JPH07191786A - System for countermeasure against power source fault in electronic computer - Google Patents

Abstract

PURPOSE:To preserve processing contents at the time of disconnecting a power source, to enable continuously executing the processing after the power source is restored and also to facilitate the restoration processing at the time of disconnecting the power source. CONSTITUTION:A condensed equipment 20 maintaining the operation of an electronic computer system for fixed time after a power source disconnection preliminary-announce signal 100 from a power source disconnection preliminary- announce means 10 is generated and a copying means 50 preserves the contents of a main storage device 40 in a nonvolatile memory 60 when the power source disconnection preliminary-announce signal is originated from the power source disconnection preliminary-announce means 10. The contents of the nonvolatile memory are inspected at the time of starting a system after the restoration of a power source fault and the system starting processing is continued when information is not preserved. When information is stored, the information is restored to the main storage device 40. Thus, conditions at the time of power source disconnection is reproduced concerning the state of the main storage device 40 and the processing can be continued.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power failure countermeasure such as a power failure in an electronic computer system.

[0002]

2. Description of the Related Art Conventionally, this kind of computer power failure countermeasure system uses an MG device, a power storage facility, an in-house power generation facility, etc. It was ensuring continuous operation by automatically switching to private power generation equipment.

[0003]

In the above-mentioned conventional power failure countermeasure system for an electronic computer, the MG device includes a mechanical operation part, and as a private power generation facility, a machine such as a solar cell is used from the viewpoint of current capacity and the like. A device that does not include a physical operation cannot be generally adopted, and a device that includes mechanical power such as a gasoline engine has been used. Therefore, a conventional computer power failure countermeasure system using an MG device and an in-house power generation facility generally needs to consider a failure countermeasure of the facility itself with a mechanical operation, thereby improving system reliability. There was a problem of making it worse.

Further, in a conventional computer power failure countermeasure system using a storage device such as a storage battery, in the case of a system configuration including a private power generation facility, power is supplied to the entire system for a time sufficient for switching to the private power generation facility. Capacity is required, and in the case of a system configuration that does not include in-house power generation equipment, power is supplied to the entire system for a long time, so a larger capacity is required. It was

Further, since the above-mentioned equipment is used, the conventional power failure countermeasure system for an electronic computer has a problem that the entire system becomes expensive due to the equipment cost and the like.

[0006]

According to a power failure countermeasure system for a computer of the present invention, a non-volatile memory having the same capacity as the main memory capacity of the main memory device and an operation of copying the contents of the main memory device to the non-volatile memory. And a copy means for copying the contents of the non-volatile memory to the main storage device, and a power storage facility for supplying power to the entire system for a predetermined time necessary and sufficient to guarantee the operation time of the copy means. It is characterized by having.

A power failure countermeasure system for an electronic computer according to the present invention mainly includes an input / output control device for controlling a peripheral device, an operating state of the input / output control device and an operating state of the peripheral device controlled by the input / output control device. The input / output control device state saving means for recording in the storage device, and the state of the input / output control device and the state of the peripheral device controlled by the input / output control device based on the state information saved by the input / output control device state saving means. It is characterized in that it has an input / output control device state setting means for making the state equivalent to the state when the state information was saved.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a power failure countermeasure system for an electronic computer according to the first invention, and FIG. 2 is a configuration diagram of an embodiment of a power failure countermeasure system for an electronic computer according to the second invention. Is.

Referring to FIG. 1, in the power failure countermeasure system for a computer according to the first aspect of the present invention, when an event such as a power failure that should interrupt the operation of the computer system occurs, the power off notice means 10 causes the central processing unit 1 to move. On the other hand, a signal 100 is transmitted to request termination of the processing and stop of the system, and at the same time, power supply from the power storage equipment 20 to the central processing unit 1 is started. Upon receiving the signal 100, the operating system 30 saves the state immediately before receiving the signal 100, and starts the interruption process associated with power-off. The above-mentioned "storing the state immediately before receiving the signal 100" is a generally realized process for realizing a multi-process operation in a general-purpose computer, and a description thereof will be omitted here. The above-mentioned interruption processing associated with the power-off is realized as follows. The operating system 30 requests the copy means 50 to save the information of the main memory processing device 40 in the non-volatile memory 60 by the signal 200,
Wait for the signal 210 to be generated from the copy means 50. Upon receiving the signal 200, the copy means 50 sends the signal 3
10 receives the information in the main memory 40 and sends a signal 330
The information of the main storage device 40 is stored in the nonvolatile memory 60 by the signal 330. The latest state of the operating system 30 is stored in the information of the main storage device 40. The operation in which the latest state of the operating system 30 is stored in the main storage device 40 is an operation realized by a multi-process operation in a general purpose computer, and the description thereof is omitted here. Copy the contents of the main memory 40 by the copy means 50 to the non-volatile memory 60 /
When the saving process is completed, the copy means 50 is stopped and the operation of the central processing unit 1 is stopped. After that, when a certain time elapses after the signal 100 is transmitted from the power-off notice means 10, the power-off processing of the central processing unit 1 is started, and the operation of the system is completely stopped. Events that should interrupt the operation of the computer system such as power outages are resolved,
When the supply of power is started, the power-on process of the central processing unit 1 is performed, and the initialization process of the electronic computer system is started. Following the initialization processing, the operation of the operating system 30 is started. The operating system 30 sends a signal 200 to instruct the copy means 50 to copy the non-volatile memory 60 to the main storage device 40.
The waiting process for the signal 210 is started. The signal 20
Upon receiving 0, the copy means 50 checks the contents of the non-volatile memory 60 to determine whether the information in the main storage device 40 is stored. When the information is not stored in the non-volatile memory 60, the copy means 50 immediately outputs the signal 210.
To the operating system 30. Signal 21
The operating system 30 that has received 0 is normal O
S Startup processing is continued. When the information is stored in the non-volatile memory 60, the copy means 50 reads the information in the non-volatile memory by the signal 340 and outputs the signal 320.
The information is stored in the main storage device 40 by. As a result, the operating system 30 returns to the state at the time of power-off processing. The copy means 50 sets the non-volatile memory 60 to a state in which no information is stored. Then, the copy means 50 emits a signal 210. At this time, signal 210
The operating system 30 that has received the message is the state when the power is turned off. However, since the input / output device and the input / output control device are in the initialized state, the operating system 30 performs the input / output processing like the magnetic disk device. I / O processing is re-executed for devices that can be re-executed, and device disconnection / re-installation processing is executed for devices that are difficult to re-execute, such as communication lines.

Next, a power failure countermeasure system for a computer according to the second aspect of the present invention will be described with reference to the drawings.

Referring to FIG. 2, in the power failure countermeasure system for a computer according to the second aspect of the present invention, an input / output controller state saving / setting means 70 is added to the power failure countermeasure system for a computer according to the first aspect of the invention. The output control device 80 can be recovered. Here, the operating system 90 is the operating system 30 of the first invention.
The description of the same parts as those of the first invention will be omitted.

First, when the operating system 90 receives the signal 100, the power-off processing is started. Then, the operating system 90 issues a signal 400 to the input / output controller state saving / setting means 70 before issuing a request for saving the information in the main memory 40 to the non-volatile memory 60 by the signal 200. Upon receiving the signal 400, the input / output control unit state saving / setting means 70 takes in the state information of the input / output control unit 80 by the signal 600 and the signal 610, and takes the state information by the signal 510 in a predetermined area of the main storage unit 40. To store. Then signal 4
10 notifies the operating system 90 of the end of processing. The operating system 90 receiving the signal 410 issues the signal 200 to the copy means 50. After the power is turned on again, when the operating system 90 receives the signal 210 indicating the completion of the information copying process from the non-volatile memory 60 to the main storage device 40 by the copy means 50, the signal 400 saves the input / output control device state /
The setting unit 70 is instructed to perform the recovery process of the input / output control device 80. The input / output control unit state saving / setting means 70, which has received the recovery processing instruction of the input / output control unit 80 by the signal 400, reads the state information of the input / output control unit 80 from the defined area of the main storage device 40 by the signal 500. , Signal 600 and signal 610 reset the state of the input / output control device 80. Then, the signal 410 notifies the operating system 90 of the completion of the processing. With the above processing, the state of the electronic computer system becomes the same as when the power-off processing was started, and the processing can be continued.

[0014]

As described above, the power failure countermeasure system for a computer according to the present invention is intended to improve the reliability of the system by excluding facilities such as an MG device and an in-house power generation facility accompanied by mechanical operation. There is an effect that can be.

The power failure countermeasure system for a computer according to the present invention eliminates the above-mentioned mechanical equipment, can minimize the capacity of the storage equipment such as a storage battery, and can use low-priced storage equipment. The effect is that the whole can be constructed at a low price.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a power failure countermeasure system for an electronic computer according to the first invention.

FIG. 2 is a configuration diagram of an embodiment of a power failure countermeasure system for an electronic computer according to the second invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 central processing unit 10 power-off notice device 20 power storage equipment 30, 90 operating system 40 main storage device 50 copy means 60 non-volatile memory 70 input / output control device state saving / setting means 80 input / output control device

Claims (2)

[Claims] 1. A non-volatile memory having the same capacity as the main memory of the main memory, a copying operation of the contents of the main memory to the non-volatile memory, and a content of the non-volatile memory to the main memory. A power supply for a computer, comprising: a copy means for performing a copying operation; and a power storage facility for supplying electric power to the entire system for a predetermined time necessary and sufficient to guarantee the operation time of the copy means. Failure countermeasure system. 2. An input / output control device for controlling peripheral devices,
An input / output control device state storage means for recording in the main memory the operating state of the input / output control device and the operating state of a peripheral device controlled by the input / output control device; and the input / output control device state storage means. Input / output control device state setting for making the state of the input / output control device and the state of the peripheral device controlled by the input / output control device equivalent to the state at the time of saving the state information based on the stored state information The power failure countermeasure system for an electronic computer according to claim 1, further comprising: