| 摘要 |
PROBLEM TO BE SOLVED: To record discriminative information peculiar to each optical disk by showing the discriminative information with the recording positions of prescribed amounts of data recorded on respective recording areas of plural sectors having a header area and the recording area. SOLUTION: The data recording surface of the optical disk 1 is made a sector structure divided to radial areas, and further, plural zones Z0-Zn dividing the data recording surface to concentric circles are provided. Each sector is constituted of a data writing recording area AR2 succeedingly to a header area AR1 written with an address in the front. The header areas AR1 are arranged scatteredly on the disk 1, and address information in sector unit are recorded on them, and the header area AR1 is made a length equivalent to a fixed period of a groove GR. The recorded data on the recording area AR2 are rewritten frequently, and are provided with a fixed data amount to be recorded collectively. The optical disk 1 is provided with the peculiar discriminative information, and the discriminative information is specified by the recording position of the recorded data in the recording area AR2 of each sector. |
