Information processing apparatus.

摘要

An information processing apparatus includes an optical disk (l0) and a drive mechanism (l2) for rotat­ing the disk. The disk has a disk-shaped body (l6) and an attractable portion (22) at the central portion of the body. The attractable portion has an attractable member (24) projecting from the body. A center hole (26a), defining the center of rotation of the body, is bored in the attractable member. The drive mechanism includes a turntable (54) which is rotated by a motor (50). A depression (58) is formed in a support surface (54a) of the turntable. A magnetic attraction unit (60) is arranged in the depression so as to magnetically at­tract the attractable portion, whereby the attractable member is housed in the depression and the surface of the body is in contact with the support surface.