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File system

A file system and file technology, applied in memory systems, instruments, electrical digital data processing, etc., can solve problems such as unavailability and flash memory unavailability, achieve light processing load, and prevent file inconsistency or file loss.

Inactive Publication Date: 2009-09-09
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The specific reason is as follows: If the same file system approach as that of magnetic storage is used for flash memory, a given block alone undergoes frequent updates, so that the block becomes unavailable, as a result, the entire flash memory becomes unavailable

Method used

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Embodiment Construction

[0069] A description will be given below regarding the file system of the flash memory according to the embodiment of the present invention with reference to the accompanying drawings. figure 1 is a functional block diagram showing a configuration example of an electronic device shown as an example of a device to which the file system according to the first embodiment of the present invention is applied. Such as figure 1 As shown, the electronic device A according to the first embodiment of the present invention includes: a control unit (CPU) 1 that performs all control; a non-volatile flash memory 3 that stores programs; a data file for controlling the device, etc.; a volatile memory 5 such as RAM; a data input / output device 15 through which data is input and output; an input device 7 through which a user inputs data; and a display device 11 which displays information based on a result output by processing the input data.

[0070] The file system of the above electronic de...

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Abstract

File configuration information is not stored in a specific region of a flash memory. Block information composed of a file ID and block connection information is added to each block with file data, and the file configuration information is reconfigured based on the block information at the time of performing mount processing of the flash memory.

Description

technical field [0001] The present application relates to file system technology, and more specifically, to the file system technology of NAND flash memory. Background technique [0002] Recently, development of information equipment has led to attention of flash memory as an information recording medium of the information equipment. The reason for this is that the miniaturization of the flash memory is achieved, and the reliability of the flash memory is increased because the drive unit is not required. In particular, NAND-type flash memory, which is easy to achieve a large capacity, is rapidly spreading as an information recording medium. NAND type flash memory is a kind of flash memory, and has the characteristic of being able to write and write at a high speed. [0003] Typically, writing data to flash memory requires erasing prior to writing. The NAND-type flash memory includes a plurality of blocks, and each block includes a plurality of pages. Erasing is done bloc...

Claims

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Application Information

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IPC IPC(8): G06F12/00
Inventor 福本圭司
Owner SHARP KK
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