Method and device for dynamically realizing ECC check codes of solid state drives

Abstract

The invention discloses a method and device for dynamically realizing ECC check codes of solid state drives. The method comprises the following steps: setting ECC check code rate units for a solid state drives storage system; presetting multiple stages of ECC check code rates for the solid state drives storage system; recording the ECC check code rate currently used by each ECC check code rate unit through an ECC check code rate table in a solid state drives controller; adopting the ECC check code rates with relatively short ECC code lengths in the early stage of the solid state drives life cycle; gradually using the ECC check code rates with longer ECC code lengths when the storage mediums become unreliable; and in the end stage of the solid state drives life cycle, using, by the ECC check code rate unit, the ECC check code rates with the longest ECC code length. According to the method and device, the solid state drives can obtain more user data storage spaces in the early stage of the solid state drives life cycle through dynamically controlling the ECC check code length under the premise of not losing the solid state drives reliability, so that the solid state drives write amplification is decreased, the solid state drives read-write efficiency is improved and the service life of the solid state drives is prolonged.

Description

technical field [0001] The invention relates to a method and a device for dynamically realizing an ECC check code of a solid-state hard disk. Background technique [0002] Due to its high performance, high reliability and many other advantages, solid-state drives have become the most popular storage devices at present, and their applications are becoming more and more extensive. The essential reason why solid-state drives have this advantage is that they use electrical signals as the physical form of information storage. However, the storage medium of electrical signals also has some inherent shortcomings. One of the big problems is that the reliability of electrical signals stored on the storage medium is not stable. Moreover, due to the development of the solid-state hard disk industry, there is an urgent need for large-scale commercial use of low-cost storage media, and more and more unstable storage media are used on solid-state hard disks. This situation causes the da...

AI Technical Summary

Problems solved by technology

However, if the code length of the ECC verification data is set too short, the error correction capability will be reduced and the life cycle of the SSD will be reduced; if the code length is set too long, more storage space will be wasted in the early life of the SSD, resulting in come with additional negative effects

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