ANSI INCITS 220 : 1992 : R2002

Foreword
1 Scope and purpose
   1.1 Scope
   1.2 Description of cartridge
   1.3 Conformance
   1.4 Conventions and notations
2 Normative references
3 Definitions
   3.1 case
   3.2 clamping zone
   3.3 control track
   3.4 cyclic redundancy check (CRC)
   3.5 defect management
   3.6 disk reference plane
   3.7 entrance surface
   3.8 error correction code (ECC)
   3.9 format
   3.10 hub
   3.11 interleaving
   3.12 Kerr rotation
   3.13 land and groove
   3.14 mark
   3.15 optical disk
   3.16 optical disk cartridge
   3.17 polarization
   3.18 Pre-recorded information
   3.19 Read Power
   3.20 Recording layer
   3.21 Reed-Solomon code
   3.22 spindle
   3.23 substrate
   3.24 track
   3.25 track pitch
   3.26 write-inhibit hole
   3.27 Write Once optical disk
4 List of acronyms
5 Environments
   5.1 Testing environment
   5.2 Operating environment
   5.3 Storage environment
   5.4 Transportation
6 Safety requirements
7 Dimensional and mechanical characteristics of the case
   7.1 General
   7.2 Case drawings
   7.3 Slides, reference axes, and reference planes
   7.4 Materials
   7.5 Mass
   7.6 Overall dimensions
   7.7 Location hole
   7.8 Alignment hole
   7.9 Surfaces for reference planes P
   7.10 Insertion slots and detent features
   7.11 Gripper slots
   7.12 Write-inhibit holes
   7.13 Media sensor holes
   7.14 Head and motor window
   7.15 Shutter
   7.16 Slot for shutter opener
   7.17 Shutter sensor notch
   7.18 User label areas
8 Dimensional and physical characteristics of the disk
   8.1 Dimensions of the disk
   8.2 Mass
   8.3 Moment of inertia
   8.4 Imbalance
   8.5 Axial deflection
   8.6 Axial acceleration
   8.7 Dynamic radial runout
   8.8 Radial acceleration
   8.9 Tilt
9 Drop test
10 Interface between disk and drive
   10.1 Clamping technique
   10.2 Dimensions of the hub
   10.3 Magnetizable material
   10.4 Clamping force
   10.5 Capture cylinder for the hub
   10.6 Disk position in the operating condition
11 Characteristics of the substrate
   11.1 index of refraction
   11.2 Thickness
12 Characteristics of the recording layer
   12.1 Test conditions
   12.2 Baseline reflectance
   12.3 Magneto-optical recording in the user zone
13 Disk format
   13.1 Track geometry
   13.2 Formatted Zone
   13.3 Control tracks
   13.4 Control Track PEP Zone
   13.5 Control Track SFP Zone
   13.6 Requirement for interchange of a user-recorded cartridge
14 Track format
   14.1 Track layout
   14.2 Sector format
   14.3 Recording code
   14.4 Defect management
Annexes
Annex A (normative) Optical system for measuring write, read,
        and erase characteristics
Annex B (normative) Definition of write and erase pulse width
Annex C (normative) Measurement of figure of merit
Annex D (informative) Values to be implemented in future standards
Annex E (informative) Guidelines for the use of ODCs
Annex F (normative) CRC for ID fields
Annex G (normative) Interleave, CRC, ECC, Resync for Data field
Annex H (informative) Sector retirement guidelines
Annex I (informative) Office environment
Annex J (informative) Transportation environment
Annex K (normative) Requirements for interchange

Describes the characteristics of 130 mm optical disk cartridges (ODC) of the Write Once Multiple (WORM) type, which provides for the disk to be initialized once, and the information to be written once only and read many times using the magneto-optical effect.