A magnetic artificial superlattice is composed of laminated thin films including two or more kinds of magnetic flaky particles obtained by exfoliation of a layer titanium oxide in which Ti atoms in the lattice have been substituted with magnetic elements. Each sliding sealing element is affixed by double-faced adhesive tapes to an upper attachment portion of a plate spring above the upper edge of the sponge seal and to a lower attachment portion of the housing frame below the lower edge of the sponge seal, without being affixed to the sponge seal, per se. The performance state machine determines which storage resources are allowed to use the performance path and properly transitions the running of each storage resource to and from the performance path and normal path mode of operation. The principal portion occupies the major part of the column. The second connector defines at least one securing hole, which receives the at least one wedge positioned therein.