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Method and apparatus for creating redundancy array in disc RAID

A technology of redundant array of disks and disks, applied in the creation field of redundant arrays of disks RAID

Active Publication Date: 2011-06-29
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]Based on the above analysis, when there are small-capacity disks, when RAID is created in the prior art, the effective space utilization rate of the disks is low, resulting in a large amount of disk space waste of

Method used

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  • Method and apparatus for creating redundancy array in disc RAID
  • Method and apparatus for creating redundancy array in disc RAID
  • Method and apparatus for creating redundancy array in disc RAID

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Embodiment Construction

[0056] The basic idea of ​​the present invention is when there are small-capacity disks in the disks forming the RAID, by virtualizing at least two small-capacity disks into one large-capacity disk, and creating a RAID together with the virtualized large-capacity disks and other large-capacity disks , so as to achieve the purpose of increasing the effective space utilization of the disk.

[0057] A method for creating a redundant array of disks RAID proposed by the present invention is used to construct several disks as a RAID, and the several disks include at least one large-capacity disk and at least two small-capacity disks whose capacity is smaller than the aforementioned large-capacity disk ,like Figure 4 As shown, the method includes the following steps:

[0058] In step S401, the disk storage controller combines at least two small-capacity disks into a virtual disk.

[0059] Step S402, the disk storage controller creates RAID according to the virtual disk and the lar...

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Abstract

The invention discloses a method for creating redundancy array of disc RAID, comprising the following steps: a disc storage controller combines at least two small-volume discs into a virtual disc, creates RAID according to the virtual disc and a large-volume disc, strips the RAID and reads and writes data with the striped RAID. In the invention, when discs of different volumes are available, the small-volume discs are combined together to form the virtual disc for creating the RAID with the virtual disc and the large-volume disc, thereby increasing the use ratio of useful space of discs; besides, the usability of the whole RAID is not affected when two discs in different positions of the virtual disc are damaged.

Description

technical field [0001] The invention relates to the field of storage technology, in particular to a method and device for creating a redundant array of disks RAID. Background technique [0002] RAID (Redundant Array of Inexpensive Disks, Redundant Array of Disks) is a high-performance, high-reliability storage technology that provides logical storage for application terminals or terminal clusters by combining a series of individual disks in different ways disk. Among them, the advantages of using RAID include: expanding disk capacity, improving disk read and write performance and data security. [0003] Specifically, RAID technology has been widely used in various occasions of data storage, long-used RAID technology includes RAID0, RAID1, RAID5, RAID6, RAID10, etc.; wherein, RAID0 does not have redundancy capability, and RAID1 is not a complete disk array; However, RAID5, RAID6, and RAID10 are composed of multiple disks (for example, no less than 3 disks for RAID5 and RAID...

Claims

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Application Information

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