The foreign matter adhered to the data bearing surface of a master medium is removed by use of a dry, non-contact removal process, so as to facilitate the performance of a high transfer quality magnetic transfer. A memory hierarchy level has a coherence directory and associated directory data with a plurality of cachelines each associated with different data. The milling assembly is guided along the mill guiding device and contacts an upper external shoulder of a casing coupling of a casing in the first, cased well bore. Reducing or eliminating coarse hydraulic cement particles that cannot fully hydrate but include unreacted cores reduces or eliminates wasted cement normally found in concrete. The decoy module is registered with the content access provider device as a virtual replication peripheral.