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Renewing method of document data

An update method and file data technology, which is applied in the direction of electrical digital data processing, instruments, memory systems, etc., can solve problems such as mixed old and new data, updated data that cannot be directly written, and incomplete new data.

Inactive Publication Date: 2006-01-11
MEDIATEK INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, updated data cannot be directly written into the physical block corresponding to the logical block
If a power failure occurs during the process of new data being written into the disk storage device 14 by the disk driver 13, traditionally, each physical block is erased and then written one by one, resulting in only partial updates. The data is written into the disk storage device 14, causing the old data of the file to be lost and the new data to be incomplete
exist Figure 1C In the shown second file update mode, if the new data is written into the disk storage device 14 by the disk driver 13 when the power is cut off, traditionally, the new data is first written in the blank physical block and After deleting the old data update method of the original physical block, it may lead to only a part of the data update, and the phenomenon of mixing old and new data occurs

Method used

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  • Renewing method of document data

Examples

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Embodiment Construction

[0049] Please refer to Figures 2 and 3 at the same time. figure 2 A block diagram of an electronic system according to a preferred embodiment of the present invention is shown, and Fig. 3 shows an application according to a preferred embodiment of the present invention figure 2 A flowchart of a method for updating file data in an electronic system of . Such as figure 2 As shown, the electronic system 20 includes a blank physical block obtaining module 21, a writing module 22, a first judging module 23, a first state setting module 24, a deleting module 27, and a second state setting module 28 And the second judging module 29, at least one file, at least one logical block, and at least one physical block. In the electronic system 20 , each logical block is mapped to a physical block, and the corresponding physical block is used to store data of the logical block. Each file includes at least one file logical block, and each file logical block is mapped to a first physical ...

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Abstract

The present invention relates to a file data updating method and its electronic system for updating data of a file. The file is existed in said electronic system, including at least a file logical block, every file logical block is correspondent to first entity block, and used for storing file logical block data. The file contains the data region to be updated, said data region is formed from at least an update logical block, the said update logical block can be correspondent to first entity block. Said invention also provides the concrete steps of said file data updating method.

Description

technical field [0001] The invention relates to a method for updating file data, and in particular to a method for updating file data for providing file-level power-off protection. Background technique [0002] Please refer to Figure 1A , which shows a schematic architecture diagram of a conventional sector-based electronic system. exist Figure 1A Among them, the electronic system 10 includes an application program 11 , a file allocation table (file allocation table, FAT) subsystem 12 , a disk driver 13 and a disk storage device 14 . When the electronic system 10 belongs to a mobile phone system, the disk storage device 14 is usually a flash memory. The characteristic of the flash memory is that when the electronic system 10 is required to write data into the flash memory, an erase operation must be performed first, and the size of an erase unit (erase unit) for one erase is, for example, 8Kbytes or 64Kbytes. The file allocation table subsystem 12 divides the storage spa...

Claims

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Application Information

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IPC IPC(8): G06F12/00
Inventor 殷伟盛
Owner MEDIATEK INC
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