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Data protection and restore method based on instant restore type protection card for hard disk

A data protection and restoration-type technology, which is applied to data error detection, electrical digital data processing, and response error generation in the direction of data redundancy in computing, which can solve the problem of reducing system performance and disk life, disrupting elevator scheduling algorithms, etc. problem, to achieve reasonable disk space utilization and simple mapping table entries

Inactive Publication Date: 2009-07-01
EASYSAFECHINACO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inserting new read and write requests in the middle of normal disk read and write requests will disrupt the elevator scheduling algorithm of the operating system or disk system, reducing system performance and disk life

Method used

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  • Data protection and restore method based on instant restore type protection card for hard disk
  • Data protection and restore method based on instant restore type protection card for hard disk

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] The present invention will be described in detail below by taking a disk supporting the LBA working mode as an example.

[0018] First, the entire disk sector is linearly divided according to its LBA according to n sectors as a data protection unit (the value of n can only be a positive integer power of 2, generally 32, 64, 128). Here, the value of n is The value must be large enough to make the size of the disk bitmap acceptable, too small a value of n will cause the bitmap and mapping table to be too large, and too large a value of n will reduce disk space utilization, so n The value of needs to select an appropriate value according to the actual application environment. For a hard disk with a capacity of 80G, the sector capacity is 512 bytes. In the bit map, each data protection unit, that is, the protection status of a data block occupies 2 bits. If n is 64, then the entire bit map only needs to occupy 1280 sectors are 640KB of disk space. What needs to be pointed...

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PUM

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Abstract

The invention discloses a data protection and restoration method based on an immediate restoration type hard disk protection card, relates to the field of computer data security, and aims to solve problems in the prior art where bit diagrams and mapping tables are too large to be all resident in memory, and restoration points are established Afterwards, it is necessary to subcontract and read data, thereby greatly reducing the technical problem of the read and write performance of the disk system. The present invention is characterized in that a self-defined data protection unit is used; when a data block is mapped for the first time, all protected data blocks will be copied In the mapping block in the mapping area, the subsequent disk read and write requests directly operate on the mapping area without subcontracting; through the present invention, the interference to the original disk read and write operations can be minimized, and the impact on the disk can be reduced to the greatest extent. Impact on disk life.

Description

technical field [0001] The invention relates to a computer data protection method, in particular to a method for using a hard disk protection card to protect and restore hard disk data. Background technique [0002] With the development of my country's information industry, security issues are becoming more and more prominent, especially the rampant virus makes data protection more important. At present, there are pure software methods for hard disk data protection, and some are realized by adding hardware and software. Yes, relatively speaking, the hardware method is more reliable and safe than the pure software method, and can protect the data to the greatest extent. Among them, the hard disk protection card is a relatively important method. The hard disk protection card uses a certain algorithm to intercept and modify the system. The manipulation of data to achieve the purpose of data protection. [0003] The basic principle of the immediate recovery type hard disk protect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/14G06F12/00
Inventor 刘文斌
Owner EASYSAFECHINACO