In order to provide a control device for a storage and reproduction mechanism that can acquire a constant error rate without being affected by changes of atmospheric pressure, a control device comprises a storage medium for storing data, a head for conducting a storage/reproduction process of data on the storage medium, an error detection unit for detecting an error of the data read by the head, and a flying height control unit for controlling a flying height of the head in accordance with the error rate for correlating changes of the flying height due to the changes in the atmospheric pressure.