Presented are a system and method for sharing data objects among applications. The invention uses a hierarchical partitioning approach in conjunction with a subspace sampling methodology which is sensitive to a subject data set. The wire has an electrode land which is stacked on the surface electrode to be connected to the surface electrode, and the covering member has a first covering layer in which a first opening to expose the electrode land therein is formed and a second covering layer having a second opening communicating with the first opening and covering the first covering layer. Further, the apparatus is capable of storing data in replacement areas instead of defect areas, which have been determined to be defective according to rules of the defect management.