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Data recovery method and device

A data repair and data technology, applied in the computer field, can solve the problems of increasing the cost, increasing the time of data repair, reducing the efficiency of data repair, etc., to achieve the effect of reducing cost, improving efficiency and reducing time

Active Publication Date: 2018-05-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] When a head fails, other heads in the disk where the head is located can still normally access the data stored in the corresponding disk. Therefore, formatting the entire disk not only increases the cost of data recovery, but also increases the time for data recovery. , reducing the efficiency of data repair

Method used

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Embodiment Construction

[0059] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0060] Before explaining the embodiment of the present invention in detail, the system architecture of the embodiment of the present invention is introduced first. figure 1 A data repair system architecture diagram provided for the embodiment of the present invention, such as figure 1 As shown, the data recovery system includes an upper-level system and multiple disks, and the upper-level system is connected to the multiple disks respectively. Wherein, the plurality of magnetic disks may respectively include a plurality of disks and a plurality of magnetic heads, the plurality of disks are used to store data, and the plurality of magnetic heads are used to respectively access the data stored on the plurality of disks, the upper system ...

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Abstract

Provided are a data recovery method and apparatus, which fall within the field of computers. The method comprises: receiving fault notification information about a magnetic head, wherein the fault notification information about the magnetic head carries identification of a faulty magnetic head (201); based on the identification of the faulty magnetic head, determining a backup position of target metadata, wherein metadata of the faulty magnetic head is stored at the backup position of the target metadata, and each of the magnetic heads is provided with a metadata backup position in advance (202); acquiring metadata corresponding to the faulty magnetic head from the backup position of the target metadata, wherein the metadata is used to describe a data address and attribute information about data stored in a target disk sheet, and the target disk sheet is a disk sheet which is accessed by the faulty magnetic head (203); and based on the attribute information described by the acquired metadata, recovering the data stored in the target disk sheet (204).By means of metadata stored in a backup position of target metadata, data stored in a target disk sheet corresponding to a faulty magnetic head can be rapidly recovered, thereby reducing the cost of recovering data of an upper layer system, and improving the efficiency of data recovery.

Description

technical field [0001] The invention relates to the field of computers, in particular to a data restoration method and device. Background technique [0002] The magnetic head and the platter are the most basic components of the disk, and in order to meet the capacity requirements of the disk, the disk can include multiple heads and multiple platters, and one head can access the data stored in one platter, that is, , the magnetic head is a key component of the disk to access data. When a magnetic head fails, the data stored on the disk corresponding to the magnetic head cannot be accessed. Therefore, it is particularly important to restore the data stored in the disk corresponding to the magnetic head. [0003] At present, the process of data recovery can be as follows: when receiving the magnetic head failure information, determine that the entire disk where the faulty magnetic head is located is faulty, at this time, you can directly backup all the data stored in the entir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/14
CPCG06F11/14
Inventor 罗庆超
Owner HUAWEI TECH CO LTD
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