A method of and drive for recording medium defect management, and a defect managed recording medium. A thickness of the convex part increases from an edge to a center thereof. At the downhill end of the ride, the lever actuating the brake is caught and lifted by a capture ring, thus relieving the braking load on the trolley. The anchor can also support a secondary screw concentrically penetrating the void at the center of the anchor, in order to hang loads from a wall, with or without millwork. Display with the original number of bit planes returns when the movement condition is over.