Systems and methods for out of order memory management. The method includes measuring respective magnetic and mechanical performance for the plurality of heads and varying the density of an environment within the hard disk drive. The compensation segment is formed by a housing configured such that a lateral deflection of the supply line\u2014in relation to the longitudinal direction\u2014is made possible in the housing across an axial section. A plastic material is extruded around the plurality of light circuits and the substrate to completely encapsulates the bus elements and the plurality of light circuits to provide a protective housing. The bipolar plate assembly further includes a staggered seal arrangement to direct gaseous reactant flow through the fuel cell such that the seal thickness maximized while the repeat distance between adjacent fuel cells is minimized.