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.

Inactive Publication Date: 2006-05-24
VIMICRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, this requires register space for storing file A; additional storage space is used to generate new sub-files, and essential file read and write operations are required

Method used

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  • File segmenting method and device for FAT file system
  • File segmenting method and device for FAT file system
  • File segmenting method and device for FAT file system

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Embodiment Construction

[0033] The method for file segmentation in the FAT file system proposed by the present invention is described as follows in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to illustrate the present invention, but not to limit the present invention. Those of ordinary skill in the relevant technical field can also make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all Equivalent technical solutions also belong to the category of the present invention, and the scope of patent protection of the present invention should be defined by each claim.

[0034] refer to Figure 4 , in the present embodiment, whole FAT file system is placed in an audio processing chip, and this audio processing chip comprises CPU and memory part, wherein the data transmission between CPU and memory adopts DMA (direct memory access) commonly used in the prior art )transfer method. Speci...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 孙丰强谭帅
Owner VIMICRO CORP
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