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RAID (Redundant Array of Independent Disk) data self-repairing method

A self-healing and data technology, the redundancy applied in the hardware is used for data error detection, response error generation and other directions, which can solve the problem of data inability to write, improve performance, facilitate management, and reduce addressing distance. Effect

Inactive Publication Date: 2013-03-13
LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The other is a bad sector caused by physical damage, and data will never be written into this sector

Method used

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  • RAID (Redundant Array of Independent Disk) data self-repairing method
  • RAID (Redundant Array of Independent Disk) data self-repairing method
  • RAID (Redundant Array of Independent Disk) data self-repairing method

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Embodiment Construction

[0030] The method of the present invention is described in detail below with reference to the accompanying drawings.

[0031] The method of the present invention divides data into multiple data units, and a local reserved area is set for the data of each data unit; once a certain sector is damaged, the data of the bad sector is transferred to the reserved area, In addition, a global reserved area is set at the end of the disk. Once an error occurs due to a bad sector in the local reserved area, the data will be transferred to the global reserved area in time to prevent data loss, such as figure 1 Shown: bad sector fault decision mainly has the following two aspects:

[0032] 1) Error reporting through sector reading and writing, as a failure decision for data transfer;

[0033] 2) Periodically scan the hard disk to find media or data errors, as a failure decision for data transfer.

[0034] data layout

[0035] When creating a RAID, first divide the data area into multip...

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Abstract

The invention provides an RAID (Redundant Array of Independent Disk) data self-repairing method. According to the method, data are reserved segmentally, so that the shifting performance can be improved, and the addressing distance is reduced; data can be shifted in a laminated way, so that convenience is brought to management; reserved areas are scattered, so that bad sectors are prevented from being generated in a certain area in a centralized way, or a certain reserved area can be shifted when damaged; and segmental reservation is adopted, even though one or more reserved areas are damaged, shifting to a global reserved area can be continued.

Description

technical field [0001] The invention relates to the field of computer systems and storage, in particular to a method for self-repairing RAID5 data. Background technique [0002] For the RAID system with redundant check information, the fault tolerance function has become the most popular feature of the disk array. In order to strengthen the fault tolerance function and enable the system to quickly rebuild data in the case of a disk failure, in order to maintain the system performance, generally All disk array systems can use the function of hot backup. The so-called hot backup is to designate one of the disks as a backup disk when the disk array system is established. This disk is not normally operated, but if a disk in the array occurs When a failure occurs, the disk array replaces the failed disk with a spare disk, and automatically rebuilds the data of the failed disk on the hot spare disk. Some disk arrays (such as RAID5) only allow one disk to fail, and when the second...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/16
Inventor 文中领古世磊
Owner LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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