Patent ID: 7548497
Filing Date: 2009-06-16
Classification: G11B

Abstract:
1. An optical disk having physical tracks for recording data being stored in a plurality of sectors; said optical disk having a user data area formed of said physical tracks; a test area provided outside of the user data area, and formed of said physical tracks used to write test data for laser power adjustment; and guard tracks provided in the inner periphery side and outer periphery side of the test area, wherein no recording being made in the guard tracks; wherein addresses in the order of the numbers using binary numbers are assigned to the respective ones of the plurality of sectors; said physical tracks have logical tracks as an unit of access, each of said logical tracks being composed of 2 the sector addresses of the 2 a predetermined number of bits from a beginning of an address of each sector represent the track address of the logical track to which said each sector belongs; a predetermined number of bits from an end of the address of each sector represent the sector address of said each sector within the logical track; address information for each logical track composed of 2 identification numbers indicating the order assigned to each of the plurality of locations in which the address information is stored, said identification numbers being stored together with said address information in said physical tracks.