JPH0227442A - Fault detecting system - Google Patents

Abstract

PURPOSE:To surely detect the fault of a standby system by making an inquiry from a main system side to a standby system and reporting from the standby system to the main system. CONSTITUTION:A stopping signal is sent from a main system 1 to a standby system 2, and by the normality confirmation during the run in a standby system 1, a standby system writes the run state of a normality confirming program to the main memory of both systems of the main system 1 and the standby system 2. When writing is completed, the standby system sends a signal to the main system 1, restarts the run of the self-diagnostic program, and the main system 1, when the signal is received, reds the run state of the standby system 2 written earlier from the main memory and judges whether or not the normality is obtained. At the time of the normality, the normality completing processing is executed and at the time of the abnormality, the abnormality completing processing is executed. Thus, the fault of the standby system can be surely detected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a failure detection method, and particularly to a failure detection method for a standby standby device on the main device side of an information processing device.

[Conventional technology]

The conventional failure detection method is to run a normality check program in a standby backup device and report it to the main device when an abnormality is discovered.

[Problem to be solved by the invention]

With the conventional failure detection method described above, even if an abnormality occurs in the standby spare device, it may not be reported to the main unit, or the normality confirmation program running in the standby spare device may run out of control. However, it has the disadvantage that it misses them and cannot fully detect them.

It is an object of the present invention to compensate for the above-mentioned drawbacks and to be able to detect a failure even when there is a failure in a standby spare device but no report has been made.

[Means to solve the problem]

The failure detection method of the present invention is a failure detection method for an information processing device consisting of a main device and a standby spare device, in which the main device starts online operation and at the same time confirms the normality of its own system on the standby spare device. means for activating the normality confirmation function of the standby standby unit, and for making an inquiry from the main device to the forward standby standby unit as to whether the normality check function is operating normally; The configuration includes means for reporting to the main device whether or not the normality confirmation function is operating normally.

〔Example〕

FIG. 1 is a diagram showing the configuration of an apparatus according to an embodiment of the present invention.

The main device 1 inquires of the standby spare device 2 whether the normality confirmation function is operating normally.

The standby spare device 2 reports to the main device 1.

FIG. 2 is a flow chart showing the flow of processing in one embodiment of the present invention. In step 11, a stop signal is sent from the main device 1 to the standby backup device 2, and in step 21, the normality check program running in the standby backup device 1 is stopped. When the program is stopped, the standby spare device writes the running state of the normality check program in the main storage device of the main device 1 and the standby spare device 2 in step 22. When the writing is completed, the standby spare device 2 sends a signal to the main device 1 in step 23 and resumes running the self-diagnosis program in step 24. When the main device 1 receives the signal, in step 12 it reads out the previously written running state of the standby spare device 2 from the main memory, and in step 13 it determines whether it is normal. If normal, normal termination processing is performed in step 14, and if abnormal, abnormal termination processing is performed in step 15.

〔Effect of the invention〕

As explained above, the present invention allows the main device to make an inquiry to the standby backup device and have the standby backup device report to the main device, thereby ensuring that even if there is a failure but no report is received, the standby backup device can be used more reliably than the conventional method. This has the effect of detecting equipment failure.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the flow of processing.

Claims (1)

[Claims] In a failure detection method for an information processing device consisting of a main device and a standby backup device, when the main device enters online operation, a normality check function is started on the standby backup device to check the normality of its own system. , comprising means for making an inquiry from the main device to the forward waiting aircraft backup device as to whether the normality confirmation function is operating normally; A failure detection method characterized by having means for reporting whether or not a confirmation function is operating normally.