ISO/IEC 16825:1999
(Main)Information technology — Case for 120 mm DVD-RAM disks
Information technology — Case for 120 mm DVD-RAM disks
This International Standard specifies the characteristics of a case for use with 120 mm DVD-RAM disks as specified in ISO/IEC 16824. This International Standard specifies three related, but different implementations of such cases, viz. Type 1 Provides a case for a one-sided (Type 1S) or a two-sided (Type 2S) DVD-RAM disk such that the disk can not be removed from the case. This case is reversible. Type 2 Provides a case for a one-sided DVD-RAM disk (Type 1S) such that the disk may be removed from the case. This case is not reversible. Type 3 Provides a case into which a one-sided DVD-RAM disk (Type 1S) may be inserted, then used as a cartridge. This case is not reversible. This International Standard specifies - the environments in which the cases are to be operated and stored; - the dimensional and mechanical characteristics of the case, so as to provide mechanical interchangeability between data processing systems; This International Standard provides for mechanical interchange between optical disk drives. Together with 120 mm DVD-RAM disks according to ISO/IEC 16824 and a standard for volume and file structure, it provides for full data interchange between data processing systems.
Technologies de l'information — Coffret pour disques DVD-RAM de diamètre 120 mm
General Information
Standards Content (Sample)
INTERNATIONAL ISO/IEC
STANDARD 16825
First edition
1999-05-15
Information technology — Case for 120 mm
DVD-RAM disks
Technologies de l'information — Coffret pour disques DVD-RAM de
diamètre 120 mm
Reference number
B C
Contents Page
Section 1 - General 1
1 Scope 1
2 Conformance 1
3 Normative references 1
4 Definitions 1
4.1 Cartridge 1
4.2 Case 1
5 Conventions and notations 1
5.1 Representation of numbers 1
5.2 Names 2
6 General description of the case 2
6.1 General description of the Type 1 case 2
6.2 General description of the Type 2 case 2
6.3 General description of the Type 3 case 2
7 General requirements 3
7.1 Environments 3
7.1.1 Test environment 3
7.1.2 Operating environment 3
7.1.3 Storage environment 4
7.1.4 Transportation 4
7.2 Temperature shock 4
7.3 Safety requirement 4
7.4 Flammability 4
Section 2 - Dimensional and Mechanical characteristics of the case 4
8 Dimensional characteristics 4
8.1 Dimensions of the Type 1 case 4
8.1.1 Overall dimensions 4
© ISO/IEC 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
ISO/IEC Copyright Office • Case postale 56 • CH-1211 Genève 20 • Switzerland
Printed in Switzerland
ii
ISO/IEC ISO/IEC 16825:1999 (E)
8.1.2 Location hole 6
8.1.3 Alignment hole 6
8.1.4 Reference surfaces 6
8.1.5 Insertion slots 7
8.1.6 Detents 7
8.1.7 Gripper slots 8
8.1.8 Write-inhibit hole 8
8.1.9 Sensor holes 8
8.1.10 Sensing areas 9
8.1.11 Spindle and head windows 9
8.1.12 Shutter shape 10
8.1.13 Path for shutter opener 11
8.1.14 Label area 11
8.1.15 Identification marks for Sides A and B 11
8.2 Dimensions of the Type 2 case 23
8.2.1 Overall dimensions 23
8.2.2 Location hole 24
8.2.3 Alignment hole 24
8.2.4 Reference surfaces 24
8.2.5 Insertion slot 25
8.2.6 Detents 25
8.2.7 Gripper slots 26
8.2.8 Write-inhibit hole 26
8.2.9 Sensor holes 26
8.2.10 Sensing areas 27
8.2.11 Spindle and head windows 27
8.2.12 Shutter shape 28
8.2.13 Path for shutter opener 29
8.2.14 Label area 29
8.2.15 Identification mark for Side A 29
8.2.16 Opening and opening cover for taking the disk out of the case 30
8.3 Dimensions of the Type 3 case 40
8.3.1 Sensor holes 41
8.3.2 Opening and opening cover 41
9 Mechanical characteristics 41
9.1 Material 41
9.2 Mass 41
9.3 Edge distortion 41
9.4 Compliance 41
9.5 Shutter opening force 41
10 Interface between the case used as cartridge and a drive 41
10.1 Capture cylinder 41
10.2 Inner dimensions of the case 42
iii
11 Orientation of the disk in the case 44
11.1 Two-sided disk (Type 2S) in case Type 1 44
11.2 One-sided disk (Type 1S) in case Types 1, 2 and 3 44
Annexes
A - Position of the case relative to the Reference Planes 45
B - Edge distortion test 46
C - Compliance test 48
D - Examples of an opening cover for Type 2 or Type 3 cases 50
E - Transportation 52
iv
ISO/IEC ISO/IEC 16825:1999 (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, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. 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.
This International Standard was prepared by JISC (as Standard JIS X 6244-1998) with document support and contribution
from ECMA and was adopted, under a special “fast-track procedure”, by Joint Technical Committee ISO/IEC JTC 1,
Information technology, in parallel with its approval by national bodies of ISO and IEC.
Annexes A to C form a normative part of this International Standard. Annexes D and E are for information only.
.
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©
INTERNATIONAL STANDARD ISO/IEC ISO/IEC 16825:1999 (E)
Information technology — Case for 120 mm DVD-RAM disks
Section 1 - General
1 Scope
This International Standard specifies the characteristics of a case for use with 120 mm DVD-RAM disks as specified in
ISO/IEC 16824. This International Standard specifies three related, but different implementations of such cases, viz.
Type 1 Provides a case for a one-sided (Type 1S) or a two-sided (Type 2S) DVD-RAM disk such that the disk can
not be removed from the case. This case is reversible.
Type 2 Provides a case for a one-sided DVD-RAM disk (Type 1S) such that the disk may be removed from the
case. This case is not reversible.
Type 3 Provides a case into which a one-sided DVD-RAM disk (Type 1S) may be inserted, then used as a
cartridge. This case is not reversible.
This International Standard specifies
- the environments in which the cases are to be operated and stored;
- the dimensional and mechanical characteristics of the case, so as to provide mechanical interchangeability between data
processing systems;
This International Standard provides for mechanical interchange between optical disk drives. Together with 120 mm
DVD-RAM disks according to ISO/IEC 16824 and a standard for volume and file structure, it provides for full data
interchange between data processing systems.
2 Conformance
A claim of conformance with this International Standard shall specify the Type implemented. A case shall be in conformance
with this International Standard if it meets the mandatory requirements specified herein for its Type.
3 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this
International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not
apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of
applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the
normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.
IEC 950:1991, Safety of information technology equipment.
ISO/IEC 16824:1999, Information technology — 120 mm DVD rewritable disk (DVD-RAM).
4 Definitions
For the purposes of this International Standard, the following definitions apply.
4.1 Cartridge: A device consisting of a case containing a rewritable disk.
4.2 Case: The housing for an optical disk, that protects the disk and facilitates disk interchange.
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. For instance, it implies that
a specified value of 1,26 with a positive tolerance of + 0,01 and a negative tolerance of - 0,02 allows a range of measured
values from 1,235 to 1,275.
5.2 Names
The names of entities, e.g. specific sides, etc. are given a capital initial.
6 General description of the case
6.1 General description of the Type 1 case (Figure 1)
The case is a rigid protective container of rectangular shape. Sides A and B of the case are identical as far as the features given
here are concerned. References to Sides A and B of the case can be changed to B or A respectively. When the opening of the
one is a head and spindle window for the spindle and the optical head of the drive, that of the other is an access window for the
disk clamping apparatus. A shutter uncovers the windows upon insertion into the drive, and automatically covers them upon
removal from the drive. The case has features that enable a drive to reject a mis-inserted cartridge, to inhibit writing, sensor
holes, detents for autoloading and a vertical use, gripper slots for an autochanger, label areas and side identification marks.
Sides A and B of the case have the same configuration.
6.2 General description of the Type 2 case (Figure 2)
The Type 2 case has the same features as the Type 1 case, but with some differences. The shape of the case is different on Side
A and on Side B. Side A does not need to have a location hole, an alignment hole, Reference Surfaces, a write-inhibit hole,
sensor holes and sensing areas. The case has an opening closed by a cover. This cover can be opened. In open position, the
disk can be taken out of the case. Sensor hole A1 is originally closed. When the disk has been removed from the case, then this
hole remains permanently open, indicating that the original disk contained in the case has been removed at least once or has
been replaced by another disk.
6.3 General description of the Type 3 case (Figure 2)
The Type 3 case is identical with Type 2 case except that the sensor hole A1 is always open.
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ISO/IEC ISO/IEC 16825:1999 (E)
Case Side A
Identification mark
of Case Side A
Edge for the shutter opener
Disk Side B
Shutter
Detent for
autoloading
Detent for vertical use
Insertion slot
Spindle and head windows
Label area
Opening cover
Gripper slot
97-0093-A
Figure 2 - General view of the Type 2 and Type 3 cases, seen from Side A
7 General requirements
7.1 Environments
7.1.1 Test environment
The test environment is the environment where the air immediately surrounding the case has the following properties:
Temperature : 23 °C ± 2 °C
Relative humidity : 50 % ± 5 %
Atmospheric pressure : 86 kPa to 106 kPa
No condens ation on or in the case or cartridge shall occur. Before testing, the case or cartridge shall be conditioned in this
environment for 48 hours minimum.
Unless otherwise stated, all tests and measurements shall be made in this test environment.
7.1.2 Operating environment
This International Standard requires that a case which meets all requirements of this International Standard in the specified test
environment provides mechanical interchange over the specified ranges of environmental parameters in the operating
environment. When the case according to this International Standard contains a DVD-RAM disk according to International
Standard ISO/IEC 16824, they constitute together a cartridge. This cartridge shall meet the requirements of this clause and
provides for data interchange.
The operating environment is the environment where the air immediately surrounding the case or cartridge has the following
properties:
Temperature : 5 °C to 60 °C
Relative humidity : 3 % to 85 %
3 3
Absolute humidity : 1 g/m to 30 g/m
Temperature gradient : 10 °C /h max.
Relative humidity gradient : 10 %/h max.
No condensation on or in the case or cartridge shall occur. If the case or cartridge has been exposed to conditions outside those
specified in this clause, it shall be acclimatized in the operating environment for at least 2 h before use.
7.1.3 Storage environment
The storage environment is defined as an environment where the air immediately surrounding the case or cartridge has the
following properties.
Temperature : -10 °C to 50 °C
Relative humidity : 3 % to 85 %
3 3
Absolute humidity : 1 g/m to 30 g/m
Atmospheric pressure : 75 kPa to 106 kPa
Temperature gradient : 10 °C /h max.
Relative humidity gradient : 10 %/h max.
No condensation on or in the case or cartridge shall occur.
7.1.4 Transportation
This International Standard does not specify requirements for transportation; guidance is given in annex E.
7.2 Temperature shock
The case shall be withstand a temperature shock of up to 20°C when inserted into, or removed from, the drive.
7.3 Safety requirement
The case shall satisfy the safety requirements of Standard IEC 950, when used in the intended manner or in any foreseeable
use in an information processing system.
7.4 Flammability
Th e case shall be made from materials that comply with the flammability class for HB materials, or better, as specified in
IEC 950.
Section 2 - Dimensional and Mechanical characteristics of the case
8 Dimensional characteristics
The dimensions of the case shall be referred to three orthogonal Reference Planes X, Y and Z. The case shall be constrained
such that four reference surfaces S1 to S4 on Side B of the case lie in Reference Plane Z. The intersection of the three planes
defines the centre of the location hole. The centre of the alignment hole shall lie on the intersection of Reference Planes X and
Z. Refer to annex A. A dimension of a feature referenced to one of the planes is the shortest distance from the feature to the
plane.
Side A of the Type 1 case is referred to the three orthogonal Reference Planes X, Y' and Z', where
- Y' is a plane parallel to Reference Plane Y at a nominal distance of 102,0 mm,
- Z' is a plane parallel to Reference Plane Z at a nominal distance of 8,0 mm.
8.1 Dimensions of the Type 1 case
The dimensions of the Type 1 case shall be measured in the test environment. The dimensions of the case in an operating
environment can be estimated from the dimensions specified in this clause.
8.1.1 Overall dimensions (Figure 3)
The total length of the case shall be
ISO/IEC ISO/IEC 16825:1999 (E)
L = 135,5 mm ± 0,4 mm.
The distance from the top of the case to Reference Plane X shall be
+ 0,3 mm
L = 112,5 mm
- 0,2 mm
with the width
L = 3,6 mm min.
from the left-hand and right-hand edges of the case.
The distance from the botto
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