is provided between the case and the disk. It comprises two layers of material between which the disk lies. The disk has a
central hole with a metal hub attached.
7.4 Marking of the FDC
It is recommended that the case be clearly marked with the ISO Type No. ISO 305 of the FDC.
Section 2 - Environments, mechanical and physical characteristics
8 General requirements
8.1 Environment, transportation and safety
8.1.1 Testing environment
Tests and measurements made on the cartridge to check the requirements of this International Standard shall be carried out under the
following conditions:ISO
23 OC + 2 OC
temperature:
40 % to 60 %
relative humidity:
24 h min.
conditioning before testing:
4
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0 ISO/IEC
ISO/IEC 14169:1995(E)
For the tests specified in 11.3 the temperature and relative humidity shall be measured in the air immediately surmunding the cartridge
drive. For all other tests the temperature and the relative humidity shall be measured in the air immediately surmunding the cartridge.
The stray magnetic field at any Point on the disk surface, including that resulting from the concent.nhg effect of the magnetic head,
shall not exceed 4 000 A/m.
8.1.2 Operating environment
Cartridges used for data interchange shall be capable of operating under the following conditions:
temperature: 10 OC to 51,5 OC
relative humidity: 20 % to 80 %
wet bulb temperature: less than 29 OC
the relative humidity shall be measured in the air
The temperature and immediately surrounding the cartridge. It is recommended that
the rate of Change of the temperature should not exceed 20 OC per h.
There shall be no deposit of moisture on or in the cartridge.
The stray magnetic field at any Point on the disk surface, including that resulting from the concentrating effect of the magnetic head,
shall not exceed 4 000 A/m.
8.1.3 Storage environment
During storage the cartridges shall be kept within the following conditions:
temperature: 4 “C to 53 “C
relative humidity: 8 % to 90 %
The ambient stray magnetic field shall not exceed 4 000 A/m. There shall be no deposit of moisture on or in the cartridge.
NOTE 4 - Cartridges which have been stored at temperatures and humidities exceeding the operating performante
conditions may exhibit degraded
characteristics. Such cartridges should be subjected to a conditioning period of not less than 24 h within the operating environment Prior to use.
8.1.4 Transportation
Responsibility for ensuring that adequate precautions are taken during the transportation shall be with the sender. The cartridge shall
be in a protective package free from dust or extraneous matter. It is recommended that a sufficient space exists between cartridge and
outer surface of the final Container, so that risk of erasure due to stray magnetic fields will be negligible.
It is recommended that the following conditions are not exceeded:
temperature: -40 OC to 60 OC
maximum rate of temperature Change: 20 OC per h
relative humidity: 8 % to 90 %
There should be no deposit of moisture on or in the cartridge.
8.1.5 Safety
The flexible disk cartridge and its components shall satisfy the requirements of IEC 950.
8.2 Materials
8.2.1 Case
The case may be constructed from any sui table material such that it meets the requirements of 9.7.
8.2.2 Liner
The material of the liner shall be able to retain dust or debris without darnage to the disk.
8.2.3 Disk
The d isk may be constructed from any suitable material e. . bi-axially oriented polyethylene terephthalate) coated on both sides with
( 8
.es).
a flex .ible layer of magnetic material (e.g. metal particl
8.2.4 Hub
The hub shall be made of any suitable material (e.g. stainless steel alloy according to ISO 683-13, type 8).
5
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0 ISO/IEC
ISOIIEC 14169:1995(E)
9 Dimensional characteristics
9.1
Case
The dimensions of the cartridge are referred to two Reference Axes X and Y. They are two lines in space intersecting at right angles.
The plane they define is the Reference Plane XY of the cartridge (figures 11 and 12).
9.1.1 Shape
The case has a rectangular form, its sides shall be
2, = 94,0 mm*O,3 mm
+ 0,4
22 = 90,o nm0 lI=
The radius of three of its comers shall be
r1 = 2,Omm* 1,Omm
The angle of its fourth comer shall be
w=45"+2"
9.1.2 Thickness (figure 12)
In the area extending 8,5 mm from each of the two edges as shown in figure 12, the thickness of the case shall be
el= 3,3 mm+O,2 mm
When the cartridge is inserted in the test gauge specified in annex A, a forte of 0,2 N maximum, applied to the centre of the back edge
shall Cause the cartridge to pass through the gauge.
The edge radius shall be
r2= 0,40mmf0,25 mm
9.1.3 Hub access hole (figure 11)
On Side 0 there shall be a hub access hole, the diameter of which shall be
d, = 26,50 mm min.
The Position of the centre of this hole shall be defined by
2, = 40,OO mm + 0,15 mm
Z4 = 31,00 mm + 0,15 mm
Locating holes (figures 11 and 13)
9.1.4
9.1.4.1 Primary Locating hole
The centre of the Primary Locating hole shall be at the intersection of Reference Axes X and Y.
Its diameter shall be
dz= 3,6 mmk 0,l mm
The dimensions of its section (see Cross-section A-A in figure 11) shall be
d, = 1,5 mmmin.
I, = 0,2 mm + 0,l mm
Z9 = 1,Ommmin.
Z,, = 2,5 mm min.
6
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0 ISO/IEC ISO/IEC 14169:1995(E)
9.1.4.2 Secondary Locating hole
The centre of the Secondary Locating hole shall be on Reference Axis X, its distance from Reference Axis Y shall be
Z5 = 80,O mmf0,2 mm
It shall have a substantially rectangular shape. Its short axis shall be (see Cross-section B-B in figure 11)
Z6 = 3,6 mm + 0,l mm
Its long axis shall be
27 = 4,4 mm*o,2mm
The dimensions d,, Z,, l9 and I,, of the Cross-section of the Secondary Locating hole are as specified in 9.1.4.1.
9.1.5 Label area
9.1.5.1 Side 0 (figure 11)
The locations and dimensions of the label area of Side 0 shall be defined by
I,, = 3,5 mm min.
Z,,= 76,5 mmmax.
I,, = 60,O mm min.
9.1.5.2 Side 1 (figure 12)
The locations and dimensions of the label area of Side 1 shall be defined by
Z,, = 3,5 mm min.
I,, = 76,5 mm max.
Z,, = 20,O mm min.
Head windows (figure 13)
9.1.6
The locations and dimensions of the two head windows are specified by the same set of dimensions.
9.1.6.1 Location
The location of the head windows shall be defined by
I,, = 12,3 mm min.
Z,, = 11,5 mrn min.
21, = 35,5 mm+o,2mm
9.1.6.2 Dimensions
The width of the head windows shall be
21, = 9,OOmmkO,2Omm
The radius of their comers shall be
‘3 = 0,5 nun It 0,l mm
‘4 = 0,5 mm + 0,l mm
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ISOIIEC 14169:1995(E) 0 ISO/IEC
9.1.7 Write-inhibit hole (figures 11 and 12)
The write-inhibit hole is intended for useeither with amechanical switch or with anoptical detector so that only when the hole is covered
is writing on the disk possible. When covered, the closure device shall not extend outside the Reference Plane nor shall it deflect by
more than 0,3 mm fiom the Reference Plane inside the case under the action of a forte of 3 N.
Also when covered, the light transmittance of the write-inhibit hole area shall not exceed 1 %, when measured with an Optical System
such as described in annex B.
NOTE 5 - The position of write-inhibit hole is reversed compared with that of the cartridges specified by ISO 8860, ISO 9529 and ISO/IEC 10994 ; and it
agrees with the position specified in ISO/IEC 13422.
9.1.7.1 Location
The centre of the write-inhibit hole shall be specified by Zs and
219 = 67,75 mm+o,25 mm
9.1.7.2 Dimensions
The dimensions of the write-inhibit hole shall be
Zb9 = 35 mm min.
I,, = 4,0 mm min.
9.1.8 Identification holes (figures 11 to 13)
The Identification holes are provided to distinguish between the FDC according to this International Standard from those specified by
ISO 8860, ISO 9529, ISO/IEC 10994 and ISO/EC 13422.
NOTE 6 - As the Secondary Identification hole is not a through-hole, it is recommended that the Identification holes be detected by mechanical means.
9.1.8.1 Primary Identification hole
The Position of the centre of the Primar-y Identification hole shall be on Reference Axis Y. Its distance from Reference Axis X shall
be specified by I,,.
The dimensions of the Primary Identification hole shall be
Z20 = 35 mm min.
Z21 = 4,0 mm min.
9.1.8.2 Secondary Identification hole
The Position of the centre of the Secondary Identification hole shall be
I, = 7,50 mm -f: 0,15 mm
261 = 69,O mm+o,2 mm
Its diameter shall be
d,, = 3,5 mm min.
The dimensions of its section (see Cross-section C-C in figure 11) shall be specified by I, and
ZG2 = 2,5 mm min.
Profile of the shutter edge of the case (figures 11 and 13)
9.1.9
The edge on which the shutter is mounted shall have a Profile defined by the following dimensions:
122= 80,O mmf0,2 mm
$3 = 76,O mmkO,3 mm
Z24 = 68,0 mm+O,3 mm
Zz = 64,50 mm * 0,35 mm
126 = 57,00 mm * 0,35 mm
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0 ISO/IEC
ISO/IEC 14169:1995(E)
Z27 = 55,5 mm f0,6 mm
Z2* = 3,5 mm min.
Z29 = 17,5 mm + 0,2 mm
23, = 17,00 mm + 0,15 mm
Z,, = 15,50 mrn + 0,25 mm
Zb5 = 12,50 mm * 0,25 mm
a =45 ”Ik2”
ß = 135 ”+ 2”
9.1.10 Shutter (figures 12 and 13)
The shutter shall slide upon insertion of the cartridge into the drive so as to uncover the head windows, and close automatically upon
removal. The maximum resistance forte at the fully open Position shall be 1 N, and the minimum resistance forte at the fully closed
Position shall be 0,2 N.
The path along which the shutter tan slide is defined by 2, and Z,,.
In the open Position of the shutter, the distance from its leading edge to the Reference Axis Y shall be
Z,, = 53,75 mm 21 1,25 nun
The width of the windows of the shutter shall be
I,, = 12,0 mm + 0,2 mm
NOTE 7 - It is a requirement that the drive shall provide a mechanism cartridge into the drive causes the to slide so
as to uncover the head
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