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RAID (Redundant Array of Independent Disks) based data reading and writing method and system thereof

A data reading and writing, data technology, applied in the direction of memory address/allocation/relocation, input/output to record carrier, etc., can solve the problem of low read and write performance of RAID data, and achieve the effect of improving read and write performance

Inactive Publication Date: 2013-08-28
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a method and system for reading and writing data based on RAID, which is used to solve the problem of low data reading and writing performance of RAID in the prior art when member disks in RAID fail to read and write data.

Method used

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  • RAID (Redundant Array of Independent Disks) based data reading and writing method and system thereof
  • RAID (Redundant Array of Independent Disks) based data reading and writing method and system thereof
  • RAID (Redundant Array of Independent Disks) based data reading and writing method and system thereof

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Embodiment Construction

[0040] In view of the above-mentioned problems existing in the prior art, the embodiment of the present invention provides a RAID-based data reading and writing scheme, so that when a member disk in the RAID fails to read and write, only the data that fails to read and write in the member disk is divided into blocks Carry out logical offline processing, and make the stripe to which the data block belongs perform data read and write operations in a degraded manner without affecting the read and write performance of other stripes, thereby improving the data read and write of RAID compared with the existing technology performance.

[0041] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0042]In the embodiment of the present invention, each member disk of the RAID stores data in the form of stripes, and the basic unit of forming a stripe is a block (may include: data block, check block), therefore, the block ...

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Abstract

The invention discloses an RAID (Redundant Array of Independent Disks) based data reading and writing method and a system thereof. The method comprises the following steps of: during carrying out reading / writing operations on data subblocks in the RAID, if reading / writing failures occur, recording data subblocks with resding / writing failures to an off-line data subblock list; and when the reading / writing operations are needed to be carried out on the RAID, if the information of a target data subblock of the current reading / writing operation is queried in the off-line data subblock list, carrying out the current reading / writing operation by using other data subblocks and verification subblocks in a strip to which the target data subblock belongs. The invention can improve the reading / writing property of the RAID.

Description

technical field [0001] The invention relates to the technical field of data storage, in particular to a RAID-based data reading and writing method and system thereof. Background technique [0002] RAID (Redundant Array of Independent Disks, Redundant Array of Independent Disks) is a disk array formed by combining multiple independent disks in different combinations. Wherein, the multiple independent disks are referred to as member disks of the RAID. Because RAID performs read or write operations on data simultaneously through multiple member disks, the data transfer rate is improved; moreover, RAID can provide fault tolerance through data verification / mirroring functions, thereby enhancing the security of data read and write. Therefore, RAID has been widely used in various fields of data reading and writing. [0003] The different combinations of member disks in the RAID are represented by RAID levels. Currently, RAID levels include: RAID 0, RAID 1, RAID 10, RAID 5, etc. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06G06F12/06
Inventor 孙策夏飞
Owner NEW H3C TECH CO LTD