An allocation apparatus of the present invention provides the mechanism that another logical volume of temporary number is automatically made in the storage system shared with plural servers, when it is recognized that the targeted logical volume is doubly allocated. According to the method, convergence of said filtering process is determined, and the image within the region is classified as an image with identifiable pattern if the filtering process is convergent, whereas the image within the region is classified as an image with unidentifiable pattern if the filtering process is nonconvergent. A low loss photodefinable dielectric planarizing layer is formed over one surface of the ceramic substrate. The four connectors have complementary engagement means at opposite ends thereof for interengagement with the engagement means at the four corners of the frame to hold the connectors on the frame. The controller determines a limited time period on the basis of the total number of the terminals, and sends a second request signal indicative of the limited time period to the terminals.