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Data reconstruction method for Redundant Array of Independent Disks (RAID) and appliance thereof

A technology of independent disk redundancy and data reconstruction. It is applied in the direction of redundancy code error detection and response error generation. It can solve problems such as big data and damage, and achieve the effect of reducing the amount of data and shortening the time.

Inactive Publication Date: 2009-11-11
NEW H3C TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

Because in the data reconstruction process, the RAID array can no longer withstand the damage of any data disk, and the longer the data reconstruction time, the greater the risk of data damage, therefore, there is a large data damage in the existing RAID data reconstruction method risk

Method used

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  • Data reconstruction method for Redundant Array of Independent Disks (RAID) and appliance thereof
  • Data reconstruction method for Redundant Array of Independent Disks (RAID) and appliance thereof
  • Data reconstruction method for Redundant Array of Independent Disks (RAID) and appliance thereof

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Embodiment Construction

[0049] The present invention evenly copies the data in the data disk to the hot spare disk when the RAID is normal, and when a certain data disk in the RAID fails, the RAID can be reconstructed according to the data that has been copied to the hot spare disk. Reduce the amount of data for RAID reconstruction and shorten the time for RAID reconstruction.

[0050] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0051] Such as Figure 4 As shown, it is a flow chart of a RAID data reconstruction method in the present invention, which is applie...

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Abstract

The invention discloses a data reconstruction method for Redundant Array of Independent Disks (RAID), which is used for data reconstruction of RAID. The RAID comprises a plurality of data disks and at least one hot spare disk; wherein, the amount of the hot spare disk is less than that of the data disk. The method comprises the following steps: when RAID is in normal operation, part of data in each data disk is copied into the hot spare disk; when a data disk breaks down, data reconstruction is carried out on RAID according to the stored data in the hot spare disk which are from the broken-down data disk and the data of other data disks. In the invention, when the data disk is in normal operation, data in the data disk is copied into the hot spare disk so as to reduce reconstructed data volume of RAID, shorten reconstructed time of RAID and lower the risk of data corruption. The invention also discloses a device which applies the method provided in the invention.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to a redundant array of independent disks RAID data reconstruction method and device. Background technique [0002] With the rapid development of science and technology and the widespread application of computer technology, people have higher and higher requirements on the performance of storage devices. As a mature technology, RAID (Redundant Array of Independent Disk, Redundant Array of Independent Disks) technology has been widely used in various occasions of data storage. RAID is a structure that combines disk arrays with data striping to improve data availability. Data redundancy is achieved through data mirroring, data can be read directly from mirrored copies, and multiple data disks are controlled by RAID. It can be combined into a virtual single large-capacity hard disk, and the data transmission rate can be improved by using multiple disks at the same time, and the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/07G06F11/08G06F11/10
Inventor 余剑声
Owner NEW H3C TECH CO LTD
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