| 摘要 |
PURPOSE:To prevent breakdown of a data due to careless accessing, to quickly incorporate it into a system whose repair is completed, and to continue input and output operations of the other system, by holding an exclusive control information continuously. CONSTITUTION:This system is provided with plural controllers #1, #2, adaptors #1, #2 and input/output devices, exclusive control memories #1, #2 are connected between the respective adaptors #1, #2, and control information is held by the respective control memories #1, #2. A common signal line controlling circuit is provided on these adaptors #1, #2, respectively, and each signal line controlling circuit is connected by a common signal line. In this state, when one control system is faulty, an inhibiting signal of comparison of memory data is sent to the adaptor #1 or #2 of the other system through the common signal line, and comparison of memory data is stopped. After the fault has been repaired, a copying start signal of the memory #1 or #2, a memory data request signal and a comparison inhibition release signal are sent, and the regular operation is recovered. |
