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Safety management method and device of file system

A security management and file system technology, applied in the field of security management of file systems in mobile storage devices, can solve the problem of mismatching physical characteristics of flash memory, and achieve the effect of power failure protection

Active Publication Date: 2010-03-24
LEADCORE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is to provide a file system security management method and device to solve the problem in the current technical solution that the physical characteristics of the sector-based file system and the block-based flash memory do not match

Method used

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  • Safety management method and device of file system
  • Safety management method and device of file system

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Embodiment Construction

[0050] The core of the present invention is to store the master boot record, file allocation table, root directory and user data in a floating position storage mode according to the physical characteristics of the flash memory Flash itself. The core of the floating location storage method is to add a layer of Flash Translation Layer (FTL, Flash Translation Layer) between the file allocation table system (FAT, File Allocation Table) and the driver. That is, the FAT file system operates on logical sectors, while the driver operates on absolute physical addresses, and the two are converted at the FTL layer. Solve the problem that the file system in units of sectors (512 bytes) does not match the physical characteristics of flash memory in units of blocks (generally a multiple of 512 bytes).

[0051] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the accompanying drawings.

[0052] se...

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Abstract

The present invention relates to a safety management method of file system and its device. The described method includes the following steps: A, dividing initialized flash memory into several logicalsectors, and noting state of every logical sector; B, in the flash memory interior creating mapping table of logic sector and physical sector; and C, when the data are written into logic sector, searching or modifying mapping table and making recovery management of abnormal condition. The described device includes the following several portions: division unit, creation unit and recovery managementunit.

Description

technical field [0001] The invention relates to file system security management, in particular to a file system security management method and device in a mobile storage device. Background technique [0002] With the development of society, mobile phones have more and more functions, and their storage capacity is also increasing. Users can regard mobile phones as a multi-functional portable information processing device, which not only has functions such as telephone calls and text messages, but also As mobile storage information, therefore, there is a need to use mobile phones as mobile storage devices. In addition, since the vast majority of PCs use the file allocation table system (FAT, File Allocation Table), most existing mobile phones also use the FAT file system to adapt to it. However, the characteristics of the storage medium Flash and the shortcomings of the FAT file system still exist on the mobile phone at present, so that the FAT file system on the mobile phone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30G06F12/00
Inventor 巍骛孟卫国王世卓
Owner LEADCORE TECH
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