| 摘要 |
A system monitoring device retains hardware state information of a computer system and OS software state information of a hardware control instruction given by OS software and monitors and controls the entire computer system. When state change of the hardware state information and OS software state information is recognized, it is stored in a non-volatile memory as save information. When re-activation accompanying active replacement of the system monitoring device, which has failed, is recognized, the save information is read from the non-volatile memory, and the corresponding hardware state information and OS software state information before device failure is restored. The operating hardware is recognized according to save information, and the hardware state information generated for the recognized hardware during active replacement is restored. The operating OS software is recognized according to the save information, and the OS software state information generated for the recognized OS software during active replacement is restored.
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