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Flash memory device and management method thereof

A flash memory storage and management method technology, applied in the field of flash memory storage devices and their management, can solve the problems of easy data loss and data stability, and achieve the effect of improving data stability

Active Publication Date: 2014-07-09
SHENZHEN NETCOM ELECTRONICS CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, it is necessary to provide a data stability method that can improve the storage of effective data for the problem that the data on the data page behind the physical block that is not full of data in the traditional flash memory storage device is easily lost or has low data stability due to errors. Management method of permanent flash memory storage device

Method used

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  • Flash memory device and management method thereof
  • Flash memory device and management method thereof
  • Flash memory device and management method thereof

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Embodiment Construction

[0032] The technical solution of the flash memory storage device and its management method will be described in detail below in conjunction with specific embodiments and accompanying drawings, so as to make it more clear.

[0033] Such as figure 1 As shown, in one embodiment, a management method of a flash memory storage device includes the following steps:

[0034] Step S110 , when the flash storage device is powered on, detect whether there is a physical block in the flash storage device that is not full of data, if yes, execute step S120 , if not, execute step S130 .

[0035] Step S120, fill the free pages after the last data page of the physical block that is not full of data with invalid data.

[0036] Specifically, the data page is a flash memory page with data written therein, and the free page is a flash memory page without data written therein. Invalid data refers to useless data, such as some data without specific meaning. Valid data refers to useful data written ...

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Abstract

The invention relates to a flash memory device and a management method thereof. The method includes the following steps: detecting whether a physical block not filled with data exists in the flash memory device when the flash memory device is electrified; conducting invalid data filling on idle pages behind a last data page of the physical block not filled with the data if the physical block not filled with the data exists in the flash memory device. Due to the fact that invalid data filling is conducted on the idle pages behind the last data page of the physical block not filled with the data when the fact that the physical block not filled with the data exists in the flash memory device is detected when the flash memory device is detected, even if the data in the physical block not filled with the data in the flash memory device are affected by high temperature, effective data are not affected due to the fact that invalid data pages in the physical not filled with the data are affected, and data stability of the effective data in the flash memory device is improved.

Description

technical field [0001] The invention relates to the field of flash memory, in particular to a flash memory storage device and a management method thereof. Background technique [0002] Portable storage devices such as USB flash drives and SD cards have become a necessity in people's daily life, and the stability of their stored data has attracted more and more attention. Most of the traditional portable storage devices use flash memory as the storage medium. [0003] The physical composition of flash memory is as follows: each package contains one or more Dies (die); each Die contains multiple Blocks (blocks); each block contains multiple Pages (pages). Writing (programming) to flash memory must take page as the unit, and erasing flash memory must take block as the unit. [0004] At present, after testing, it is found that the data stored in the flash memory storage device may be lost or damaged in a high-temperature environment, especially the data stored in the physical b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/06G06F12/16
Inventor 邓恩华
Owner SHENZHEN NETCOM ELECTRONICS CO LTD
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