Patent ID: 7911907
Filing Date: 2011-03-22
Classification: G11B

Abstract:
1. An optical disk apparatus for performing at least one of: reproducing data from an optical disk selected from among a plurality of types of optical disks including a recordable optical disk and a read-only optical disk which are produced according to the BD specifications; and recording data to the recordable optical disk, the optical disks each having a management area and a user area that is positioned outside the management area wherein the track pitch in the management area is broader than the track pitch in the user area, the optical disk apparatus comprising: means for irradiating the management area of an optical disk with a light beam while not performing tracking control, and generating a push-pull tracking error signal from light which is reflected by the management area; and disk determination means for determining, based on the push-pull tracking error signal obtained from the management area, whether the optical disk mounted in the optical disk apparatus is a recordable optical disk or a read-only optical disk.