Write operation control method and write operation device for solid state disk

Abstract

An embodiment of the invention provides a write operation control method and a write operation device for a solid state disk. The solid state hard disk comprises a first storage unit and a second storage unit. The first storage unit and the second storage unit are both nonvolatile storage devices. The method includes: writing data into the first storage unit; writing the data in the first storage unit into the second storage unit. According to the write operation control method and the write operation device for the solid state disk, the data is first written into the first storage unit which is the nonvolatile storage device to be cached, then the cache data stored in the first storage unit is written into the second storage unit which is the nonvolatile storage device to be stored permanently instantly or at intervals, and therefore even under the condition of unsafe shutdown, the cache data which is in the first storage unit and is not written into the second storage unit to be stored permanently can not be lost, and data loss rate of the solid state disk is reduced.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a write operation control method and a write operation device of a solid-state hard disk. Background technique [0002] Solid-State Drive (SSD) SSD is a new type of memory smaller and lighter than hard disk drive (Hard Disk Drive, HDD). SSD is widely used in computer field. SSD is sometimes referred to as an electronic disk for short. It is a data storage device that uses solid-state memory to store data that needs to be stored for a long time and provides the same IO access method as a traditional hard disk. Traditional SSD is composed of NAND Flash, DRAM and SSD controller, such as figure 1 As shown, the data writing operation of the traditional SSD in the prior art follows the following steps: first, the SSD controller writes the data into the DRAM for caching, and then writes the cached data in the DRAM into the NAND Flash for permanent storage. [0003] Most enterprise S...

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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a write operation control method and a write operation device of a solid-state hard disk with an extremely low data loss rate during non-safe shutdown, so as to overcome the defect of data loss caused by power failure in the prior art

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