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RAID control method, device and system

A control method and controller technology, applied in the direction of input/output to the record carrier, etc., can solve the problems of reducing the reliability of the disk system, data errors, etc., and achieve the effect of avoiding read and write operations, reducing the possibility, and improving the reliability.

Active Publication Date: 2011-03-09
CHENGDU HUAWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the reconstruction process, a large number of read and write operations will be performed on the data, and frequent read and write operations are likely to cause unrecoverable read errors on other member disks in the RAID, which greatly increases the possibility of data errors and reduces the disk capacity. system reliability

Method used

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  • RAID control method, device and system

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Embodiment Construction

[0024] Embodiments of the present invention provide a RAID control method, device and system, which are used to improve the reliability of a disk system.

[0025] see figure 1 , a specific embodiment of the RAID control method in the embodiment of the present invention includes:

[0026] 101. Perform striping processing on the created RAID group to generate LDS;

[0027] In the embodiment of the present invention, the disk is virtually divided into multiple disk units, and the created RAID group is striped to generate an LDS. The RAID group is composed of LUNs, and the LUN is composed of a matrix with LDS rows.

[0028] 102. When the available capacity of the LUN in the RAID group is greater than or equal to the preset capacity threshold, write the data to be processed;

[0029] When the available capacity of the LUN in the RAID group is greater than or equal to the preset capacity threshold, the data to be processed is written to the disk unit in the matrix and the mirror u...

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Abstract

The embodiment of the invention discloses an redundant array of inexpensive disks (RAID) control method for improving the reliability of a disk system. The method comprises the following steps: striping an established RAID group to generate an logic disk unit stripe (LDS), wherein, the RAID group is composed of logical unit number (LUN), and the LUN are composed of a matrix with the LDS as a row; when the available capacity of the LUNs in the RAID group is greater than or equal to a preset capacity threshold value, writing the data to be processed into disk units in the matrix and mirror image units corresponding to the disk units; and when one of the disk units in the LDS is invalid, reconstructing the RAID group with the data in the mirror image units corresponding to the invalid disk unit and other data in the invalid disk unit in the LDS. The embodiment of the invention further discloses an RAID controller and a data storage system. The embodiment of the invention can improve the reliability of the disk system.

Description

technical field [0001] The present invention relates to the technical field of computer storage, in particular to a RAID control method, device and system. Background technique [0002] With the rapid development of computer technology, as a commonly used external storage, the performance and reliability of disk have attracted more and more attention. In existing disk applications, Redundant Array of Inexpensive Disks (RAID, Redundant Array of Inexpensive Disks) technology is to combine multiple independent physical disks in different ways to form a disk group, providing logical Disk, which can provide higher storage performance than a single disk and provide data backup technology. In practical applications, a RAID group can be created on a disk for RAID, and the RAID group corresponds to one or more logical unit numbers (LUNs), so as to improve data read and write performance and storage performance. [0003] Commonly used RAID technologies include RAID 0, RAID 1, RAID 5...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
Inventor 关伟平
Owner CHENGDU HUAWEI TECH