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A data recovery method of raid-5

A technology of RAID-5 and recovery method, which is applied in the direction of data error detection and response error generation, which can solve the problems of poor applicability and low recovery success rate of data recovery methods, and achieve strong universal applicability Sexuality and high recovery success rate

Active Publication Date: 2016-06-08
厦门市美亚柏科信息安全研究所有限公司
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Problems solved by technology

[0007] The technical problem to be solved by this invention is to provide a data recovery method of RAID-5, which can accurately analyze the RAID information of RAID-5, and utilize the RAID information to carry out data recovery, so as to solve the problems of the existing RAID-5 data recovery method. Problems of poor general applicability and low recovery success rate

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Embodiment Construction

[0089] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0090] refer to figure 1 , shows the flowchart of the first embodiment of the data recovery method of RAID-5 of the present invention, including the following steps:

[0091] S1, search for the DBR of the NTFS partition in all disks of the RAID-5 and obtain the DBR, where the DBR is a DOS boot record.

[0092] S2, obtain the master file table $MFT according to the DBR;

[0093] S3, obtain the stripe size SSN according to $MFT.

[0094] S4. Obtain the stripe start sector SSS, the left and right structure of the disk, the disk sequence, the synchronization and asynchronous conditions of the disk, and the data start sector BSN.

[0095] S5, perform data recovery according to the SSN, SSS, the left and right structure of the disk, ...

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Abstract

The invention provides a data recovery method of an RAID-5 (Redundant Array of Independent Disk 5), which comprises the steps that an DBR (Dos Boot Record) of an NTFS (New Technology File System) partition is acquired; a $ MFT (Master File Table) is acquired according to the DBR; a strip size SSN is acquired according to the $ MFT; an SSS (Strip Starting Sector) , left and right structures of a disk, a disk sequence, synchronous and asynchronous situations of the disk, and a data starting sector BSN are acquired; and data recovery is performed according to the SSN, the SSS, the left and right structures of the disk, the disk sequence, the synchronous and asynchronous situations of the disk, and the BSN. With the adoption of the method, RAID information of the RAID-5 can be analyzed accurately, and the data recovery is performed by using the RAID information. The method has better general applicability and higher recovery success rate.

Description

technical field [0001] The invention relates to the field of data recovery, in particular to a RAID-5 data recovery method. Background technique [0002] Redundant Array of Independent Disks (Redundant Array of Independent Disks, RAID) refers to combining multiple physical disk drives into a large-capacity virtual disk drive in hardware or software through a RAID controller. The basic principle of RAID is to use the bit strip (BitStriping) and the current mainstream block strip (BlockStriping) segmentation method to scatter and store the same data into different data blocks (DataBlocks) in each disk drive, so that any disk drive When the data block is damaged, the XOR operation is used to compare and calculate the parity disk segments (ParityBlocks) and the data in the data block stored in other disk drives, so as to rebuild (Rebuild) the damaged data. [0003] When data is stored in RAID, data storage is performed by multiple read-write heads on multiple physical disk driv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/14
Inventor 王大彬
Owner 厦门市美亚柏科信息安全研究所有限公司
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