Abstract: An information storage disk handling apparatus includes a first disk device, a second disk device and a turn-over device. The first disk device has a first tray, and the second disk device has a second tray. The first disk device is mounted over the second disk device. Each of the trays has an ejected position. The turn-over device is mounted between the ejected positions of the trays of the first disk device and the second disk device to turn over an optical disk removed from the first tray at its ejected position and received by the second tray at its ejected position after the optical disk is turned.

Abstract: A disk drive is provided for restraining deterioration of the verticality of the optical axis of an optical pickup in relation to the surface of the disk when the side of the disk to be scanned for the recording and/or reproducing action is alternated from one side to the other side, in recording and/or reproducing data signals on both sides of the disk. The disk drive (1) includes a turn table (11) on which a disk D is rotatably supported, a pickup (12) for recording and/or reproducing data signals on both sides of the disk D rotated by the turn table (11), and a disk tray (31) for transferring the disk D between a recording and reproducing position which confronts the turn table (11) and a loading and unloading position at the outside of the disk drive (1). A turning movement mechanism is provided for turning the turn table (11) and the pickup (12) at once from a first position which confronts the one side of the disk D to a second position which confronts the other side of the disk D or vice versa.