An apparatus and method shares predictive failure information between computer systems in a computer network. Due to the modular design, the light transmission unit can be repaired independently of the image transmission unit. Furthermore, structural strength of the combined rack can be enhanced by the serial fixation of the serial joint material and the bond of the intensified rack board. 08<\uf603R\u2062\u20621R\u2062\u20622\uf604<0. The filtering apparatus includes: a filter holder protruding from one side of the FPC bracket toward the readwrite head; and a filter disposed in the filter holder which filters foreign materials in air flowing in the disk drive.