Priority-locking-based flash memory storage method

Abstract

The invention discloses a flash memory storage method, which comprises the following steps of receiving data to be stored; determining the number L of storage blocks required by the storage of the data to be stored; finding the last storage block for storing the data in a first storage unit, and judging whether the L continuous storage blocks after the last storage block for storing the data comprise locked storage blocks or not; if the L continuous storage blocks after the last storage block for storing the data comprise the locked storage blocks, continuing judging whether the data to be stored is marked to be high-priority data or not, and performing different operation according to judgment results; and if the L continuous storage blocks after the last storage block for storing the data do not comprise the locked storage blocks, storing the data to be stored into the L continuous storage blocks after the last storage block for storing the data in the first storage unit.

Description

technical field [0001] The invention relates to the field of data storage, in particular to a flash memory storage method based on priority locking. Background technique [0002] When data is transmitted between the server equipment and the terminal equipment or between the internal devices of the computer equipment, it is especially necessary to use the storage equipment as a buffer equipment. At present, the more common storage devices are flash memory and electrically erasable programmable read-only memory (EEPROM). These two storage devices have the following advantages and disadvantages respectively: [0003] First of all, the advantages of flash memory are large capacity and low price; the disadvantage is that the erasing and writing speed is slow, and it must be erased first and then written. The minimum unit of each erasing is a BANK, that is, 64KB. Moreover, the number of rewritable times per unit storage space is small, about 100,000 times; [0004] Secondly, the...

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Problems solved by technology

[0006] However, if you use flash memory to store user data in consideration of cost, there will be the following problems: flash memory erase and write speed is slow, and most flash memory must use BANK (64KB) as the minimum erasing unit, and it takes more than 100ms to erase once. Too many times will inevitably affect the service life of the flash memory storage device, and when storing data, the speed is also slow

[0007] On the other hand, since the storage blocks in the storage unit in the flash memory will be locked according to the priority of the stored data, if they are not stored separately according to the priority of the stored data, some data will be locked. desired erasure

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