Apparatus for scanning the record carrier and the record carrier

The record carrier having a servo track (4) indicating been the information track (9) intended for recording information blocks are described. Servo track (4) has a modulated parts for encoding and periodic variation of a physical parameter, the position information at regular intervals at a predetermined frequency. The modulated portion begins bit sync element is of a word sync type having one or word sync elements of the data type having a data bit element. The bit sync element, word sync element and the data bit element are modulated according to a same predetermined type of modulation of the periodic variation. The distance between all elements constituting the modulated parts are unique. Further, the read record carrier and / or writing device for are described.