| 摘要 |
An information processing apparatus having a plurality of CPUs has increased reliability. When one of storage devices suffers a fault, a corresponding control device indicates the fault to other control devices, so that all the control devices can recognize the fault. When either one of the CPUs has accessed the storage device, the control device indicates the occurrence of the fault to the CPU. Upon reception of the indication of the occurrence of the fault, the CPU changes the storage device for an active system, if necessary, according to predetermined rules. The same processing is performed when other CPUs have accessed the storage device. As a result, when all the CPUs have accessed the storage device, the setting up of the active system is completed.
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