A method, system and article of manufacture to establish a virtual drive accessible to pre-boot and operating system runtime phases. The light emitting layer includes a well layer including a nitride semiconductor including In. A query engine responsive to a user request and the metrics database aggregates documents having same, unique attributes and calculates therefrom, or from meta data defining the aggregate, an age value of the aggregate. In some methods, the silicon-containing layer can contain an n-type doped region laterally adjacent a p-type doped region, and the processing can be utilized to form a transistor gate containing n-type doped silicon simultaneously with the formation of a transistor gate containing p-type doped silicon.