| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk-shaped recording medium and a disk recording/ reproducing device capable of improving the performance of a data transfer speed and an access speed. SOLUTION: This disk-shaped recording medium has a spiral or concentric groove 3, the groove 3 is divided into plural zones 1, 2 in the radial direction, physical address information and sector boundary information 2a are recorded by wobbling the groove, the wobbling frequency of the physical address information obtained at the time of rotating the medium at a constant angular velocity is constant in the respective zones and is increased in a zone on the outer peripheral side and recording data are arranged on the groove corresponding to the sector boundary information 2a. |
