Abstract: A magnet movable under the influence of magnetic edge forces is arranged between stationary magnets.The magnet is surrounded by a release coil in such a manner that the coil part contributing to the force active in the release direction is located in the space formed by the stationary magnets.

Abstract: An access arm for use in a flexible magnetic disk pack for a magnetic disk storage apparatus having a wedge-shaped hollow body with a lower horizontal confining surface supporting a magnetic head and an upper confining surface arranged at an angle thereto. When the access arm is inserted into the disk pack, the two confining surfaces form a flow channel for the air moved by the rotation of the disks. On the leading and on the trailing side of the access arm the upper confining surface has protruding parts, so that additional stabilizing air bearing forces are generated on the magnetic disk adjacent the lower confining surface.