The optical disk player of the present invention is capable of controlling rotational speed of an optical disk, on the basis of a shape of the optical disk, so as to stably and efficiently write data in and read data from the optical disk. The optical disk player comprises: a motor for rotating the optical disk; and an optical pickup for irradiating a laser beam to the optical disk and receiving a reflected beam reflected therefrom. A CPU analyzes signals included in the reflected beam so as to recognize a shape of the optical disk. A servo processor controls rotational speed of the optical disk on the basis of the shape of the optical disk recognized by the CPU.


< Recording and reproducing apparatus for recording and reproducing information to and from a magneto-optical storage medium

< Method for reproducing information data from a magneto-optical storage medium in reverse direction with recording

> Automatic control method for generating stable laser power of an optical disk drive

> Information reading and recording apparatus

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