A metal-integral conductive rubber component of the present invention includes a laminate in which conductive rubber layers and insulating rubber layers are laminated alternately in parallel. The fuel cell system drives the reactant gas supply device based on a predetermined current instruction value to supply a reactant gas to the fuel cell, thereby generating the power. When performing a read operation, the file system first determines the appropriate compression group that contains the desired data and determines whether the compression group has been compressed.