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Write operation method for mapping cheap magnetic disc redundant array equipment

A technology of redundant array of disks and write operations, the redundancy applied in the operation is used for data error detection, response error generation, input/output to the record carrier, etc. RAID device data integrity and other issues to ensure robustness and easy operation

Inactive Publication Date: 2009-02-04
INVENTEC CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is a problematic sector on the disk, the RAID device thinks that the disk is damaged, so it becomes offline (Degrade) or damaged mode, making the RAID device unusable
If the entire RAID device is unavailable only because of the damage of one sector or a small number of sectors of the disk, the loss for the user is too great
And the single disk fault-tolerant mechanism of prior art can't play a role in the RAID equipment that can rebuild (Rebuild) operation, it can only protect the data of a single disk, but can't guarantee the integrality of all data of RAID equipment

Method used

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  • Write operation method for mapping cheap magnetic disc redundant array equipment
  • Write operation method for mapping cheap magnetic disc redundant array equipment
  • Write operation method for mapping cheap magnetic disc redundant array equipment

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Embodiment Construction

[0056] Regarding the features and implementation of the present invention, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

[0057] Please refer to figure 1 and figure 2 , which represents the initialization process of the mirroring device 200 according to the present invention and the structure of the mirroring device 200 after initialization. The mirror device 200 is created on each member disk of the RAID device, and is created in a RAID-1 manner. As shown in the figure, first divide the disk space for the mirroring device 200 among the member disks of the RAID device according to predetermined values ​​(step 100 ). Wherein, the preferred predetermined value is 5%. During use, when the size of the data to be imaged exceeds the space of the mirroring device 200, the system prompts the user that the mirroring device 200 cannot be used normally, but data reading operations can still be performed. Determine whether the ope...

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Abstract

Disclosed is a write operation method of an image RAID device, including that the image device is initialized; each member magnetic disc of the RAID device is created; the kernel thread is activated to monitor the operation state of the RAID device and record the current use information; when the member magnetic disc of the RAID device has error write operation, the data with error write operation is stored in the image device of another member magnetic disc of the RAID device through the kernel thread. The method can guarantee the integrity and safety of the data stored by the RAID device; the data is ensured not to be lost when the member magnetic disc of the RAID device is replaced or damaged seriously; meanwhile, the robustness of the RAID device is guaranteed; the damage of a single member magnetic disc of the RAID device has no influence on the data of the whole RAID device.

Description

technical field [0001] The invention relates to a disk management method, in particular to a method for writing operation of an image cheap disk redundant array device. Background technique [0002] Redundant Arrays of Inexpensive Disks (RAID) devices combine N hard disks into a virtual single large-capacity hard disk through a RAID controller (which can be hardware or software) to provide greater storage capacity and faster access speed or data redundancy features. According to the different data organization methods, RAID devices can be divided into Linear (linear mode), disk array 0 (RAID-0), RAID-1, RAID-5, RAID-6, etc. Among them, RAID-1, RAID-5 and RAID-6, as well as RAID-10 and RAID-50 extended from them, all provide data redundancy functions. [0003] The data redundancy function means that by storing redundant data in the RAID device, when one or more hard disks in the RAID device are damaged, the complete data can still be obtained from the RAID device through a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14G06F3/06
Inventor 王建飞陈玄同刘文涵
Owner INVENTEC CORP
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