Recording/reproducing information of an optical disk surface where no track information is present

摘要

An optical disk drive includes a pickup main body (65) that radiates a laser beam to a surface or a region of an optical disk (60), where no track information is present, thereby recording and/or reproducing predetermined information on the surface or the region, and that is movable in a radial direction of the optical disk (60), a position sensor (63) for detecting movement and/or a position of the pickup main body (65), and a control unit (81) that controls the position of the pickup main body (65) and/or an objective lens (72) on the basis of information relating to the movement and/or position of the pickup main body (65) that is detected by the position sensor (63).