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Processing method of rapid memory file

A processing method and memory technology, applied in memory systems, electrical digital data processing, instruments, etc., can solve problems such as Flash write corruption and data loss, and achieve the effect of reducing time consumption and Flash damage.

Inactive Publication Date: 2003-03-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of file system may cause Flash to be damaged when encountering modification and writing (assuming that the user writes byte by byte)
If the data written by the user is temporarily stored in the memory, it may lead to data loss

Method used

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  • Processing method of rapid memory file
  • Processing method of rapid memory file
  • Processing method of rapid memory file

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The preferred embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] We provide a fast storage file processing method, which mainly includes: establishing a file allocation table to realize file organization and operation access.

[0037] Considering the access characteristics of flash, if the file allocation table is placed in a continuous position, the file allocation table is modified due to the change of file attributes, resulting in frequent erasure of the file allocation table area; it may cause damage to the area where the file allocation table is located. In order to avoid possible damage to the Flash caused by continuous storage of the file allocation table, it is considered to store the file allocation table scattered throughout the system. The specific method is:

[0038] The minimum area allocated each time in the FLASH file system is Flash_Min KBytes (the default is 1K).

[00...

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Abstract

There is a processing method of flash memory files which mainly includes: setting up the file distribution list which distributes it to everywhere in the Flash file system in order to store it; adopting the chain-list form to organize the files; and the mode of operating and accessing thef lies, including adopting the first backing-up, then erasing operation, as well as adopting the log and the first back-up, erasing operation. Utilizing the method, the users can save multiple version's system programs as well as multiple configuration files. The method adequately considers the character thatthe times of the Flash eraser is finite, and assures the coherence of the data when the system abnormally restarts.

Description

field of invention [0001] The invention relates to a processing method of a flash memory (Flash) file, in particular to a processing method of a Flash file applied in a data communication product. Background technique [0002] The function of the Flash file system is to realize reliable management of data in Flash and provide a file-based access interface. As a storage device, Flash has high read operation capability and can be directly accessed according to the access mode of memory. But there are very strict restrictions on the write operation - each bit can only be modified from 1 to 0, but not from 0 to 1. If you want the Bit to change from 0 to 1, the only way is to perform an erase operation. The size of the smallest area that can be erased by different Flash is different, and the size of the erasable block in different areas on the same Flash is also different. Fortunately, several relatively small erasable blocks in Flash are exactly the size of a large erasable b...

Claims

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Application Information

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IPC IPC(8): G06F12/00G06F12/02
Inventor 陈杰李莉范志强
Owner HUAWEI TECH CO LTD
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