RECORDING MEDIUM, RECORDING REPRODUCTION DEVICE AND METHOD

摘要

A recording medium (11) in CLV format includes a guide layer (12) in which guide tracks (TR) have been formed preliminarily, and a plurality of recording layer (13). In the guide tracks, a plurality of mark groups (MG) are arranged, each of which includes a plurality of identical recording marks formed at identical rotation phase positions in a plurality of tracks that are adjacent to each other in the radial direction. The plurality of mark groups are arranged discretely along the track direction in such a manner that at most one center mark contained in each of the mark groups is arranged in each of groups each of which is composed of a predetermined number of slots that are arrayed sequentially in the track direction. The mark groups are arranged so as to be deviated from one another in at least one of the radial direction and the track direction so that the mark groups should not be adjacent to one another in the radial direction.