Provided is a method, system, and program for caching updates to one target storage device in a first and second memories, wherein the target storage device is one of a plurality of storage devices. The analysis system may identify relationships between code elements and use tracer data to quantify and classify various code elements. The rectifier is connected to the source of incoming AC power and produces a DC voltage. The air intake duct defines an opening in the housing for providing air from outside the housing into the housing, and the air intake duct is axially aligned with the driven shaft and the fan disposed thereon, such that the air flows directly into the fan and is directed to the driven pulley.