A method and a device for repairing a file

A repair method and file technology, applied in the field of computer networks, can solve problems such as difficult data repair

Inactive Publication Date: 2018-12-18
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

By locating and eliminating the specific damaged data table items in the damaged disk image, the aut

Method used

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  • A method and a device for repairing a file
  • A method and a device for repairing a file
  • A method and a device for repairing a file

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Embodiment Construction

[0049] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0050] The steps shown in the flowcharts of the figures may be performed in a computer system, such as a set of computer-executable instructions. Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0051] In server virtualization application scenarios, when accidents such as power failures and system crashes occur, or data is overwritten due to user misoperations, there is an urgent need for a method that can repair user data in a timely manner to pr...

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Abstract

The invention discloses a method and a device for repairing a file. The invention relates to a computer network technology, and solves the problem of difficult data restoration. The method comprises the following steps of: locating damaged data table entries in a damaged disk image file; removing the damaged data table entries from the damaged disk image file. The technical proposal provided by the invention is applicable to disk mirroring files, and realizes automatic repair of disk mirroring files.

Description

technical field [0001] The invention relates to computer network technology, in particular to a file restoration method and device. Background technique [0002] Qcow2 is an upgraded version of the Qcow file format. It is a file format for saving disk images. It was originally used by QEMU as a disk image file format. The advantage of the Qcow2 format is that it supports thin allocation, that is, the size of the disk image file increases with the actual allocation of user data, which can make better use of disk space and reduce the waste of pre-allocation. The Qcow2 format has been widely used in virtualization scenarios, and most virtualization software supports this format. [0003] However, the image format of Qcow and Qcow2 also has defects, it does not support the log function similar to Linux. When the Qcow2 file is damaged, it cannot perform self-recovery and can only rely on the log function of the file system where it is located. However, most file systems genera...

Claims

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Application Information

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IPC IPC(8): G06F11/14
CPCG06F11/1471
Inventor 李宏伟
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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