Flash memory management method and flash memory medium

Abstract

The invention provides a flash memory management method and a flash memory medium. The flash memory management method comprises the following steps: searching an available physical sector in a sub-chip physical block, and binding the physical block into a virtual physical block. A sub-chip flash memory medium comprises the secondary physical block; the secondary physical block comprises a physicalsector; the physical sector comprises the available physical sector and / or an unavailable physical sector; the virtual physical block is formed by the available physical sector; the virtual physicalblock comprises a virtual physical sector and an available physical sector comparison table; and the available physical sector is mapped by the virtual physical sector through the available physical sector comparison table. The available physical sector in a sub-chip flash memory is bound into the virtual physical block, and then the bound virtual physical block forms the sub-chip flash memory bymapping so as to realize the fully utilize the available physical sector in the sub-chip flash memory, improve the utilization rate of the sub-chip flash memory and reduce the production cost of the flash memory medium.

Description

technical field [0001] The invention relates to the field of information storage, in particular to a flash memory management method and a flash memory medium using the management method. Background technique [0002] At present, the flash memory market is changing with each passing day, the changes in flash memory technology are emerging one after another, and the manufacturing process is becoming more and more sophisticated. However, due to improvements in the manufacturing process, production speeds have increased significantly, resulting in a large number of sub-chip flash memory. Theoretically, sub-chip flash memory should be scrapped, but due to various reasons, a large number of sub-chip flash memory has flowed into the market. Sub-chip flash memory means that there are both available blocks and unusable blocks in flash memory, so the support for sub-chip flash memory is more complicated. The existing sub-chip flash memory first screens each block to ensure that all g...

AI Technical Summary

Problems solved by technology

In theory, sub-chip flash memory should be scrapped, but due to various reasons, a large number of sub-chip flash memory has flowed into the market. Sub-chip flash memory means that there are both available blocks and unusable blocks in flash memory, so the support for sub-chip flash memory is more complicated

The existing sub-chip flash memory first screens each block to ensure that all good blocks are put into use, but the premise of judging a good block must be that each sector in the block is available, and the read and write of each sector in the block Must be correct, as long as there is a sector that is unavailable, the block where the sector is located will be screened out as an unavailable block, but the available physical sectors in this block can still be used, so there will be Blocks in available physical sectors are screened out as bad blocks, resulting in a lot of waste of flash memory

Images