Information processing apparatus and control method

A control method executed by an information processing apparatus that includes an interface switching circuit and a first processor, the interface switching circuit including a first hardware interface coupled to a first device part, the first processor including a second hardware interface, the control method comprising:

• blocking, when hot-removal of the first device part is detected, a signal path between the first hardware interface and the second hardware interface by the interface switching circuit;
• cancelling, when diagnosis for a second device part newly hot-inserted in the first hardware interface is completed, the blocking of the signal path in response to a result of the diagnosis;
• detecting presence of the second device part by the first processor from that the first processor transits from a non-responsive state to a responsible state;
• and
• executing an initialization process for the second device part.