Method for realizing magnetic disc redundant array rebuilding and magnetic disc redundant array

A redundant array of disks, disk technology, applied in the direction of input/output to the record carrier, etc., can solve the problem of unable to effectively improve the reconstruction speed and reduce the I/O load.

Active Publication Date: 2008-03-05
NEW H3C TECH CO LTD
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Problems solved by technology

[0015] It can be seen that the existing RAID reconstruction scheme combining copy and calculation fails to fundamentally reduce the I / O load caused by the reconstruction process, and cannot effectively improve the reconstruction speed

Method used

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  • Method for realizing magnetic disc redundant array rebuilding and magnetic disc redundant array
  • Method for realizing magnetic disc redundant array rebuilding and magnetic disc redundant array
  • Method for realizing magnetic disc redundant array rebuilding and magnetic disc redundant array

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Embodiment Construction

[0089] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0090]Because the member disk is in failure state just because its failure sector has exceeded a certain threshold value, not all sectors in this disk are all inaccessible, therefore, the member disk in RAID of the present invention becomes failure state and makes this RAID After being in a degraded state and adding a new member disk so that the number of normal member disks included in the RAID can ensure that the RAID has redundancy, start rebuilding; during the rebuilding process, according to the preset unit storage space size, for example, one or Multiple sectors, sequentially copy the data in each unit storage space in the failed member disk to the corresponding new member disk, if the copy is successful, continue to copy the data in the next unit ...

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Abstract

In process of recreating a RAID, according to the size of preset storage space unit, sequentially copying the data in each storage space unit in the failure member disks to the new member disks; if the copy is successful, then copying the data in next storage space unit into the new member disks; if the copy is failure, then reading out the data in other normal member disks to make calculation to get the data in the failure storage space unit, and then writing the data to the new member disk, and then continuing the copy of the next storage space unit.

Description

technical field [0001] The invention relates to a reconstruction technology of a redundant array of disks (RAID), in particular to a method for realizing RAID reconstruction and a RAID for realizing reconstruction. Background technique [0002] RAID is aggregated by multiple disks, which can provide higher access speed, better availability, and data redundancy protection while providing large capacity. The disks in the RAID may be referred to as member disks of the RAID, and each member disk not only stores data externally written to the disk, but also stores redundant data in other member disks. [0003] RAID will change between the following three states: normal state, that is, all member disks in the RAID are in the normal state, and the RAID array is in the normal state, as shown in Figure 1. In Figure 1, the RAID includes 4 member disks For example; degraded state, that is, some member disks fail (for example, the number of failed sectors in the member disk is equal to...

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Application Information

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