| 摘要 |
PURPOSE:To always monitor the normal state of a processor by applying the interruptions in a fixed cycle to a computer set at the locked side to confirm the normal operation and deciding the occurrence of a fault in case no answer is received to release the lock information. CONSTITUTION:When a file locking action is carried out by a disk controller 2, a signal communication part 231 set within a processing circuit 23 delivers an answer request interruption signal to a processor set at the locked side after a prescribed timer set time T. While the processor outputs a prescribed command. The answer request interruptions are applied continuously in a fixed cycle T until the file locking action is through. Here the locked processor stops its operation by some reason after the file locking action is carried out and does not comply with the answer request of the controller 2. In such a case, the answer request signal is outputted again after the set time T. If no answer is received yet from the processor, it is decided that the processor has a trouble. Thus a lock releasing action is carried out through a file lock/unlock table 25.
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