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Magnetic disc fault processing and data restructuring method in magnetic disc array system

A fault handling method and disk array technology, applied in hardware redundancy for data error detection, response error generation, hardware monitoring, etc., can solve the problems of low performance and high risk, and improve availability and fault tolerance. , the effect of reducing the risk of data reconstruction

Inactive Publication Date: 2008-10-01
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of high risk and low performance in the data reconstruction process of existing disk arrays, thereby providing a low-risk, high-efficiency disk array failure processing and data reconstruction method

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  • Magnetic disc fault processing and data restructuring method in magnetic disc array system
  • Magnetic disc fault processing and data restructuring method in magnetic disc array system
  • Magnetic disc fault processing and data restructuring method in magnetic disc array system

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Embodiment Construction

[0047]Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0048] The basic idea of ​​the fault processing and data reconstruction method of the present invention is: when the disk data fails, first copy the data blocks at the location where the fault occurred on the master disk to the slave disk, and then copy all the data blocks on the fault master disk from the previous disk to the slave disk. After that, migrate to the slave disk one by one to complete a recovery process. Compared with the prior art, the present invention does not regard the partial damage of the disk as the damage of the whole disk, and does not set the working disk to the "fault" state after detecting the failure of the working disk, and does not set the faulty working disk Remove it from the disk array, but keep the failed disk in the disk array as a valid disk. This can improve the performance of data reconstruction on the one ha...

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Abstract

The present invention provides a disk fault processing method in a disk array system and a data reconstruction method, including: the disk of the disk array generates read-write faults; the fault data block is located, the residual correction data of the fault disk is retained, the fault information table is checked, the strip of the faulty data block whether existing other fault data blocks or not is judged, if yes, the disk array system is provided to a ''read-only mode'', forbidding user execute write operation, if not, the position information of the fault data block is recorded in the fault information table, then whether a redundancy data disk existing in the disk array system or not is judged, if not, entering in the ''degradation'' operation mode, otherwise, the fault data block is processed with data reconstruction, recovering the fault data.

Description

technical field [0001] The invention relates to the field of data storage, in particular to a disk failure processing and data reconstruction method in a disk array system. Background technique [0002] Disk array (RAID, referred to as Redundant Array of Independent Disks) is a combination of multiple independent hard disks (physical hard disks) in different ways to form a hard disk group (logical hard disk), thus providing higher storage performance than a single hard disk. and technology to provide data backup. As a mature technology, RAID technology is widely used in disk array systems. Disk arrays are divided into different RAID levels (RAID Levels) according to the different ways in which independent hard disks form disk arrays. There are seven basic RAID levels from RAID 0 to RAID 6 in the prior art. Different RAID levels represent different storage performance, data security, storage cost, algorithm complexity and data redundancy. [0003] In most RAID levels, whe...

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Application Information

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IPC IPC(8): G06F11/20G06F11/34
Inventor 马一力吴忠杰纪海涛韩晓明李一鸣
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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