Glossary
Axial acceleration
Acceleration in the recording layer along the line perpendicular to the disk reference surface at a specified rotation speed. Axial acceleration is detected by optical means.
Axial displacement
A displacement at a point in the recording layer in a direction perpendicular to the disk reference surface from its standard position. The standard position in the recording layer is detected optically using the thickness and refraction rate of the protective layer, based on the disk reference surface.
Case
A cover of an optical disk. The case protects the disk from being damaged during handling and also allows the operator to replace disks easily. The case also provides for a label, write protection tab, automatic handling support, and media identification hole.
CDB (Command Descriptor Block)
A series of data describing
Clamp area
A disk ring area on which the clamp mechanism applies a clamp force.
Command
An
Control track
A track used to store media parameters and format information required to record and read data to or from an optical disk.
Defect management
In real time processing mode, defect management refers to an automatic program used to change the power, focus, tracking of reading and recording if an error is detected and used to decide whether numerous error sectors should be discarded. In batch mode, defect management refers to a guideline used to
