Abstract: An embedded disk controller comprises a main processor in communication with a first bus. A second processor is in communication with a second bus. An external bus controller (EBC) is in communication with the first bus and in communication with external devices via an external bus interface. A history module is located in the embedded disk controller, communicates with the first bus and the second bus, and at least one of monitors transaction information of one of said external devices and masks information of one of said external devices via the EBC based on setup information, wherein the EBC and the history module are located on at least on of an integrated circuit (IC) and a system on a chip (SOC) with the embedded disk controller.