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Data storage method and device based on fat file system

A file system and data storage technology, applied in the computer field, can solve problems such as unfavorable implementation and complex implementation forms, and achieve the effect of simplifying the operation process

Active Publication Date: 2020-04-14
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This complex implementation form is not conducive to its logical realization

Method used

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  • Data storage method and device based on fat file system
  • Data storage method and device based on fat file system
  • Data storage method and device based on fat file system

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Embodiment Construction

[0030] In the following, the present invention will be specifically described through exemplary embodiments. It should be understood, however, that elements, structures and characteristics of one embodiment may be beneficially incorporated in other embodiments without further recitation.

[0031] In order to simplify the operation process of the FAT file system, the present invention re-customizes the original FAT file: a custom file allocation table (FAT table) partition: every 4 bytes is a unit in the FAT table, which is called a table item, and the entry is numbered from 0, each entry records the storage status of the cluster of the same number in the data area, and the cluster number of the next cluster occupied by the data file is filled in the entry ( The table entry corresponding to the last cluster of the data file does not need to fill in the cluster number of the next cluster occupied by the data file), so that each cluster occupied by the data file forms a cluster c...

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Abstract

The invention provides a data storage method and device based on an FAT file system. The method includes continuously storing the data file in a data area by taking the data block as a unit; wherein the storage states of clusters with the same numbers in the data area are recorded in each table item of the file distribution table; forming a cluster chain by using each cluster occupied by the data file; by the adoption of the partition storage mode, the situation that a file cluster chain starts to the interior of the FAT table sector is avoided, all reading operations on the FAT table during data file storage are omitted, updating of the FAT table can be simplified into two steps of continuous cluster chain generation and continuous sector writing, and the operation process of the FAT table is greatly simplified.

Description

technical field [0001] The invention belongs to the technical field of computers, and in particular relates to a data storage method and device based on a FAT file system. Background technique [0002] FAT file system is a file system form supported by Windows and other operating systems. In order to ensure that the data in the SD card can be directly read by the on-site monitoring host, it is necessary to mount the file system in the SD card so that the data in the SD card can be The form of the file is stored in the SD card. [0003] In the process of using the traditional file system, when creating a file, it is necessary to update the root directory to provide the basis for reading and writing files for subsequent access. When reading and writing each sector and cluster, the FAT1 table and FAT2 table must be updated. The corresponding sector and FSINFO sector in the table are repeatedly read and updated to determine the address of this read and write and update the next...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/06
CPCG06F3/0643
Inventor 周琳黄鹏翔李扬曹洪达于洪彬陈凯
Owner OCEAN UNIV OF CHINA