Optical disc and recording and reproducing apparatus and method

An optical disc recording and reproducing apparatus comprising:

• a rotation mechanism configured to rotate an optical disc in a rotating direction;
• and
• an optical system configured to generate a laser beam and focuses the laser beam to form a beam spot on the optical disc, wherein the optical system includes a scanner configured to deflect the laser beam along a radial direction of the optical disc in such a manner that the beam spot follows a first scan trajectory along a first direction crossing the rotating direction and a second scan trajectory along a second direction different from the first direction, and wherein the optical disk comprises a first data track with a sequence of recording pits along the first scan trajectory.