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Data restoration method and device applied to storage array and storage device

A storage array and data repair technology, which is applied to redundancy in operations for data error detection, electrical digital data processing, and response error generation, etc. Storage devices cannot effectively repair storage array data and other issues

Active Publication Date: 2020-05-08
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] And part of the slash check data is stored in the storage unit of the row used to save user data, when two disks fail simultaneously (i.e. double disk failure), even if each storage unit in the Nth column of the storage array The saved data is not damaged, and it is very likely that the row check data, column check data and user data will be damaged at the same time, so that the storage device cannot effectively repair the damaged data in the storage array

Method used

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  • Data restoration method and device applied to storage array and storage device
  • Data restoration method and device applied to storage array and storage device
  • Data restoration method and device applied to storage array and storage device

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Embodiment Construction

[0034] see figure 1 , is a schematic structural diagram of an embodiment of the storage system of the present application.

[0035] Such as figure 1 As shown, the storage system may include a storage device 10 and a disk group 20 composed of at least four disks.

[0036] Wherein, the storage device may include: a processor 101 , a memory 102 and a communication module 103 . A processor 101 , a memory 102 and a communication unit 103 . These components communicate through one or more buses. Those skilled in the art can understand that the structure shown in the figure does not constitute a limitation to the present application. It can be a bus structure or a star structure, and can also include More or fewer components than shown, or combinations of certain components, or different arrangements of components.

[0037] The processor 101, as the control center of the storage device, uses various interfaces and lines to connect various parts of the entire electronic device, an...

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Abstract

The invention provides a data restoration method and apparatus applied to a storage array, and a storage device. The method comprises the steps of restoring corrupted data in data stored in each storage unit of a second specified row of the storage array by using uncorrupted data in the data stored in each storage unit of the second specified row and additional check data stored in a second specified storage unit; and restoring corrupted data in data stored in storage units of other rows except a first specified row and the second specified row one by one by using the check data and oblique line check data. By adopting the data restoration method and apparatus applied to the storage array, and the storage device, when two disks are out of operation at the same time, the corrupted user data in the data stored in each storage unit of the storage array is effectively restored, so that the condition that the corrupted data in the storage array cannot be restored is reduced.

Description

technical field [0001] The present application relates to the field of data storage, in particular to a data restoration method and device and a storage device applied to a storage array. Background technique [0002] A storage array is also called a disk array (English: redundant arrays of independent disks, referred to as: RAID) and refers to an array composed of independent disks with redundancy capabilities. When storing data, the storage device will select some storage units on each hard disk of the storage array to form a group, and each storage unit group is used to store user data and verification data, and make the user data and verification data satisfy Specific operation rules, so that if some data blocks are damaged, the damaged user data can be repaired by using the undamaged user data and check data in the storage unit group through this operation rule. [0003] Since a storage array is usually composed of multiple disks, in practical applications, data stored...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/14G06F3/06
CPCG06F3/0689G06F11/1471
Inventor 蒲贵友
Owner HUAWEI TECH CO LTD