In a method and a device for reading and a method and a device for recording files on a sequential medium as well as the sequential medium itself, in order to enable the use of sequential write-once mediums, the file system descriptor pointing to a current version of a management information area, is recorded on a reserved track being located at the beginning of the volume. One embodiment for a weight assembly, for example, comprises a mass element having a first end, a second end and a sidewall extending between the first end and the send end. At least one line electrically connects the semiconductor chip to the base layer of the lead lock. A driving device is connected to the base and has a link which is connected to the pivotable frame by an eccentric member so as to pivot the pivotable frame and the top pad unit.