Patent ID: 7007192

Claim:
An information processing system comprising an information processor and a service processor, the information processor and the service processor being interconnected with each other, wherein: the information processor includes: one or more unit parts having at least one CPU that stores information in a register; and a storage that stores an OS by which the information processor operates; the service processor includes: a detection means for detecting whether or not a replacement unit part that can replace the unit part is connected to the information processor; and a control means for controlling the information processor after the detection means has detected the connection to stop a process being executed by the CPU according to the OS, controlling the information processor to copy information stored in the unit part into the replacement unit part, changing information on the unit part and the replacement unit part so that the replacement unit part can operate according to the OS as a substitute for the unit part, and controlling the information processor to restart the process according to the OS by using the replacement unit part; and wherein the service processor and the information processor operate independently.