2.2 Optical Disk Cartridge Specifications
The following explains the components of the optical disk drive shown in Figure 2.1:
1)Cartridge case
Covers the disk to protect it from damage when handled and facilitates disk replacement. The cartridge case is labeled and has a write protect tab.
2)Shutter
Protects the disk against dust. When the cartridge is inserted into the optical disk drive, the shutter (metallic door) is opened.
3)Write protect tab
The write protect tab selects whether write is enabled or disabled.
4)Disk
Holds information which can be read by an optical beam.
5)Hub
The hub is placed at the center of the disk and is linked to the spindle of the drive. The hub is used for radial centering and axial positioning.
2.2.3Disk specifications
(1)128 MB disk
The ISO/IEC10090 defines 128 MB disk specification.
(2) 230 MB disk
The ISO/IEC13963 defines 230 MB disk specification.
(3) 540 MB/640 MB disk
The ISO/IEC15041 defines 540 MB/640 MB disk specification.
(4) 1.3 GB disk
The Cherry Book defines 1.3 GB disk specification.
(5) 2.3 GB disk
The Cherry Book 2 defines 2.3 GB disk specification.
Table 2.6 lists disk specifications.
