Patent ID: 7823027

Claim:
A data processing apparatus operably coupled to a system board equipped with one or more central processing units (CPU) and an input/output (IO) unit for connecting to a peripheral device, the data processing apparatus comprising: a plurality of crossbars to connect between the processing units, the plurality of crossbars being operable in a plurality of modes; and a mode change unit to change a mode setup of a first crossbar influenced by an error occurring in a second crossbar of the plurality of crossbars from a first mode to a second mode, the first mode being a dualization mode and the second mode being a mode in which the first crossbar and the second crossbar operate independently; wherein when an error occurs in the second crossbar, the second crossbar transmits a signal for notifying the error occurrence to the mode change unit and the mode change unit instructs the first crossbar to change from the first mode to the second mode.