BS ISO/IEC 11560:1992

1 Scope
2 Conformance
3 Normative references
4 Definitions
   4.1 case
   4.2 clamping zone
   4.3 control track
   4.4 cyclic redundancy check (CRC)
   4.5 defect management
   4.6 disk reference plane
   4.7 entrance surface
   4.8 error correction code (ECC)
   4.9 format
   4.10 hub
   4.11 interleaving
   4.12 Kerr rotation
   4.13 land and groove
   4.14 mark
   4.15 optical disk
   4.16 optical disk cartridge (ODC)
   4.17 polarization
   4.18 pre-recorded mark
   4.19 read power
   4.20 recording layer
   4.21 Reed-Solomon code
   4.22 spindle
   4.23 substrate
   4.24 track
   4.25 track pitch
   4.26 write-inhibit hole
   4.27 write once optical disk
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
         8.1.1 Testing environment
         8.1.2 Operating environment
         8.1.3 Storage environment
         8.1.4 Transportation
9 Safety requirements
10 Dimensional and mechanical characteristics of
         the case
   10.1 General description of the case
   10.2 Case drawings
   10.3 Sides, references axes and reference planes
         10.3.1 Relationship of Sides A and B
         10.3.2 Reference axes and case reference planes
   10.4 Materials
   10.5 Mass
   10.6 Overall dimensions
   10.7 Location hole
   10.8 Alignment hole
   10.9 Surfaces on reference planes P
   10.10 Insertion slots and detent features
   10.11 Gripper slots
   10.12 Write-inhibit holes
   10.13 Media sensor holes
   10.14 Head and motor window
   10.15 Shutter
   10.16 Slot for shutter opener
   10.17 Shutter sensor notch
   10.18 User label areas
11 Dimensional and physical characteristics of the
         disk
   11.1 Dimensions of the disk
         11.1.1 Outer diameter
         11.1.2 Thickness
         11.1.3 Clamping zone
         11.1.4 Clearance zone
   11.2 Mass
   11.3 Moment of inertia
   11.4 Imbalance
   11.5 Axial deflection
   11.6 Axial acceleration
   11.7 Dynamic radial runout
   11.8 Radial Acceleration
   11.9 Tilt
12 Drop test
13 Interface between disk and drive
   13.1 Clamping technique
   13.2 Dimensions of the hub
         13.2.1 Outer diameter of the hub
         13.2.2 Height of the hub
         13.2.3 Diameter of the centre hole
         13.2.4 Height of the top of the centre hole at
                  diameter D9
         13.2.5 Centring length at diameter D9
         13.2.6 Chamfer at diameter D9
         13.2.7 Chamfer at diameter D8
         13.2.8 Outer diameter of the magnetizable ring
         13.2.9 Inner diameter of the magnetizable ring
         13.2.10 Thickness of the magnetizable material
         13.2.11 Position of the top of the magnetizable ring
                  relative to the disk reference plane
   13.3 Magnetizable material
   13.4 Clamping force
   13.5 Capture cylinder for the hub
   13.6 Disk position in the operating condition
14 Characteristics of the substrate
   14.1 Index of refraction
   14.2 Thickness
15 Characteristics of the recording layer
   15.1 Test conditions
         15.1.1 General
         15.1.2 Read conditions
         15.1.3 Write conditions
         15.1.4 Erase conditions
   15.2 Baseline reflectance
         15.2.1 General
         15.2.2 Actual value
         15.2.3 Requirement
   15.3 Magneto-optical recording in the User Zone
         15.3.1 Resolution
         15.3.2 Imbalance of magneto-optical signal
         15.3.3 Figure of merit for magneto-optical signal
         15.3.4 Narrow-band signal-to-noise ratio
         15.3.5 Cross-talk ratio
         15.3.6 Ease of erasure
16 Disk format
   16.1 Track geometry
         16.1.1 Track shape
         16.1.2 Direction of rotation
         16.1.3 Track pitch
         16.1.4 Track number
   16.2 Formatted Zone
   16.3 Control Tracks
   16.4 Control track PEP Zone
         16.4.1 Recording in the PEP Zone
         16.4.2 Cross-track loss
         16.4.3 Format of the tracks of the PEP Zone
   16.5 Control Track SFP Zones
         16.5.1 Duplicate of the PEP information
         16.5.2 Media information
         16.5.3 System information
         16.5.4 Unspecified content
   16.6 Requirements for interchange of a User-Recorded
         cartridge
         16.6.1 Requirements for reading
         16.6.2 Requirements for writing and erasing
17 Track format
   17.1 Track layout
         17.1.1 Tracking
         17.1.2 Characteristics of pre-recorded information
   17.2 Sector format
         17.2.1 Sector Mark (SM)
         17.2.2 VFO areas
         17.2.3 Address Mark (AM)
         17.2.4 ID and CRC
         17.2.5 Postamble (PA)
         17.2.6 Offset Detection Field (ODF)
         17.2.7 Gap
         17.2.8 Flag
         17.2.9 Auto Laser Power Control (ALPC)
         17.2.10 Sync
         17.2.11 Data field
         17.2.12 Buffer
   17.3 Recording code
   17.4 Defect management
         17.4.1 Media initialization
         17.4.2 Write and read procedure
         17.4.3 Layout of the User Zone
         17.4.4 Summary of the location of the zones on the
                  disk
Annexes
A Optical system for measuring write, read and
   erase characteristics
B Definition of write and erase pulse width
C Measurement of figure of merit
D Values to be implemented in existing and
   future standards
E Guidelines for the use of ODCs
F CRC for ID fields
G Interleave, CRC, ECC, Resync for the Data field
H Sector retirement guidelines
J Office environment
K Transportation
L Requirements for interchange

Specifies the characteristics of 130mm optical disk cartridges (ODC) which provide for the disk to be initialised once, and the information to be written once only and read many times, using the magneto-optical effect. Coverage includes definitions, conventions and notations, safety requirements, drop test, disk format and track format. Also includes detailed annexes.

This International Standard specifies

• definitions of the essential concepts;

• the environment in which the characteristics are to be tested;

• the environments in which the cartridge are to be operated and stored;

• the mechanical, physical and dimensional characteristics of the case and of the optical disk;

• the magneto-optical characteristics and the recording characteristics for initializing the disk once, for recording the information once, for reading it many times, so as to provide physical interchangeability between data processing systems;

• the format for the physical disposition of the tracks and sectors, the error correction codes, the modulation method used for recording and the quality of the recorded signals.