JPH04219831A - Diagnostic system for device shared by computers - Google Patents

Abstract

PURPOSE:To speed up exclusive control over plural diagnostic processors with the small hardware quantity of a diagnostic control part. CONSTITUTION:The shared device 3 in trouble informs the diagnostic processors 2-1, 2-2, and 2-3 of the trouble. The diagnostic processors 2-1, 2-2, and 2-3 detect their troubles. A diagnostic processor in trouble reports the trouble to other diagnostic processors to inhibit a diagnostic request signal. When the shared device 3 is in trouble and the diagnostic processor in diagnostic processing is in trouble, other diagnostic processors send diagnostic request signals to diagnose the shared device 3 with the diagnosis permission signal from the diagnostic control part 5 and inform a system controller 4 of the diagnostic results. The diagnostic control part 5 sends the diagnosis permission signal to one of the diagnostic processors 2-1, 2-2, and 2-3 according to specific priority.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for diagnosing a shared device between computers, and more particularly to a method for diagnosing a shared device between computers for the occurrence of a failure in a shared device shared among a plurality of computers.

0002

2. Description of the Related Art Next, a conventional diagnostic method for a shared device between computers will be described with reference to the drawings.

FIG. 4 is a block diagram showing an example of a connection between a computer and a diagnostic processing device in a conventional diagnostic method for a shared device between computers.

[0004] In the conventional diagnostic method for a shared device between computers, as shown in FIG. It connects to each of the diagnostic interface units 46, 47, and 48 through a diagnostic interface h to perform diagnostic processing.

[0005] In the diagnostic processing of the computer 41, when the diagnostic processing device 42 receives a fault notification from each part of the computer 41, it extracts the internal information of the part that received the fault notification using a scan path or the like. The internal information to be extracted includes the contents of various status registers, various status information, various memory data, and various work registers.

[0006] The extracted internal information is used to determine the cause of a failure in the device, the scale of the failure, the location of the failure, and whether or not it can be re-installed, and whether or not the computer can be restarted.

The diagnostic processing device 42 performs scan control for each device, read/write control of the internal status of the device, and various instruction controls for the device through the respective diagnostic interface sections 46, 47, and 48.

[0008]

[Problems to be Solved by the Invention] A plurality of computers, a plurality of diagnostic processing devices that manage respective diagnostic processing, a shared device that can be shared among the computers, and a system management device that manages the plurality of computers. In the above-mentioned conventional diagnosis method for shared equipment between computers in a system having For shared devices, there are cases in which diagnostic processing is carried out by specifying the diagnostic processing device for one computer, and cases in which the diagnostic processing is performed by selecting one of the diagnostic processing devices of all computers.

In the former case, the diagnostic processing for the shared device is performed by a specific computer diagnostic processing device, so when that diagnostic processing device becomes inoperable, the diagnostic processing for the shared device is performed. The problem is that it cannot be executed.

In the latter case, since the shared device is not under the control of the diagnostic processing device for one computer, it is necessary to prevent multiple diagnostic processing devices from competing with each other. It is necessary to select a diagnostic interface to occupy the diagnostic interface.

However, in this case, the shared device cannot operate due to a failure, and exclusive control of the diagnostic interface cannot be performed from the shared device. Therefore, exclusive control is required between multiple diagnostic processing devices, and multiple Exclusive control by communication between diagnostic processing devices or exclusive control by a system management device is required, and there is a problem that communication processing and software processing take time due to complicated control between computers.

[0012] An object of the present invention is to provide a plurality of computers;
A system that has multiple diagnostic processing devices that manage each diagnostic process, a shared device that can be shared between computers, and a system management device that manages multiple computers. A diagnostic interface is provided between them, and a diagnostic request from each diagnostic processing device that receives a failure notification from the shared device is selected by a priority circuit of a diagnostic control unit that can operate independently of the shared device, and the selected diagnosis By giving priority to processing units to execute processing and notifying the system management unit of the diagnostic processing unit that executed the process, exclusive control between multiple diagnostic processing units can be achieved without regard to the internal state of the shared device. An object of the present invention is to provide a diagnostic method for an inter-computer shared device that can be realized at high speed with a small amount of hardware.

[0013]

[Means for Solving the Problems] A diagnostic method for a computer-to-computer shared device according to a first aspect of the present invention is a diagnostic method that is shared between a plurality of computers, a plurality of diagnostic processing devices that manage diagnostic processing of each of the computers, and the computer. In a diagnostic method for a shared device between computers of a system having a shared device capable of managing a plurality of said computers, and a system management device that manages a plurality of said computers, said diagnostic processing device has a diagnostic interface for said plurality of said diagnostic processing devices. By having a diagnostic control unit that performs diagnostic control on the shared device according to instructions and can operate independently of the shared device, (A) when a failure occurs in the shared device, the plurality of diagnostic processing devices (B) a failure detection means of the diagnostic processing device that detects the occurrence of a failure within the diagnostic processing device; a fault control means of the diagnostic processing device that reports the occurrence of the fault to the other diagnostic processing devices within the diagnostic processing device that detected the occurrence of the fault, and suppresses a diagnostic request signal to the diagnostic control unit; D) When a failure occurrence notification is received from the failure reporting means, and when a failure occurs in the diagnostic processing device that is executing diagnostic processing for the shared device, the other diagnostic processing unit that has received the failure report A processing device sends a diagnostic request signal to the diagnostic control unit, executes diagnostic processing for the shared device only when a diagnostic permission signal is obtained from the diagnostic control unit, and notifies the system management device of the execution. (E) receiving diagnostic request signals from a plurality of diagnostic processing devices, selecting one of the diagnostic processing devices based on a predetermined priority order, and transmitting a diagnosis permission signal; A diagnostic path selection means for the diagnostic control unit that sends out the diagnostic path is configured.

[0014] Further, the diagnosis method of the inter-computer shared device of the second invention includes a plurality of computers, a plurality of diagnostic processing devices that manage diagnostic processing of each of the computers, and a shared system that can be shared among the computers. and a system management device that manages a plurality of said computers, wherein said shared device has a diagnostic interface for said plurality of said diagnostic processing devices and said shared device according to instructions from said diagnostic processing device. In addition to performing diagnostic control on the equipment,
By having a diagnostic control unit that can operate independently of the shared device, (A) when a failure occurs in the shared device, the shared device notifies the plurality of diagnostic processing devices of the occurrence of the failure; (B) the diagnostic processing device detects the occurrence of its own failure;
(C) The diagnostic processing device that has detected the occurrence of its own failure reports the occurrence of the failure to the other diagnostic processing devices, and suppresses the diagnosis request signal to the diagnostic control unit, (D ) When the diagnostic processing device receives a notification of the occurrence of a failure from the shared device, and furthermore, when a failure occurs in the diagnostic processing device that is executing diagnostic processing for the shared device, the diagnostic processing device receives the report of this failure, and The diagnostic processing device sends a diagnostic request signal to the diagnostic control unit, and executes diagnostic processing for the shared device only when it receives a diagnostic permission signal from the diagnostic control unit, and also executes the diagnostic processing for the shared device. (E) the diagnosis control unit receives diagnosis request signals from the plurality of diagnostic processing devices, selects one of the diagnostic processing devices based on a predetermined priority order, and permits diagnosis; It consists of transmitting a signal.

[0015]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a diagnostic system for an inter-computer shared device according to the present invention.

The computer system of this embodiment is shown in FIG.
As shown in , three computers 1-1, 1-2, 1
-3, and three diagnostic processing devices 2-1 that manage the diagnostic processing of the three computers 1-1, 1-2, and 1-3,
2-2, 2-3 and computers 1-1, 1-2, 1-
a system management device 4 that manages the three computers 1-1, 1-2, 1-3, and three diagnostic processing devices 2-1, 2-.
2 and 2-3, the diagnostic control means 10 performs diagnostic control on the shared device 3 according to instructions from the diagnostic processing devices 2-1, 2-2, and 2-3, and also performs diagnostic control on the shared device 3. It has a diagnostic control section 5 that can operate independently.

When a failure occurs in the shared device 3, the failure reporting means 11 of the shared device 3 sends a failure report line b to the three diagnostic processing devices 2-1, 2-2, and 2-3. This notifies you of the occurrence of a failure.

On the other hand, FIG. 2 is a block diagram showing an example of the relationship between the diagnostic processing device, the diagnostic control section, and the shared device in this embodiment.

As shown in FIG. 2, the diagnostic processing device 2-1,
2-2, 2-3 failure detection means 12-1, 12-2, 1
2-3 detects the occurrence of a failure in each of the diagnostic processing devices 2-1, 2-2, and 2-3.

[0021] Also, diagnostic processing devices 2-1, 2-2, 2-
The fault control means 13-1, 13-2, 13-3 of No. 3 control the diagnostic processing devices 2-1, 2-2 that have detected the occurrence of a fault in themselves.
, 2-3, other diagnostic processing devices 2-1, 2-2, 2-
3 through the fault report line e (including e-1, e-2, and e-3), and when the fault occurs, a diagnosis request signal line is sent to the diagnostic control unit 5. c.
The above diagnostic request signal is suppressed.

Therefore, the diagnostic processing devices 2-1, 2-2, 2
-3 diagnostic processing means 14-1, 14-2, 14-3,
When a failure occurrence notification is received from the failure reporting means 11 via the failure reporting line b, and furthermore, when a failure occurs in the diagnostic processing device that is executing diagnostic processing for the shared device 3,
Other diagnostic processing devices 2-1, 2- that have received a report of this failure via the failure report line e (including e-1, e-2, e-3)
2, 2-3 sends a diagnosis request signal to the diagnosis control unit 5 via the diagnosis request signal line c, and only when a diagnosis permission signal is obtained from the diagnosis control unit 5 via the diagnosis permission signal line d, the shared device 3 At the same time, a report of the execution is notified to the system management device 4 through execution report lines f-1, f-2, and f-3.

Then, the diagnostic path selection means 15 of the diagnostic control section 5 receives the diagnostic request signals via the diagnostic request signal lines c from the three diagnostic processing devices 2-1, 2-2, and 2-3, and
Based on a predetermined priority order, the diagnostic processing devices 2-1, 2-2,
2-3 is selected and a diagnosis permission signal is sent via the diagnosis permission signal line d.

FIG. 3 is a logic circuit diagram showing an example of the diagnostic path selection means of the diagnostic control section in this embodiment.

As shown in FIG. 3, the diagnostic path selection means 15 of the diagnostic control section 5 includes
As the set output of 8, the diagnostic processing device 2-1,
Diagnosis permission signals 2-2 and 2-3 are generated.

When there is a diagnostic request signal from the diagnostic processing device 2-1 and there is no set output from FF107 and FF108, there is an output from NOR110, so AND103
The FF 106 is set by the output.

Furthermore, when there is no diagnostic request signal from the diagnostic processing device 2-1, there is an output to NOT101, so there is a diagnostic request signal from the diagnostic processing device 2-2, and FF106, F.F.
When there is no set output from F108, there is an output from NOR111, so FF107 is set by the output from AND104.

Furthermore, when there is no diagnostic request signal from the diagnostic processing device 2-1, 2-2, there is an output to NOT102, so there is a diagnostic request signal from the diagnostic processing device 2-3, and the FF
If there is no set output of 106 and FF107, NOR
Since there is an output at 109, F is determined by the output of AND105.
F108 is set.

Therefore, the diagnostic processing means 14-1, 1 in FIG.
4-2, 14-3 are FF106, FF107, FF1
Only the one that receives the diagnosis permission signal, which is the set output of 08, operates.

Furthermore, when a failure occurs in the diagnostic processing means that receives this diagnostic permission signal, the diagnostic processing means 14-1
, 14-2, 14-3 in front of gates G11, G12, G
21, G22, G31, and G32, by calculating the logical product of this diagnosis permission signal and the failure occurrence report from the corresponding diagnosis processing means, the other diagnosis processing means 14-1, 14-
2, 14-3 sends a diagnosis request signal to the diagnosis control section 5.

[0031]

[Effects of the Invention] As explained above, the diagnosis method for the computer-to-computer shared device of the present invention can be applied to a plurality of computers,
A system that has multiple diagnostic processing devices that manage each diagnostic process, a shared device that can be shared between computers, and a system management device that manages multiple computers. A diagnostic interface is provided between the shared devices, and a diagnostic request from each diagnostic processing device that receives a failure notification from the shared device is selected by a priority circuit of a diagnostic control unit that can operate independently of the shared device, and the selected diagnosis is processed. By giving priority to processing units to execute processing and notifying the system management unit of the diagnostic processing unit that executed the process, exclusive control between multiple diagnostic processing units can be achieved without regard to the internal state of the shared device. This has the advantage that it can be implemented at high speed with a small amount of hardware.

The diagnostic method for a shared device between computers of the present invention does not limit the diagnostic processing for the shared device to a specific diagnostic processing device, and even if one diagnostic processing device fails, other normal diagnostic processing devices can be used. If there is, it has the effect that diagnostic processing of the shared device can be performed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a diagnostic method for an inter-computer shared device according to the present invention.

FIG. 2 is a block diagram showing an example of the relationship between a diagnostic processing device, a diagnostic control unit, and a shared device in this embodiment.

FIG. 3 is a logic circuit diagram showing an example of diagnostic path selection means of the diagnostic control unit in this embodiment.

FIG. 4 is a block diagram illustrating an example of a connection between a computer and a diagnostic processing device in a conventional diagnostic method for a shared device between computers.

[Explanation of symbols]

1-1, 1-2, 1-3, 41 Computer 2
-1, 2-2, 2-3, 42 Diagnostic processing device 3
Shared device 4 System management device 5 Diagnosis control unit 11 Failure reporting means 12-1, 12-2, 12-3 Failure detection means 1
3-1, 13-2, 13-3 Failure control means 14
-1, 14-2, 14-3 Diagnostic processing means 15
Diagnostic path selection means 43 Central processing unit 44 Input/output processing unit 45 Memory devices 46, 47, 48 Diagnostic interface units a, h
Diagnostic interface b, e, e-1, e-2, e-3 Fault report line c
Diagnosis request signal line d Diagnosis permission signal line f-1, f-2, f-3 Execution report line G11, G
12, G21, G22, G31, G32 gate

Claims (2)

[Claims] 1. A plurality of computers, a plurality of diagnostic processing devices that manage diagnostic processing for each of the computers, a shared device that can be shared among the computers, and a system management device that manages the plurality of computers. A system for diagnosing an inter-computer shared device of a system having a diagnostic interface for a plurality of the diagnostic processing devices and performing diagnostic control on the shared device based on instructions from the diagnostic processing device;
By having a diagnostic control unit that can operate independently of the shared device, (A) when a failure occurs in the shared device, the shared device notifies a plurality of the diagnostic processing devices of the occurrence of the failure; (B) A fault detection means of the diagnostic processing device that detects the occurrence of its own fault within the diagnostic processing device; (C) A fault detection means of the diagnostic processing device that detects the occurrence of its own fault within the diagnostic processing device; (D) a failure control means of the diagnostic processing device that reports the occurrence of the failure to the diagnostic processing device and suppresses a diagnosis request signal to the diagnostic control unit; (D) notifying the failure occurrence from the failure reporting means; If a failure occurs in the diagnostic processing device that is executing diagnostic processing for the shared device, the other diagnostic processing device that has received the report of the failure issues a diagnostic request to the diagnostic control unit. a diagnostic processing unit of the diagnostic processing device that sends a signal and executes a diagnostic process for the shared device only when a diagnosis permission signal is obtained from the diagnostic control unit, and notifies the system management device of the execution; ) Diagnostic path selection means of the diagnostic control unit that receives diagnostic request signals from a plurality of diagnostic processing devices, selects one of the diagnostic processing devices based on a predetermined priority order, and sends a diagnostic permission signal; A diagnostic method for a shared device between computers, characterized by comprising: 2. A plurality of computers, a plurality of diagnostic processing devices that manage diagnostic processing for each of the computers, a shared device that can be shared among the computers, and a system management device that manages the plurality of computers. A system for diagnosing an inter-computer shared device of a system having a diagnostic interface for a plurality of the diagnostic processing devices and performing diagnostic control on the shared device based on instructions from the diagnostic processing device;
By having a diagnostic control unit that can operate independently of the shared device, (A) when a failure occurs in the shared device, the shared device notifies the plurality of diagnostic processing devices of the occurrence of the failure; (B) the diagnostic processing device detects the occurrence of its own failure;
(C) The diagnostic processing device that has detected the occurrence of its own failure reports the occurrence of the failure to the other diagnostic processing devices, and suppresses the diagnosis request signal to the diagnostic control unit, (D ) When the diagnostic processing device receives a notification of the occurrence of a failure from the shared device, and furthermore, when a failure occurs in the diagnostic processing device that is executing diagnostic processing for the shared device, the diagnostic processing device receives the report of this failure, and The diagnostic processing device sends a diagnostic request signal to the diagnostic control unit, and executes diagnostic processing for the shared device only when it receives a diagnostic permission signal from the diagnostic control unit, and also executes the diagnostic processing for the shared device. (E) the diagnosis control unit receives diagnosis request signals from the plurality of diagnostic processing devices, selects one of the diagnostic processing devices based on a predetermined priority order, and permits diagnosis; A diagnostic method for a shared device between computers, characterized by transmitting a signal.