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Method for rebuilding data of magnetic disk array

A disk array and data reconstruction technology, which is applied in the direction of data error detection and response error generation, which can solve the problems that affect the read and write performance and reliability of the storage system, and require a lot of time.

Inactive Publication Date: 2008-12-24
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] The invention proposes a data reconstruction method of a disk array, which solves the problem that the existing disk array data reconstruction method takes too much time and affects the read-write performance and reliability of the storage system

Method used

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  • Method for rebuilding data of magnetic disk array
  • Method for rebuilding data of magnetic disk array
  • Method for rebuilding data of magnetic disk array

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Embodiment Construction

[0035] Hereinafter, the present invention will be further described in detail by taking disk array level 5 as an example with reference to the accompanying drawings.

[0036] figure 1 It is a schematic diagram of the relationship between each step of the present invention: after the initialization step is completed, it enters the log bitmap update step, when a member disk of the disk array fails, it enters the log-based reconstruction step, and when the user issues a shutdown command, it enters the end step.

[0037] figure 2 For the schematic diagram of the initialization step process of the present invention, the following operations are performed:

[0038] According to user instructions, open an existing disk array or create a new disk array, the main control module creates a log bit chart of the disk array, and each bit of the log bit chart corresponds to a stripe of the disk array; the main control module judges whether the disk array is To create a new disk array, if ...

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Abstract

The invention relates to a disk array data reconstruction method which pertains to a computer data storage method and solves the problem that the existing disk array data reconstruction method takes too much time and affects the reading and writing performances and reliability of a storage system. A disk array of the invention is provided with a main control module, reading and writing processing modules and a reconstruction module and comprises the steps of initialization, diary pot diagram update, reconstruction based on diaries and finishing. The method instructs data reconstruction process by the real-time monitoring of disk space using status of the disk array; when space that is not accessed is reconstructed, the only requirement is to write 0 in all corresponding data blocks newly added into a disk, thus greatly reducing physical disk visiting time brought by reconstruction, increasing reconstruction speed and reducing the response time of user access; the reconstruction method does not change the reconstruction procedure or the distribution manner of disk array data, can conveniently optimize various traditional disk array data reconstruction methods and is applicable to the construction of storage systems with high performance, high usability and high reliability.

Description

technical field [0001] The invention belongs to a computer data storage method, in particular to a data reconstruction method of a disk array. Background technique [0002] With the development of computer technology and network communication technology, the degree of informatization is getting higher and higher, and people's requirements for data reliability are getting higher and higher. Disk array RAID (Redundant Array of Independent Disks) is a typical device in the field of reliable storage systems. Compared with a single disk, the performance, availability and reliability of the disk array have been greatly improved. Among them, mirroring, parity, Hot backup and so on are commonly used fault tolerance technologies for disk arrays. When a member disk in the disk array fails and a new disk is added, the disk array can automatically switch to the reconstruction mode, and the reconstruction process continuously rebuilds the data blocks on the failed disk to the newly adde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14
Inventor 冯丹陈俭喜曾令仿吴素贞毛波庞丽萍
Owner HUAZHONG UNIV OF SCI & TECH
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