A computer implemented method, apparatus, and computer usable code for managing cache data. The sheet member defines a first plane and the bracket nut defines a second plane, which is at an offset angle to the first plane. The information processing apparatus extracts an original data and a write destination address included in the selected backup data and writes the original data, for each original data and the write address extracted from the backup data, to a storage area, of the main memory unit, indicated by the write destination address. Further, the core openings facilitate pouring of the grout down through the aligned core openings.