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The data recovery method of raid-5

A RAID-5, recovery method technology, applied to the redundancy in the operation for data error detection, response error generation and other directions, can solve the problems of poor universality, low success rate, low data recovery accuracy, etc. Solve the effect of low accuracy

Active Publication Date: 2016-04-06
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 the present invention is to provide a data recovery method of RAID-5. Under the situation that the NTFS file system does not have a file record number, the RAID information of RAID-5 can be accurately analyzed, and data recovery can be performed using the RAID information. , to solve the problems of low accuracy, low success rate and poor universality of existing RAID-5 data recovery methods

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[0087] 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.

[0088] 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:

[0089] S1, acquiring a master boot record MBR.

[0090] S2, judging whether there is a file record number. If the judgment result is no, that is, there is no file record number, then go to S3.

[0091] S3, if there is no file record number, obtain the stripe size SSN, and obtain the stripe start sector SSS, the left and right structure of the disk, the disk sequence, the synchronization and asynchrony of the disk, and the data start sector BSN according to the MBR.

[0092] S4. Perform data recovery according to the SSN, SSS, left and right structure of the disk,...

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Abstract

The invention provides a data recovery method for RAID-5 (redundant array of independent disks 5). The method includes: acquiring a MBR (master boot record); judging whether a file record number exists or not; if not, acquiring an SSN (strip size number), and according to the MBR, acquiring an SSS (strip starting sector), left-right structure of disks, disk sequence, synchronous and asynchronous conditions of the disks, and a data starting sector BSN; and performing data recovery according to the SSN, the SSS, the left-right structure of disks, the disk sequence, the synchronous and asynchronous conditions of the disks, and the data darting sector BSN. The method has the advantages that RAID information of the RAID-5 can be analyzed accurately and data is recovered with the RAID information while no file record number exists in an NTFS (new technology file system), and accordingly the problems of low accuracy, low success rate and poor universality in the existing RAID-5 data recovery method are solved.

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 the combination of 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 disperse and store the same data into different data blocks (DataBlocks) in each disk drive. When a data block is damaged, the parity disk segments (ParityBlocks) stored in other disk drives and the data in the data block are compared and calculated by XOR operation 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 drives. Therefore, not only the ...

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Application Information

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