A disk drive comprises a turning mechanism (3 to 8) adapted to provide a pulse to the side of the disk (D) resting on a tray (2) in a position outside the center so as to provide an upward and rotating movement to the disk in order to turn it over. The turning mechanism may include a pulse member (3) acting directly on the disk. In an embodiment, the turning mechanism is pneumatic, the pulse member being a nozzle adapted to direct a pressurized gas pulse at the disk. Tests have shown that exerting an eccentric pulse on the disk results in flipping the disk over reliably and quickly.