A suspension damper includes a housing bounding a main chamber. The method further can include paying charges resulting from communications between the communication device of the first user and the designated user from the allocated portion of the available balance of the prepaid account. The magnetic field has a potential with two minima as reflective and non-reflective positions. The storages include third mapping tables indicating which physical extents of physical volumes included in the storages store the logical extents. The first and second electrode down-leads are insulated from the third and fourth electrode down-leads. The hard mask layer, and the active fin, are provided with widths that vary due to the dummy designs.