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Method and apparatus for creating redundancy array in disc RAID

A redundant array of disks and disk technology, applied in the creation field of redundant arrays of disks RAID, can solve the problems of wasted disk space and low disk effective space utilization, and achieve the effect of increasing effective space utilization

Active Publication Date: 2010-01-06
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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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

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  • 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

[0055] 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.

[0056] 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:

[0057] In step S401, the disk storage controller combines at least two small-capacity disks into a virtual disk.

[0058] 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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IPC IPC(8): G06F3/06
Inventor 孙策
Owner NEW H3C TECH CO LTD
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