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Method and device for reducing write amplification of solid state disk

A solid-state drive and write amplification technology, which is applied in the direction of memory address/allocation/relocation, etc., can solve problems such as long comparison time and impact on transmission bandwidth

Active Publication Date: 2010-06-02
HUAWEI TECH CO LTD
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Problems solved by technology

[0006] It can be seen that in the prior art, the judgment of the data block needs to completely read the corresponding data block in the Flash, and use the storage space outside the Flash to judge the change from "0" to "1" bit by bit. Such a comparison time Long and will affect the transmission bandwidth of Flash

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  • Method and device for reducing write amplification of solid state disk
  • Method and device for reducing write amplification of solid state disk
  • Method and device for reducing write amplification of solid state disk

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Embodiment Construction

[0025] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the drawings and implementations.

[0026] The method and device for reducing the write amplification of the solid-state hard disk provided by the embodiments of the present invention aim at the write amplification problem in the SSD, and provide a mechanism for judging the consistency between the data block written by the host and the existing data block on the disk . Through the judgment of this mechanism, some write operations of the host can be converted into modifications of the mapping relationship between LBA and PBA, without the need to perform actual write operations to Flash, thereby reducing write amplification of SSDs and improving SSD life and performance .

[0027] Such as figure 1 As shown, it is a flowchart of a method for reduci...

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Abstract

The embodiment of the invention relates to the solid state disk (SSD) technology and discloses a method and device for reducing the write amplification of a SSD. The method comprises the following steps: when a new data block is needed to be written in the SSD, checking whether a data block which is the same as the new data block exists in the SSD; if so, establishing relationships between the logical block address of the new data block and the physical block address of the existing data block; and if not, writing the new data block in the SSD. The embodiment of the invention can be used to reduce the write amplification of the SSD and increase the service life and performance of the SSD.

Description

technical field [0001] The invention relates to solid-state hard disk technology, in particular to a method and device for reducing writing amplification of a solid-state hard disk. Background technique [0002] Nand Flash is a non-volatile storage medium with high cell density, high storage density, and fast writing and erasing speed. [0003] At present, mainstream solid-state drives all use Nand Flash chips as the storage medium, which is commonly referred to as SSD (Solid State Disk, solid-state drive). Reading and writing are carried out in the way of writing and erasing, so the efficiency of reading and writing is very dependent on the design of reading and writing technology. Compared with the current traditional hard disk, it has the advantages of stability, thinness, fast access speed, and low heat generation. [0004] Since Flash has the characteristics of limited erasing times and erasing first, then writing, it will bring the defect of limited service life. Wr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/02
Inventor 杨继涛张琴柯乔李欣
Owner HUAWEI TECH CO LTD
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