BS ISO/IEC 10090:1992

1 Scope
2 Conformance
3 Normative reference
4 Definitions
4.1 case
4.2 cyclic redundancy check (CRC)
4.3 embossed mark
4.4 entrance surface
4.5 error correction code (ECC)
4.6 field
4.7 format
4.8 groove
4.9 interleaving
4.10 Kerr rotation
4.11 land and groove
4.12 mark
4.13 optical disk
4.14 optical disk cartridge (ODC)
4.15 polarization
4.16 recording layer
4.17 Reed-Solomon code
4.18 rewritable optical disk
4.19 sector
4.20 substrate
4.21 track
4.22 zone
5 Conventions and notations
5.1 Representation of numbers
5.2 Names
6 List of acronyms
7 General description of the optical disk cartridge
8 General requirements
8.1 Environments
8.2 Temperature shock
8.3 Safety requirements
8.4 Flammability
9 Reference Drive
9.1 Optical system
9.2 Optical beam
9.3 Read channels
9.4 Tracking
9.5 Rotation of the disk
Section 2 - Mechanical and physical characteristics
10 Dimensional and physical characteristics of the
       case
10.1 General description of the case
10.2 Reference planes of the case
10.3 Dimensions of the case
10.4 Mechanical characteristics
11 Dimensional, mechanical and physical
       characteristics of the disk
11.1 General description of the disk
11.2 Reference axis and plane of the disk
11.3 Dimensions of the disk
11.4 Mechanical characteristics
11.5 Optical characteristics
12 Interface between cartridge and drive
12.1 Clamping method
12.2 Clamping force
12.3 Capture cylinder (see figure 14)
12.4 Disk position in operating condition (see figure
       14)
Section 3 - Format of information
13 Track geometry
13.1 Track shape
13.2 Direction of rotation
13.3 Track pitch
13.4 Track number
14 Track format
14.1 Track layout
14.2 Radial alignment
14.3 Sector Number
15 Sector format
15.1 Sector layout
15.2 Sector Mark
15.3 VFO fields
15.4 Address Mark (AM)
15.5 ID fields
15.6 Postambles (PA)
15.7 Offset Detection Field (ODF)
15.8 Gap
15.9 Sync
15.10 Data field
15.11 Buffer field
16 Recording code
17 Format of the Information Zone
17.1 General description of the Information Zone
17.2 Division of the Information Zone
18 Format of the Data Zone
18.1 Defect Management Areas (DMAs)
18.2 Disk Definition Sector (DDS)
18.3 Rewritable Zone
18.4 Embossed Zone
19 Defect management in the Rewritable Zone
19.1 Initialization of the disk
19.2 Certification
19.3 Disks not certified
19.4 Write procedure
19.5 Primary Defect List (PDL)
19.6 Secondary Defect List (SDL)
Section 4 - Characteristics of embossed information
20 Method of testing
20.1 Environment
20.2 Use of the Reference Drive
20.3 Definition of signals
21 Signals from grooves
21.1 Cross-track signal
21.2 Cross-track minimum signal
21.3 Push-pull signal
21.4 Divided push-pull signal
21.5 On-track signal
21.6 Phase depth
21.7 Track location
22 Signals from Headers
22.1 Sector Mark
22.2 VFO1 and VFO2
22.3 Address Mark, ID field and Postamble
23 Signals from embossed Recording fields
Section 5 - Characteristics of the recording layer
24 Method of testing
24.1 Environment
24.2 Reference Drive
24.3 Write conditions
24.4 Erase conditions
24.5 Definition of signals
25 Magneto-optical characteristics
25.1 Figure of merit
25.2 Imbalance of the magneto-optical signal
26 Write characteristics
26.1 Resolution
26.2 Narrow-band signal-to-noise ratio
26.3 Cross-talk
27 Erase characteristics
Section 6 - Characteristics of user data
28 Method of testing
28.1 Environment
28.2 Reference Drive
29 Minimum quality of a sector
29.1 Headers
29.2 User-written data
29.3 Embossed data
30 Data interchange requirements
30.1 Tracking
30.2 User-written data
30.3 Embossed data
30.4 Quality of disk
Annexes
A Edge distortion test
B Compliance test
C Track deviation measurement
D CRC for ID fields
E Format of the Data field of a sector
F Contents of the Control Zones
G Guidelines for sector replacement
H Measurement of the figure of merit
J Read power, write power and erase power
K Test method for measuring the absorbent force of
       the hub
L Derivation of the operating climatic environment
M Air cleanliness class 100 000
N Position of the cartridge relative to the
       reference planes
P Transportation
Q Office environment
R Relaxation by zones of the requirements for
       signals

Specifies the characteristics of 90mm optical disk cartridges (ODCs) of the type providing for data to be read, written and erased many times using the magneto-optical and thermo-magnetic effects. Coverage includes: mechanical and physical characteristics; format of information; characteristics of embossed information; characteristics of the recording layer; characteristics of user data. Also includes detailed annexes.

This International Standard specifies

• the conditions for conformance testing and the Reference Drive;

• the mechanical and physical characteristics of the cartridge, so as to provide mechanical interchangeability between data processing systems;

• the format of the information on the disk, both embossed and user-written;

• the characteristics of the embossed information on the disk;

• the magneto-optical characteristics of the disk, enabling processing systems to write data onto the disk;

• the minimum quality of user-written data on the disk, enabling data processing systems to read data from the disk.