Patent ID: 6028828
Filing Date: 2000-02-22
Classification: G11B

Abstract:
A disk recording and reproducing device for recording and reproducing data, comprising:a disk type recording medium having spiral or concentric grooves being divided radially into a plurality of zones to be traced by a light beam, wherein physical address information and sector boundary information are previously recorded by groove wobbling according to a zone constant angular velocity system, said recording medium including wobbling frequencies of said physical address information which are obtainable at a constant angular velocity of disk rotation and which are constant in each zone, the respective wobbling frequencies of said zones increasing toward a disk periphery;a rotation controller for rotating said disk type recording medium at a constant rotation frequency;reference clock generating means for generating a reference clock corresponding to a wobbling frequency obtained from said physical address information;a recording controller for recording data in at least one of a groove and a land portion or in at least one of a plurality of grooves or a plurality of land portions of said disk type recording medium on the basis of said reference clock; anda reproduction controller for reproducing data recorded in said at least one of a groove and a land portion or in said at least one of a plurality of grooves or a plurality of land portions of the disk type recording medium on the basis of said reference clock.