KR100216365B1 - Disk error detection and recovery method in electronic exchange - Google Patents

Abstract

1. The technical field to which the invention described in the claims belongs: Hard disk error detection and recovery method in all electronic switch.

2. The technical problem to be solved by the invention: the maintenance processor controls the SCSI adapter in accordance with the data provided from the outside, accordingly, the SCSI adapter drives the HDD to record or read the input data to the maintenance processor Provided in. However, if a specific area of the HDD is damaged while the exchange is in operation, a read error or a recording error occurs when the user reads the data of the damaged area or writes the data in the damaged area. I couldn't. In addition, if the Super Blok area of the HDD is damaged, a system operation program or billing data cannot be used, which may cause a big obstacle in system operation.

3. Summary of Solution of the Invention: If a particular sector of the operating disk is damaged and data cannot be recorded, the location of the damaged sector is identified and the same address is assigned to the spare medium of the disk to partially recover the data of the damaged area. Dump and resave with the same address that was initially recorded.

4. Significant Uses of the Invention: Electron Exchanger

Description

Disk error detection and recovery method in electronic switchboard

1 is a block diagram showing a general electronic switch.

2 is a diagram illustrating a control flow for detecting and recovering a disk error according to an embodiment of the present invention.

The present invention relates to a disk error detection and recovery method in an electronic switchboard, and more particularly, to a method for detecting and recovering a sector in which an error has occurred in a disk.

The general configuration of the system for managing data in the electronic switchboard has the configuration as shown in FIG.

Looking at the configuration of the data management system shown in Figure 1, the HDD 114 is generally composed of a high capacity hard disk (Hard Disk) and a driver (Driver) for controlling the drive of the hard disk, The initial program, billing data and statistical data of the data is stored or read out according to the control of the SCSI adapter (SCSI ADAPTOR) 112.

The SCSI adapter 112 is controlled by the maintenance processor 110 to control the HDD 114.

The maintenance processor 110 manages data stored in the disk 114 and performs control for writing or reading data to the disk 114.

Referring to the conventional operation of managing data in the electronic switch having the above configuration, the maintenance processor 110 controls the SCSI adapter 112 in accordance with the data provided from the outside, accordingly the SCSI adapter Reference numeral 112 indicates that the HDD 114 is driven to record or read data inputted to the maintenance processor 110.

However, when the exchange reads or records data in the damaged area from the HDD 114 or records data in the damaged area while the exchange is in operation, a read error or a recording error occurs, thereby failing to perform a desired operation. In addition, if the Super Blok area of the HDD 114 is damaged, a system operation program or billing data cannot be used, which may cause a big obstacle in system operation.

As described above, the prior art focuses on more efficiently reading or writing data stored in the HDD 114, and thus, there is a limit in analyzing the reason for the HDD error in the system in operation or recovering the error. There was a problem.

Accordingly, an object of the present invention for solving the above problems is to provide a method for detecting whether a corresponding region is in an error state when a write or read command of specific data is input.

Another object of the present invention is to provide a method of stopping the use of an error occurrence area and moving data to a normal area by analyzing the generated error history.

In order to achieve the object according to the present invention, when a particular sector of a disk in operation is damaged and data recording is not performed, the location of the damaged sector is identified and the same address is assigned to a spare medium of the disk to partially recover data of the damaged area. It is characterized in that the dump (dump) to write to the same location that was initially recorded.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2.

The general configuration of the system for managing data in the all-electronic switchboard according to the present invention has the same configuration as that in FIG. 1 and the same reference numerals are used.

2 is a diagram illustrating a process of transmitting control data to a disk by receiving a control command for reading or storing data to achieve the object of the present invention, and detailed information from the disk when an error occurs in the disk itself when reading or storing data. Receiving a notification of error occurrence, analyzing the received error occurrence, stopping the use of the disc, changing the position of the sector where the error occurred, and receiving a normal response in response to the provided command. It is a process of reusing it.

Hereinafter, an operation according to an embodiment of the present invention will be described in detail with reference to FIG. 2.

In operation 210, the maintenance processor 110 detects whether a write command is input from the user. When the write command is detected, the maintenance processor 110 configures a CPB table included in a Command Descriptor Block (CDB) table in step 212.

In operation 214, the maintenance processor 110 configures the CPB table having information CPB to be transmitted to the SCSI adapter 112. The CPB has an I.D of a disc to be recorded, a start address pointer of an internal memory to record the returned data, information indicating the size of the disc, and information specifying a protocol with the SCSI adapter 112.

When the configuration of the CPB table is completed, the maintenance processor 110 proceeds to step 216 to perform a protocol between the maintenance processor 110 and the SCSI adapter 112, the CPB table having the configured CDB table Send it.

When the execution of the protocol and the transmission of the table are terminated, the SCSI adapter 112 may control the maintenance processor 110 to set an instruction start bit, which is an area indicating the start of the instruction of the RCB table, in step 218. If the command start bit of the RCB table is set in step 220, the SCSI adapter 112 determines whether the received CPB table matches the set format.

If it is determined in step 222 does not match, the SCSI adapter 112 proceeds to step 224 to transmit the data requesting retransmission to the maintenance processor (110). In step 226, if the CPB table including the CDB table is re-received in response to the retransmission request, the SCSI adapter 112 proceeds to step 228 to determine whether the re-received table matches the set format.

If the table matches the format set in step 222 or step 228, the SCSI adapter 112 proceeds to step 230 and analyzes the information registered in the received CPB table.

The SCSI adapter 112 transmits the information analyzed in step 230 to the HDD 114 in step 232. The transmission in accordance with the protocol consists of a bus standby step, adjustment step, selection (non-selection) step, information transmission step (command step, data output step, message output step, status step, data input step, message input step) .

The HDD 114 performs a write or read command according to the information received in step 234. When the command processing is completed, the HDD 114 transmits the state value corresponding to the processing result to the SCSI adapter 112 in step 236.

When receiving the processing result state value, the SCSI adapter 112 analyzes the state value in step 238 to search whether an error is detected.

If no error is detected in step 238 (0x00), the normal processing result is converted into data and transmitted to the maintenance processor 110 in step 240, and the service is terminated.

However, if an error is detected in step 238 (0x02), the SCSI adapter 112 configures request sense data for identifying an abnormal cause of the corresponding disk in step 242. In step 244, the configured request sense data is transmitted to the HDD 114.

Accordingly, the HDD 114 performs an error checking command in step 246. That is, the area of the sector where an error is detected in the disk is searched. When the search is completed, the HDD 114 transmits 14 bytes of sense result data according to the execution result to the SCSI adapter 112 in step 248.

When the execution result is received, the SCSI adapter 112 checks the third byte of the received data in step 250 and analyzes whether an error is detected. If the error is not analyzed, the service is terminated after transmitting normal result data to the maintenance processor 110 in step 252.

However, if an error is detected in step 250, the SCSI adapter 112 checks the counted value by incrementing the counter by one in steps 254 and 256. In step 242, the error check is executed again. Otherwise, when the count value is set in step 256, the SCSI adapter 112 transmits error data to the maintenance processor 110 in step 258. The error data has a name of a device, a location of a block in which an error occurs, and address information in which an error occurs.

When the error data is input, the maintenance processor 110 receives the error data as an interrupt in operation 260 and switches to the error recovery mode. In operation 262, the maintenance processor 110 analyzes the error data received in operation 258 to set an area for re-storing data stored in an area of the disk where an error occurs.

When the setting is completed, the maintenance processor 110 records the ID, which is the disk to be restored, the start address pointer of the internal memory in which the data to be stored, the protocol designation, and the command file synchronization are recorded in steps 264 and 266. And a CDB table having a CPB table for specifying a message and a resave command provided in the CPB table.

When the table configuration is completed, the maintenance processor 110 transmits the CPB table having the configured CDB table to the SCSI adapter 112 in step 268. When the transmission of the CPB table is terminated, the SCSI adapter 112 sets an area indicating the start of the instruction of the RCB table under the control of the maintenance processor 110 in step 270. If the instruction start bit of the RCB table is set in step 272, the SCSI adapter 112 proceeds to step 274 to determine whether the received CPB table is suitable for the set format. If the format is not set, the CPB table including the CDB table is retransmitted in steps 276 and 278.

If it is determined that the retransmitted CPB table is in the format set in step 280, the SCSI adapter 112 analyzes the received CPB table in step 282. When the analysis is completed in step 282, the SCSI adapter 112 transmits the CDB table to the HDD 114 in step 284.

The HDD 114 reads the accessed data by accessing an address including block data to be reassigned according to a command registered in the received CDB table in step 286. The read data is transmitted to the SCSI adapter 112 in step 288 under the control of the HDD 114. In addition, in step 290, the SCSI adapter 112 accesses and transmits an address corresponding to an area of a disk to which data provided from the HDD 114 is to be re-registered. On the other hand, the SCSI adapter 112 is required to temporarily store the data to be re-registered, which can be implemented by using an internal memory provided in the SCSI adapter 112. It will be apparent that the SCSI adapter 112 has a predetermined memory.

The HDD 110 re-stores the data received in operation 292 in the area of the accessed disk and transmits the state according to the processing result to the SCSI adapter 112.

If it is determined in step 294 that the received state is abnormal, the SCSI adapter 112 transmits a command for requesting a sense value. In step 300, the information received from the HDD 114 in response to the request command is recorded in the CPB table.

However, if it is determined that the steady state in step 294, the SCSI adapter 112 records the normal result in the CPB table in step 296. When writing to the CPB table is completed, the SCSI adapter 112 configures the CPB table in step 304, and proceeds to step 306 to transmit the maintenance to the maintenance processor 110. The maintenance processor 110 analyzes the CPB table received in step 308 and terminates the service.

As described above, since a function of diagnosing and recovering a damaged sector of a hard disk is implemented according to the present invention, it is possible to prevent a failure of the exchange system due to lost data and to prevent an interruption of service. There is an effect to prevent the loss of the most important billing data.

Claims (2)

To detect a disk error of an all-electronic exchange having a maintenance processor, a hard disk drive for storing and managing initial programs, billing data, and statistical data of the all-electronic exchange, and a SCSI adapter controlling the hard disk drive; In the recovery method, the process of allocating the memory area to be re-stored by analyzing the error data when the error occurrence is detected according to the execution of the command, and reading the data of the area where the error occurs when the memory area to be re-stored, And storing the read data in the memory area to be re-stored. Detecting and recovering disk errors in an electronic switchgear having a maintenance processor, a hard disk drive for storing and managing initial programs, billing data, and statistical data of the electronic switchgear, and a SCSI adapter controlling the hard disk drive. The method may further include: executing a command of the maintenance processor on the hard disk drive, notifying an error occurrence to the SCSI adapter when an error is detected during execution of the command, and when the error is detected, Reconfirming at the request of a SCSI adapter, transmitting error data to the maintenance processor when the occurrence of the error is reconfirmed, allocating a memory area to be reconstructed in the maintenance processor based on the error data; Receiving the allocated memory area A process of requesting data of the region where the error occurs by the casa adapter, a process of the hard disk drive reading data of the region where the error has occurred by the request, and the data receiving the read data And a SCSI adapter outputting the read data together with the allocated memory area, and writing the received data to the allocated memory area by the hard disk driver provided with the output data. Characterized in the disk error detection and recovery method.