A wear leveling processing method based on super block for solid state hard disk SSD dual zone

Abstract

The invention discloses a solid state hard disk SSD wear leveling processing method based on a super block structure. Under the super block structure of the solid state hard disk, the method divides the whole system into two blocks (A, B), and separates the two blocks into two blocks (A, B). The super block (D) of the super block (D) is arranged in cold and hot dislocation, and the method of dislocation recovery (C) is adopted during garbage collection, and the hot data of the super block is recycled into the cold data block (400) of another area according to the dislocation rule, and the cold data is reclaimed Reclaiming the hot data blocks (300) in another area, the method implements wear leveling processing without consuming additional read and write operations while garbage is being collected. On the basis of dual-area wear leveling, the present invention is also compatible with a method for using spare blocks (700) to deal with excessive valid data during garbage collection. In general, the present invention reduces additional flash memory reading and writing overhead, thereby achieving the effect of improving performance and prolonging service life.

Description

technical field [0001] The invention relates to a superblock-based solid-state disk SSD dual-area wear leveling processing method, which belongs to the fields of electronic information and integrated circuit design. Background technique [0002] In 1967, Bell Labs' Korean scientist Jiang Dayuan and Chinese scientist Shi Min invented the floating gate transistor (Floating Gate Transistor), which laid the foundation for solid-state drive SSD technology. Compared with MOSFETs, floating gate transistors have more floating gates, that is, floating gate layers. This layer is wrapped with high-impedance materials and insulated from top to bottom, so that it can store charges and ensure that SSD data is not volatile. From the perspective of technical parameters, solid-state disk SSD has advantages such as good performance, low power consumption, and good shock and drop resistance compared with mechanical hard disk HDD, while HDD currently has a price advantage. However, with the rep...

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Problems solved by technology

[0015] In order to solve the phenomenon that under the existing super block architecture, the effect of the traditional wear leveling method is not obvious, and the resulting reading and writing amplification is too large and seriously affects the performance, the present invention provides a dual-zone solid-state hard disk SSD based on a super block wear leveling method

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