Data storage method and device for solid state hard disk

Abstract

The present application discloses a data storage method and device for a solid-state hard disk. The data storage method includes: determining a first solid-state storage block where target data is located from an address mapping table in response to a data read command; The first solid-state storage block reads the target data and stores it in the first buffer area; reads the target data from the first solid-state storage block at a second reference voltage and stores it in the second buffer area, wherein the second reference voltage is different from the first reference voltage; calculate the voltage density between the first reference voltage and the second reference voltage according to the target data in the first buffer area and the target data in the second buffer area; determine whether the voltage density is greater than the preset density threshold; if greater, then Write the target data in the first cache area or the second cache area into the second solid-state storage block and update the address mapping table. The present application is more accurate in judging whether the target data needs to be rewritten, which can reduce the probability of misjudgment.

Description

technical field [0001] The present application relates to the technical field of data storage, and in particular, to a data storage method and device of a solid-state hard disk. Background technique [0002] With the rapid development of electronic product technology, consumers have higher and higher requirements for the experience of electronic products, and there is an increasing demand for faster and more convenient storage products. Among them, solid-state drives have become a very popular storage product due to their non-volatile data, power saving, small size, no mechanical structure, and fast read and write speed. A solid-state drive includes multiple solid-state storage blocks. When the target data stored in the same solid-state storage block is read multiple times, the read target data may be wrong, or even the target data may be lost. In this case, this phenomenon is called Read Disturb. In the prior art, a read error rate threshold is generally set. When the err...

AI Technical Summary

Problems solved by technology

However, due to the differences in the storage media of SSDs and the complexity of the working environment, if judgments are made only based on the error rate threshold, misjudgments may occur, resulting in too frequent rewriting of SSDs and increasing the wear rate of SSDs. , which in turn leads to a reduction in the service life of the SSD

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