RECOVERING METHOD FOR HIGH-RELIABILITY COMPUTER SYSTEM

摘要

PURPOSE:To eliminate various trouble due to the recombination of processors by disconnecting some of the processors in the case of trouble occurrence and switching all the processor into another new processor group at the time of recovery. CONSTITUTION:Three MPUs(microprocessing unit) of a BPU(basic processing unit) 2A are normally in operation. If trouble occurs to the MPUC during the execution of a process B, it is disconnected and the operation is carried on by the MPUA and MPUB. The printed board of a new BPU2B is inserted into a free slot in response to abnormality information by the MPUA, and then the respective MPUs in the new BPU2B diagnose themselves; and the process is transferred from the old BPU2A to the new BPU2B and a process D is carried out according to the result of majority decision making by the three MPUs. Thus, the process is taken over by carrying on the operation of the BPLT up to a good switching point of time or a repair maintenance period, so that the takeover is done at the most suitable point of time of software.