Patent attributes
A connecting circuitry is disclosed. The connecting circuitry is coupled to a storage device, a first motherboard and a second motherboard, and controlled by a first control signal and a second control signal to switch over to a first mode, to a second mode and to a third mode. The connecting circuitry includes a first exchanging unit; a second exchanging unit; and a first multiplexing unit, electrical connected to the first exchanging unit and the second exchanging unit; wherein the first mode is the storage device being only accessed by the first motherboard, the second mode is the storage device being only accessed by the second motherboard, and the third mode is the storage device being accessed by both the first motherboard and the second motherboard.
