File segmenting method and device for FAT file system

A file system and file segmentation technology, applied in special data processing applications, instruments, electrical digital data processing, etc., to save operation time and storage space.
CN1776687AInactive Publication Date: 2006-05-24VIMICRO CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
VIMICRO CORP
Publication Date
2006-05-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

Modifying cluster chain table of original files, the method creates new structure of sub file list item. Finally, deleting the cluster chain table of original files, the method completes operation for segmenting files. Without need of carrying out operation of reading / writing file, the method needs only to modify cluster chain to realize segmentation of files. Thus, the invention saves time for operating files and saves storage space of system.
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Description

technical field

[0001] The invention relates to the field of computer principles, in particular to a method for file division in a FAT file system and a device using the method. Background technique

[0002] The file storage principle of the FAT file system is that when a part of the disk space is formatted as a FAT file system, the FAT file system will plan this partition as an entire allocatable area to facilitate data storage.

[0003] FAT is a file system launched by Microsoft with high compatibility. It is still widely used in personal computers, especially mobile storage devices. FAT is simply composed of 5 parts, namely MBR, DBR, FAT, directory area, and data area. Among them, there is no reserved sector after the boot sector (DBR), followed by the FAT table. The FAT table is used to record the cluster chain structure of the disk data area. FAT divides the disk space into units of a certain number of sectors, and such units are called clusters. Normally, the princi...

Claims

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