JPH04290147A - Fault detecting method for information processor - Google Patents

Abstract

PURPOSE:To enhance the credibility of an analytic result by suppressing an analytic process while the diagnostic result is ambiguous when the information processor such as an electronic exchange device detects the fault of an input/ output device. CONSTITUTION:This method consists of a diagnostic means 3 which inputs and outputs test data to input/output devices 1 connected, channel by channel, a discriminating means 4 which discriminates the diagnostic result of the diagnostic means 4, and an analyzing means 5 which is actuated by the discriminating means 4 according to the discriminated result of the discriminating means 4; and the analyzing means 5 is actuated only when all devices are to be diagnosed by the diagnostic device, whereby diagnosing the input/output device in fault.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique that is effective when applied to a failure detection technique in an information processing device such as a control device of an electronic switching system.

0002

2. Description of the Related Art An example of this type of information processing apparatus will be described with reference to FIG.

[0003] The figure shows an information processing device 2 used for controlling an electronic switching device, and has a duplex device configuration into an active system and a standby system.

[0004] Each system is equipped with a central control unit (CC) that performs main control, a main memory (MM), and a channel control unit (CHC), and each of these is intertwined with other systems. , each can be switched and used as an active system or a standby system.

[0005]The channel control device (CHC)
The file memory (F
M), an input/output device 1 such as a magnetic tape device (MT) is connected.

[0006] By the way, while the active system devices are processing, in the standby system, the central control unit (CC) executes device diagnosis for each bus (BUS) of the channel control device (CHC). If a fault is detected as a result of this diagnosis, the fault is analyzed.

This type of diagnostic method will be explained using FIG. 6. The configuration of the test contents is distinguished by phase number for each test content. For example, for device A of input/output device 1, the test defined by the phase number 01 is executed, and for device B, the test defined by the phase number 01 is executed. , the test defined by phase number 00 was being executed.

[0008] Therefore, diagnosis processing can be performed on the target device in units of phase numbers, and
It was also possible to test only some of the equipment according to the specifications.

That is, in normal failure detection processing, it takes a lot of time to diagnose all input/output devices at all times, so it is better to specify each device individually and perform diagnostic processing. was efficient.

0010

However, as shown in FIG. 6, for example, when the phase number N is
Even if instructions are given to perform a diagnosis, within the same channel control device (CHC), the diagnosis is performed in order starting from the first device (device A) connected to it, and ultimately the diagnosis target This led to the N device.

Therefore, when an error is determined as a result of the diagnostic processing, whether the cause of the failure lies in the previously specified N device itself or if there is another problem in the test route leading to the N device. It was unclear whether the device had one.

[0012] Nevertheless, if the fault analysis process is executed in this state, the input/output device 1 where the fault has occurred will be
Failure conditions would be analyzed without identifying the problem, which could result in a loss of credibility in failure detection.

[0013] The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a technique that can increase the credibility of analysis results by preventing analysis processing from being performed in a state where the diagnosis results are ambiguous. It is about providing.

[0014]

[Means for Solving the Problems] The present invention provides a diagnostic means 3 for inputting and outputting test data to an input/output device 1 connected to each channel, and a diagnostic result obtained by the diagnostic means 3. and an analysis means 5 that is activated by the determination means 4 based on the determination result of the determination means 4. Activate the analysis means 5 only if
Diagnosis of the input/output device 1 that is causing a failure is now executed.

[0015]

[Operation] The principle of the present invention will be explained using FIG.

The information processing device 2 includes a main control section (CC),
Channel control device (CHC) and this channel control device (
It is composed of a plurality of input/output devices 1 connected to the CHC via a bus (BUS).

The diagnosis means 3, determination means 4, and analysis means 5 are held in the main control section (CC).

After the diagnostic means 3 diagnoses each input/output device 1, the determining means 4 determines whether or not the devices to be diagnosed are all devices in the channel control device.

[0019] Then, if all the devices are to be diagnosed as a result of the above judgment, the analysis means 5 is activated to analyze the failure state of the devices in which the failure has already been identified.

On the other hand, if only some of the devices are to be diagnosed, the process is forcibly terminated without starting the analysis means 5 because the device in which the failure has occurred is not specified and is in an ambiguous state. .

[0021] This prevents activation of the analysis means 5 in an uncertain state, making it possible to perform highly reliable failure analysis.

[0022]

Embodiment FIG. 2 shows the configuration of an information processing apparatus which is an embodiment of the present invention. In the figure, a central control section (CC) performs main control of the entire device, and a main memory (MM) stores processing programs, data, etc. of the central control section (CC).

Further, a channel control device (CHC) for controlling each input/output device 1 is connected to the central control section (CC), and is connected to a bus (BUS) from the channel control device (CHC). It controls the transmission and reception of data to and from a plurality of input/output devices 1.

In this embodiment, a display device (VDT) is connected to the bus (BUS) as one of the input/output devices 1, and the diagnostic status and analysis results of the input/output device 1 can be monitored. .

In this embodiment, the diagnosis means 3, determination means 4, and analysis means 5 of the input/output device 1 each have a main memory (MM) that stores diagnostic data, a determination program, and an analysis program, and centrally control them. Although this is realized by execution by a channel control unit (CC), it may be realized by connecting a diagnostic device, a determination device, and an analysis device as hardware to a channel control device (CHC).

FIG. 3 shows the configuration of diagnostic data in the diagnostic means 3. The diagnostic data is divided into phase numbers 00, 01, . . . N for each test content, and each phase number is further comprised of a plurality of test data TEST00, 01, 02.

[0027] The test contents are different for each phase number,
The devices to be diagnosed are often different. For example, in the figure, diagnostic data with phase number 00 is performed on device A, and diagnostic data with phase number 01 is performed on device B. However, in general, when diagnosing the input/output device 1, a common test is often repeated on different devices, and a single input/output device 1 may be diagnosed by duplicating data of a plurality of phase numbers.

Next, the failure detection procedure in this embodiment will be explained using FIG. First, when diagnostic data is read into the main memory (MM), diagnostic processing for each input/output device 1 is executed according to instructions from the central control unit (CC) (step 401). Next, when the diagnostic process is completed, the determination means 4 implemented by the central control unit (CC) determines the diagnosis result (402). Here, if no error is detected, this means that there is no abnormality in the input/output device 1, and the process is then terminated.

On the other hand, if an error is detected in step 402, whether the diagnostic processing in step 401 specifies all the input/output devices 1 in the same channel control device (CHC) or only some of them. Determine whether it was performed by specifying only input/output device 1 (
403).

[0030] When the diagnostic processing in step 402 is executed with only some of the input/output devices 1 as the diagnostic target, the error has occurred in an input/output device other than the specified input/output device 1. Because there is a possibility
The next analysis process will not start. At this time, the failure detection process may be forcibly stopped and the process interrupted; however, in this embodiment, all input/output devices 1 are designated as diagnostic targets again (
404), the diagnostic processing of step 401 is re-executed.

On the other hand, in step 403, if the diagnosis target specifies all the input devices, the failure analysis means 5 is activated to analyze the failure state (step 405).
). At this time, in the previous diagnosis process (401), all the input/output devices 1 were specified as the targets for diagnosis, and the input/output device 1 in which the error occurred was identified by the pointer instruction in the central control unit (CC). Therefore, analysis processing is performed targeting this device.

[0032]The analysis result is displayed on the display terminal (VDT) together with the judgment of the previous diagnosis result and is conveyed to the operator.

As described above, according to the present embodiment, when an error is detected by the judgment of the diagnostic process, if only some of the input/output devices 1 are to be diagnosed, the input/output device 1 in which the error occurred cannot be identified, so analysis processing is not started. Then, all input/output devices 1 are designated again and the diagnostic processing is re-executed.

Therefore, it is possible to prevent the analysis process from being started in an ambiguous state where the input/output device 1 in which the error has occurred cannot be identified, and it is possible to prevent the credibility of the subsequent failure analysis from decreasing.

[0035]

According to the present invention, when starting the analysis process following the diagnostic process, by determining whether the targets of the diagnostic process are all devices connected to the channel control device (CHC), It is possible to prevent the device from performing analysis processing in an uncertain state, and it is possible to improve the reliability of failure detection.

[Brief explanation of the drawing]

[Figure 1] Principle diagram of the present invention

[Fig. 2] Block diagram showing the device configuration of the embodiment

[Figure 3] Explanatory diagram showing the contents of diagnostic data

[Figure 4] Flow diagram showing failure detection processing procedure

[Fig. 5] Block diagram showing the general configuration of an information processing device

[Fig. 6] Block diagram showing the diagnostic path in the conventional technology

[Explanation of symbols]

1...I/O device, 2. Information processing device, 3...Diagnostic means, 4. Judgment means, 5. Analysis means, BUS・・Bus CC...Central control unit CHC...Channel control device MM...Main memory VDT...display terminal

Claims (2)

[Claims] 1. An information processing device (2) in which a main control unit (CC) controls a plurality of input/output devices (1) connected to a channel control bus (BUS) through a channel control device (CHC). A diagnostic means (3) that executes input/output of test data to and from an input/output device (1) connected to each channel of a control device (CHC), and a diagnostic result by this diagnostic means (3) is determined. It consists of a determination means (4) and an analysis means (5) that is activated based on the determination result of the determination means (4), and the processing by the determination means (4) is performed on the device to be diagnosed by the diagnosis means (3). are all the devices in the corresponding channel, and if all the devices are designated as the devices to be diagnosed and a fault is detected, activating the analysis means (5); If only some devices are specified as diagnostic target devices and a fault is detected, the analysis means (5
) forcibly stopping processing without starting the process. 2. The process by the determination means (4) is such that, in the step, if only some input/output devices (1) are specified and a failure is detected, all the devices are specified again. After restarting the diagnosis means (3) and identifying the faulty input/output device (1), restart the analysis means (5).
). Claim 1 characterized in that it includes the step of activating the
A failure detection method for the information processing device described above.