The present invention provides an error correction method that is used in full response read channels. The housing provides a lineofsight through the apparatus to a front window. The camera then records multiple images of the pattern undergoing a sequence of subsequent displacements to a final position distinct from the initial position. Thus, the wear bar 66 creates a clearance allowing the drive wheel 30 to rotate without making abrading contact with the debris. The charge unit electrically connects to the cord set sub-assembly while the connectors of the charge unit and the cord set sub-assembly are connected to one another to thereby form a cord set. The first write data portion is programmed to the first data storage device and the second write data portion if magnetically written to the second data storage device at the same time.