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Current failure data protection method of flash memory medium

A data protection and media technology, applied in the protection of storage content to prevent loss, redundancy in operation for data error detection, response error generation, etc., can solve the loss of original data, poor computer contact, write data failure, etc.

Active Publication Date: 2009-05-27
NETAK TECH KO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If the flash medium is powered off when writing data, the writing data will fail and the original data will be lost at the same time.
However, the power failure phenomenon may occur frequently due to various reasons in the current power consumption environment, such as poor contact between the USB interface of the flash memory medium and the computer, power failure of the computer's main power supply, etc.

Method used

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  • Current failure data protection method of flash memory medium
  • Current failure data protection method of flash memory medium
  • Current failure data protection method of flash memory medium

Examples

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Embodiment Construction

[0018] refer to figure 1 , shows a schematic flowchart of the first embodiment of the present invention. In the prior art, the flash memory medium is stored with a logical comparison table, which records the correspondence between the physical address of the physical block of the flash memory medium and the logical address of the logical block, and the stored data can be found through the logical address of the logical block of the flash memory medium. The physical address of the physical block. After the flash medium receives the command to write data, it finds the physical address according to the logical address. In this embodiment, an exchange block for writing data is also provided. Table 1 shows the correspondence between logical addresses and physical addresses in this embodiment. The logical address 0 of the logical 0 block corresponds to the physical address 0 of the physical 0 block, the logical address 2 of the logical 2 block corresponds to the physical address ...

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Abstract

The invention provides a power-off data protection method for a flash memory medium. The method comprises the following steps: data is written into a physical block of the flash memory medium; the corresponding relation between a logical block and the physical block of the flash memory medium is modified to form a new logical comparison table; and a safety sign is set in the new logical comparison table. The power-off data protection method for the flash memory medium ensures that at least one of newly written data and original data exists in case of power-off.

Description

technical field [0001] The invention relates to the field of static memory, in particular to a method for protecting flash memory medium power-off data. Background technique [0002] Flash memory (Flash) media has been widely used in people's lives. The storage space of existing flash memory media is divided into multiple physical blocks. There are several pages in a block, which are written in units of pages and erased in units of blocks. . [0003] If the flash medium is powered off when writing data, the data writing will fail and the original data will be lost. The power failure phenomenon may occur frequently due to various reasons in the current power consumption environment, such as poor contact between the USB interface of the flash memory medium and the computer, and the total power supply of the computer is cut off. How to improve the stability of flash media and improve the problem of data loss when the flash media is powered off has always been a major problem ...

Claims

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Application Information

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IPC IPC(8): G06F12/16G06F11/14
Inventor 钟智渊
Owner NETAK TECH KO LTD
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