The present invention is directed to an apparatus for securing an electronic component in a chassis. In recording data related to a content by dividing and recording the data in a plurality of sectors continuously, dummy data to be used for extracting a clock in PLL for data reproduction is recorded on a region adjacent before a sector from which data recording is started. One embodiment includes a first layer, a second layer adjacent to the first layer, and a third layer adjacent to the second layer opposite the first layer. In the retracted inactive position the rudder blade foot is spaced from said front face by the positively locking connection and the rudder blade foot is thus axially limitedly movable with the rudder blade axis member in relation to the mounting element so that the rudder blade is freely displaceable from the retracted inactive position into the deployed active position.