Solid state disk data storage method and device

Abstract

The invention provides a solid state disk data storage method, which comprises the following steps of: determining the relationship among the erasing times, the storage time and the bit error rate ofblocks of a hard disk according to a pre-test result; establishing a first information area and a second information area, the first information area recording the erasure frequency of the free blockand the calculated bit error rate after the preset storage time, and the second information area recording the erasure frequency and the stored time of the data block and the calculated bit error rateafter the preset storage time; determining a specific free block with the highest bit error rate after the preset storage time from the first information area, and determining a specific data block with the highest bit error rate after the preset storage time from the second information area; and when it is determined that the bit error rate of the specific free block is equal to the bit error rate of the specific data block after the preset storage time, migrating the data of the specific data block to the specific free block. The erasing times of each block of the solid state disk can be balanced.

Description

technical field [0001] The present invention relates to the field of computer technology, in particular to a method and device for storing solid-state hard disk data. Background technique [0002] Due to its high-speed read and write performance and low failure rate, solid-state drives are gradually replacing mechanical hard drives and becoming mainstream storage devices. Solid-state drives mainly use the Error Correcting Code (ECC) module to correct errors in stored data. As the use of solid-state drives increases, the error rate of stored data gradually increases. When the number of error bits exceeds the ECC correction When there is an error, an uncorrectable error will occur, and the solid-state drive cannot be used any longer. [0003] In order to prevent a small number of blocks from being frequently erased and written, quickly increase the bit error rate, and affect the overall life of the solid state drive, the Flash Translation Layer (FTL) technology was proposed. ...

AI Technical Summary

Problems solved by technology

However, the current FTL algorithm cannot handle data in cold blocks that are rarely erased and written in SSDs. If the FTL algorithm does not recycle cold blocks at all, then compared with hot blocks that are frequently Unbalanced wear between blocks will reduce the service life of solid-state drives; if the FTL algorithm treats hot blocks and cold blocks as equal blocks for recycling, frequent data transfer between hot and cold blocks will occur, reducing the solid-state drive’s lifespan. In addition to the I / O performance, it will also increase the loss of the hard disk

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