Joint decoding of ISI channel and modulation codes. An information control unit references a disc management table in a data management memory to verify whether or not a disc ID acquired from a current disc information management unit has already been recorded. As a function of the available loading volume, a possible loading configuration is calculated using at least some of the available anchor points, at least some of the retaining means, and the characteristics of the loads. An imagable material is formed on the second material, and patterned.