Patent ID: 7613086

Claim:
A disk device for recording and reproducing information data on an optical disk, said disk device comprising: a rotating unit for rotating the optical disk at prescribed rotating speed; an optical pick-up for reading the information data recorded on the optical disk; a moving unit for moving the optical pick-up in the radial direction of the optical disk; a focus control unit for leading the focus of the optical pick-up to control the focus of the optical pick-up; a tracking control unit for leading the tracking of the optical pick-up to control the tracking of the optical pick-up; and an adjusting unit for repeatedly changing the setting value of an equalizer to adjust the equalizer so as to properly read the information data recorded on the innermost periphery of the optical disk when whether or not the information data is properly read is detected and when the information data is no properly read, wherein: when the optical disk is loaded on the disk device, the optical pick-up is moved to the innermost periphery of the optical disk, the optical disk is rotated at the prescribed rotating speed, the focus of the optical pick-up and the tracking of the optical pick-up are led, and the operation of the optical pick-up is raised; and when an out-of-focus state of the optical pick-up is detected, the focus of the optical pick-up is re-led, and when an out-of-tracking state of the optical pick-up is detected, the tracking of the optical pick-up is re-led and the setting value of the equalizer is changed to adjust the equalizer at a position where the operation of the optical pick-up is raised.