The present invention provides a search method used to search for the reading order of a plurality of recording groups when the plurality of recording groups written on tape are continuously read by a tape drive which manages data on tape in recording units having a fixed data length for each recording. The control device includes a housing, a direction pad capable of being contacted by the user in at least two different locations to provide two different directional signals to the host computer, and a computer-controlled actuator that outputs a force directly on the direction pad. The core spin tomography device has a basic field magnet which is surrounded by a magnet envelope which surrounds and defines an inner area, a gradient coil system being disposed inside the inner area. The light emitting structure comprises state of the art, energy efficient, light generating dies.