KR100201940B1 - Error detect method of auxiliary memory appratus in full electronic switching system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION Claimed in the Claim: An error detection method of an auxiliary memory device in an electronic switching system.

2. The technical problem to be solved by the invention: The operation state is abnormal even if the auxiliary storage devices of the electronic switching system is powered, or an error occurs when reading or writing data from the auxiliary storage devices. The exact cause of the error was not known. In addition, the operator must perform various checks, such as the inspection of the board controlling the auxiliary storage device and the cable connection to the auxiliary storage device, in order to find the cause of the error. There is a problem that causes a big failure in the system resulting in the system (DOWN).

3. Summary of the Invention Solution: An auxiliary memory device for recording and reading out initial programs, billing data, and statistical data, and recording and backing up the recorded data, an adapter for controlling the operation of the auxiliary memory device, and recorded data. In the all-electronic switchboard having a maintenance processor for managing, the state checking process of checking the state of the auxiliary storage device at regular intervals to detect whether there is abnormal operation, and the instruction to detect whether abnormal operation is performed when the instruction is executed according to the command execution request. A method of detecting a hardware error of an auxiliary memory device through a cause check process of checking a cause of an error when an abnormal operation is detected in an execution process and a state check process and a command execution process.

4. Significant use of the invention: electronic switching system

Description

Error Detection Method of Auxiliary Memory in Electronic Electronic Switching System

1 is a block diagram illustrating a general input / output device.

2 is a control flow chart for checking the state of the auxiliary memory device according to the present invention.

3 is a control flow diagram for performing a command according to the present invention.

4 is a control flowchart of a subroutine for checking hardware error according to the present invention.

* Explanation of symbols for main parts of the drawings

110: maintenance processor 112: adapter

114: auxiliary memory device 116: dual port memory

118: CPU 120,122: SCSI processor 1,2

124,126: SCSI bus 128-134: DKU

136-140: MTU

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic switching system, and more particularly, to a method of detecting a hardware error when performing an instruction or checking a state in an auxiliary memory device.

In general, the input / output device in the electronic switching system is composed of an auxiliary memory device and an input / output port. In addition, the auxiliary storage device is a hard disk drive (Hard Disk Unit, DKU) for storing the programs and data necessary for operating the system, two DKU for storing the billing data generated by the call, and It consists of three magnetic tape units (MTUs) that can back up billing data stored in the DKU.

The general input / output device for inputting / outputting data according to a user's request in the electronic switching system has the configuration as shown in FIG. Looking at the configuration of the input and output device shown in FIG. 1, the auxiliary memory device 114 is a DKU having a hard disk (Hard Disk) and a driver (Driver) for controlling the drive of the hard disk (Hard Disk) (128-134) and a magnetic tape (MTU) (136-140) having a driver (Driver) for controlling the drive of the magnetic tape (Magnetic Tape). In addition, the DKU 128-134 stores initial programs, billing data, and statistical data of the electronic switching system, and records or reads data under the control of the adapter (ADAPTOR) 112. The MTU 136-140 backs up and stores the tape stored in the DKU 128-134. The adapter 112 includes a dual port memory 116 capable of bidirectional transmission of data, two SCSI processors 120 and 122 for controlling the auxiliary memory 114, and a small computer. System Interface (hereinafter, referred to as SCSI) includes a CPU 118 that manages the state of the auxiliary storage device 114 at a period of 3-4 seconds through the buses 124 and 126. The adapter 112 also controls the auxiliary memory 114 at the time of performing an instruction provided from the maintenance processor 110 or checking the state of the auxiliary memory 114. The maintenance processor 110 manages data stored in the auxiliary memory 114, and performs control for writing or reading data to the auxiliary memory 114. The SCSI buses 124 and 126 consist of two buses. Two DKUs 128 and 130 and two MTUs 136 and 138 are connected to the SCSI bus 124, and two DKUs 132 and 134 and one MTU 140 are connected to the SCSI bus 126. It should be noted that the reference numerals according to the above configurations are used the same in the following.

Referring to the process of checking the operation state of the auxiliary memory device in the input / output device of the all-electronic exchanger having the above configuration, the CPU 118 provided in the adapter 112 has a SCSI processor every 3-4 seconds. The state of the auxiliary storage device 114 connected to the SCSI buses 124 and 126 via 120 and 122 is checked in order. At this time, whenever the state of the auxiliary memory device 114 being checked in the state checking process changes from normal to abnormal or changes from abnormal to normal, the changed contents are received and the backup operation is performed. The method of checking the state transmits a test unit ready (TUR) command commonly used in the SCSI matching method to the auxiliary storage device 114, and then analyzes the state value in response thereto to check whether or not it is normal. . The TUR command is a command provided to confirm an operation ready state of the auxiliary memory 114.

In addition, even when the auxiliary storage device 114 is in a normal state, a command may be inputted to read or write data from the maintenance processor 110, and thus the work may not be normally performed. In this case, the adapter 112 provides an error message for reading or writing to the maintenance processor 110. However, despite the power supply to the auxiliary memory 114, if the state is abnormal or if an error occurs when reading or writing data from the auxiliary memory 114, the exact cause of the error can be known. There was no. In addition, the operator should perform various checks such as the inspection of the board controlling the auxiliary storage device 114 and the cable check connecting the auxiliary storage device 114 to find the cause of the error. There was a problem that causes a big obstacle in the operation of the electronic switching system, resulting in a system down (DOWN).

Accordingly, an object of the present invention is to provide a method of checking and informing occurrence of a hardware error of a corresponding auxiliary memory device when a command to write or read data is input.

Another object of the present invention is to provide a method for detecting and informing a secondary memory device having a hardware error in a process of checking a state of a periodic secondary memory device.

In order to achieve the object according to the present invention, when the auxiliary memory device is abnormally operated when controlling the auxiliary memory device in accordance with the recording or reading command of the data to detect the presence of a hardware error by requesting the sense data to the auxiliary memory device; Process and, if the auxiliary memory device operates abnormally when checking the state of the periodic auxiliary memory device, detects and informs whether or not a hardware error occurs by requesting sense data from the auxiliary memory device.

Hereinafter, with reference to the drawings shown in detail.

It should be noted that the general configuration of the input / output device of the all-electronic exchange which carries out the present invention has the same configuration as in FIG. 1 and the same reference numerals are used.

2 is a control flow chart for checking the state of the auxiliary memory device according to the present invention, the process of selecting the auxiliary memory device to check the status every 3-4 seconds, and configured to send the TUR command block to the selected auxiliary memory device And analyzing the resultant state value received in response to the TUR command to determine whether it is operating non-statically according to the analyzed state value, and performing an error cause check mode if it is determined to be abnormally operated. Is done.

3 is a control flow chart for performing a command according to the present invention. The process of periodically checking an area where a command reception request of a CPB is registered to search for a command reception request, and when a registration of a command reception request is detected, Searching for data necessary for executing the command from the CPB; performing a data transmission operation to the auxiliary storage device to perform the command; and analyzing the status value when the resultant status value is received according to the command processing. And determining that there is an abnormal operation and performing an error cause check mode.

4 is a control flowchart of a subroutine for checking a hardware error performed when abnormal operation is detected in FIGS. 2 and 3 according to the present invention, and constitutes a sense request command block for reading and inspecting the state of the auxiliary memory device. And a process of analyzing the received sense data when the sense data is received in response to the sense request command, and transmitting a hardware error message when data indicating a hardware error is detected from the sense data.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 2, 3, and 4.

First, the process of checking the state of the auxiliary memory device in the adapter 112 will be described with reference to FIG. 2. In step 210, the CPU 118 connects the SCSI buses 124 and 126 to which the auxiliary memory device 114 to check the state is connected. And the unique number (ID) of the auxiliary storage device 114 to be checked. If necessary data is selected in step 210, the control proceeds to step 212 to configure a TUR command block which is a command for checking the operation readiness state of the auxiliary memory device 114. When the configuration of the configuration of the TUR command block is completed, the SCSI processors 120 and 122 transmit the configured TUR command block to the auxiliary storage device 114 of the corresponding number (ID) through the selected SCSI buses 124 and 126 in step 214. do. In operation 216, the SCSI processors 120 and 122 receive data corresponding to the result state value from the auxiliary memory device 114 in response to the TUR command. When the resultant state value is received in step 216, the CPU 118 analyzes the received state value in step 218. The CPU 118 proceeds to step 220 and determines whether the state value analyzed in step 218 is a state in which the corresponding auxiliary memory device 114 cannot operate normally. In general, the determination process performed in step 220 determines that the state value analyzed in step 218 is 0 when it is analyzed as a normal state, and when the state value is analyzed by 2, it is determined that it is an abnormal operation state. Therefore, if the data of 2 representing the abnormal state is found in step 220, the process proceeds to step 222. A state value of 2 indicates that the auxiliary memory 114 did not execute a command previously requested and was not executed by some factor, and checks the state value to the host. However, if 0 data indicating a normal state is detected, the process proceeds to step 224 to determine whether the state check of all the auxiliary storage devices 114 is completed. If not, the process returns to step 210 to perform the state check process. If it is determined that it is completed, the status check process is terminated. In step 222, the auxiliary memory 114 performs a mode for checking the cause of the inability to perform a normal operation. A detailed execution process of step 222 will be described in detail with reference to FIG. 4 below.

Next, referring to FIG. 3, the adapter 112 performs a command for writing or reading data to the auxiliary memory device. In operation 310, the CPU 118 records the CPB recorded in the dual port memory 116. In step 312, if the command receiving request is registered in the check process of step 310, the process proceeds to step 314, and returns to step 310 if it is not registered. Check process periodically. In general, the determination of whether or not to perform in step 312 is determined by searching whether a data, a5a5, which is a command reception request is registered in a specific area. In addition, the CPU 118 registers a command receiving request and proceeds to step 314. The CPU 118 analyzes a CPB registered in the dual port memory 116 and receives data necessary to perform a registered command. The registered command refers to a command for reading or recording data registered in the auxiliary memory device 114. When the analysis of the data necessary for the execution of the command is provided in step 314, the corresponding SCSI processor 120 or 122 of one of the SCSI processors 120 and 122 of the CPU 118 may be selected in step 316 through the SCSI buses 124 and 126. A data transmission operation is performed to the auxiliary memory 114 to perform a command. In operation 318, the SCSI processors 120 and 122 may receive a state value according to the execution result of the command transmitted in operation 316 from the corresponding auxiliary memory device 114. When the result status value is received, the CPU 118 analyzes the result status value received in step 320. When the analysis of the resultant state value is pigmented in step 320, the process proceeds to step 322 to determine whether the state value analyzed in step 320 is a state in which the corresponding auxiliary memory device 114 cannot normally execute a command. In general, the determination process performed in step 322 determines that the state value analyzed in step 320 is 0, and when the state value is analyzed as 2, it is determined that the state is abnormal. Therefore, if the data "2" indicating an abnormal state is found in step 322, the process proceeds to step 324. However, if data of 0 indicating a normal state is detected, the process proceeds to step 326 and the maintenance processor 110 is notified to the maintenance processor 110 through the dual port memory 116 and the execution process ends. In step 324, the auxiliary memory 114 performs an error cause check mode for checking the cause of the inability to perform a normal operation. A detailed process of step 324 will be described in detail with reference to FIG. 4 below.

The subroutine of the check mode, which is an error source performed when abnormal operation is detected in FIGS. 2 and 3, will be described in detail with reference to FIG.

If an abnormal operation is detected in steps 220 and 322 of FIG. 2, the CPU 118 proceeds to step 410 to request a sense request instruction block for sensing data for examining the hardware state of the auxiliary memory device 1401. Configure When the configuration of the sense request command block is completed, the SCSI processors 120 and 122 transmit the sense request command block to the corresponding auxiliary storage device 140 through the SCSI buses 124 and 126 in step 412. In operation 414, the SCSI processors 120 and 122 receive sense data having a size of 14 bytes from the auxiliary memory device 140 in response to the sense request command through the SCSI buses 124 and 126. If the 14-byte sense data is received, the CPU 118 proceeds to step 416 to analyze the received sense data. When the analysis of the received sense data is completed, the CPU 118 determines whether an abnormal operation of the auxiliary storage device 114 is caused by a hardware error in step 418. The determination step may be checked by checking whether the checked value is 4 by checking the 0, 1, 2, 3 bits of the 3rd byte in the 14-byte sense data received in step 414. If the data of 4 is detected in step 418, the CPU 118 proceeds to step 420 and provides a hardware error message to the maintenance processor 110 through the dual port memory 116 and then returns to terminate the function. do. The error message transmitted to the maintenance processor 110 includes a name, a number, and a code indicating a hardware error of the auxiliary storage device 114 in which a hardware error has occurred. However, if it is determined in step 418 that it is not a hardware error, the SCSI processor 120 or 122 proceeds to step 422 and stops the timer for each command and returns to terminate the function.

As described above, according to the present invention, the system itself is quickly diagnosed whether or not a hardware error occurs in the auxiliary memory device consisting of a hard disk drive and a magnetic tape drive, and a user can be notified quickly when a hardware error occurs. It can protect billing data, initial program and statistical data by eliminating possible factors, and can provide efficient service by preventing system from crashing.

Claims (2)

A plurality of auxiliary memory devices for recording and reading initial programs, billing data and statistical data, and backing up and recording recorded data, an adapter for controlling the operation of the auxiliary memory devices, and a maintenance processor for managing the recorded data. A method of detecting, by an adapter, a hardware error of an auxiliary memory device in an all-electronic switch, the method comprising: outputting an identification code and a command for designating the auxiliary memory device in order to sequentially check an operation state of the auxiliary memory devices at predetermined intervals; A second step of constructing and outputting a message to include an identification code designating the command and a corresponding auxiliary storage device in response to a read / write command provided from the maintenance processor; In response to the command or message output in step 2, the resultant status value can be received from the auxiliary And a third process of determining an operation state of the auxiliary storage device by analyzing the received state value, and a sensor data request command for detecting abnormal operation of the auxiliary storage device by the third process. And transmitting the sensed data from the auxiliary storage device in response to the sensor data request command, analyzing the received sense data to detect the abnormal operation due to a hardware error. A fifth step of determining whether the second operation is performed; and if it is determined that the cause of the abnormal operation detected in the fifth step is a hardware error, the maintenance processor includes an identification code of the auxiliary memory device having a hardware failure and information indicating a hardware failure. Notify users by configuring and sending hardware error messages The error detection method of the auxiliary memory device, characterized in that the sixth process. The method of claim 1, wherein in response to receiving the sensor data request from the auxiliary storage device in response to the sensor data request command, the fifth process analyzes a third byte of the 14 bytes constituting the sense data. And determining whether the detected abnormal operation is due to a hardware error.