| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk-shaped information recording medium designed to assure a large recording capacity by increasing a recording density. SOLUTION: The tracks TR having servo parts SAVO and data parts DATA of an optical disk of a sample servo system with which recording and reproducing of information are executed by the clock of a single frequency in the fixed state of an angular speed by using pregrooves and tracking control are spirally formed. The servo parts SAVO have address parts ADR where the management information for recording and reproducing of data is recorded and wobble mark parts WBM where tracking information, etc., are given. Both of the groove parts and land parts are used as the recording and reproducing tracks TR. Odd numbered tracks TRodd are formed in the land parts and even numbered tracks TReven , are formed in the groove parts. |
