A connection adapter between a rigid transcutaneous implant can be anchored intracorporeally in a femoral stump, and a part of an extracorporeal orthopaedic knee joint. After starting to wait, when acquiring partial data including a chromatic color, the converting section outputs multi-color converted data as the converted data expressing gray by a combination of densities of the multiple colors with respect to the partial data its output has been waited. Thereby, the reduction of the deterioration in performance at the time of remote copying, the reduction of a storage area to be assigned to a secondary site as a copy destination, the shortening of a time required for migratory copying and the assignment of any area of a logical volume on any RAID group are enabled. In addition, engagement patches in the vicinity of the fingernail location on the backs of two of the fingers can be engaged onto the thumb or to the front patch of an adjacent finger. The invention establishes a patch testing area determined by a calculated patch trigger point and user configurable sample window parameters.