Systems, methods and interfaces are disclosed for managing communications associated with a mobile communication device. The storage control apparatus allocates the first logical volume to a second logical volume that is a virtual logical volume that has been divided into at least two virtual areas. A bottomed hole is formed from the first principal surface side in the substrate. The filter media may be supported by one or more layers of gravel. When the devices mentioned are embedded in the printed circuit board, one part of them can be exposed from the printed circuit board for normal functions.