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Improved disk array reconstruction method

A disk array and disk technology, applied in the direction of response error generation, redundant code error detection, input/output to record carrier, etc., can solve problems such as read and write performance impact, reconstruction failure, data loss, etc., to reduce data loss The risk of loss, the effect of shortening the time

Active Publication Date: 2011-04-13
UNITED INFORMATION TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] When a disk completely fails, the hot spare disk is used for reconstruction. During the rebuilding process, when another disk fails in the raid, the data on the raid may be lost; take a raid5 with 4 disks as an example, disk4 After a failure occurs, it is necessary to use the data and parity on disk1, disk2, and disk3 to rebuild, and write the reconstructed data to disk5. If any disk in disk1-disk3 fails during the reconstruction process, the reconstruction will fail, resulting in data failure. In addition, the reconstruction process is relatively slow, and the read and write performance of the raid will be greatly affected during the reconstruction process.

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Embodiment 1

[0038] The technical solution of the first embodiment only proposes the basic framework of the present invention, but there is no corresponding solution for the situation that some data on the faulty disk has been damaged. In view of this, Embodiment 2 of the present invention proposes a relatively complete technical solution, which can solve the above-mentioned technical problems.

[0039] The disk array reconstruction process proposed by the second embodiment of the present invention is as follows: figure 2 shown, including the following steps:

[0040] Step 201: Count various error counts on the disk in the RAID system, including but not limited to the total number of a certain type of error and the accumulated count of a certain type of error within a period of time.

[0041] Step 202: Determine whether the total count of a certain error type on a disk or the cumulative number of certain errors in a period of time exceeds a preset threshold, if yes, perform step 203, oth...

Embodiment 2

[0049] In the technical solution of the second embodiment, the disk copy is combined with the traditional reconstruction technology, and most of the data of the alarm disk is transferred to the hot spare disk by disk copy, so as to save the system reconstruction time; for the damaged data, then Recover data using traditional reconstruction methods.

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Abstract

The invention provides a disk array reconstruction method. The improved disk array reconstruction method comprises the following steps of: A, counting error counts in disks in a redundant array of independent disks (RAID) system; B, judging whether the error count in one disk of the RAID system exceeds a preset threshold value or not, if so, executing a step C, otherwise returning to the step a; C, setting the disk as a warning disk, activating a preset hot spare disk and replicating existing data in the warning disk into the hot spare disk; and D, after the replication, deleting the warning disk from the RAID system and substituting the hot spare disk for the error disk as the component disk of the RAID system. In the scheme, the risk of data loss in the reconstruction process can be effectively reduced and the reconstruction process is accelerated.

Description

technical field [0001] The present invention relates to the technical field of computer storage, in particular to redundant array of independent disks (Redundant Array of Independent Disks, RAID) technology, and in particular to an improved disk array rebuilding method. Background technique [0002] RAID is a technology that combines multiple independent disks in different ways to form a disk group (logical disk), thereby providing higher storage performance and data redundancy protection than a single disk. The principle of RAID technology is to store data and corresponding parity information on each disk that makes up the RAID system, and store parity information and corresponding data on different disks. When the data on a disk of the RAID system is damaged, use the remaining data and corresponding parity information to recover the damaged data. As the foundation and key component of the network storage system, RAID is famous for its fast speed, large volume and high rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/10G06F3/06
Inventor 卿翊轩
Owner UNITED INFORMATION TECH
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