Solid state disk and access method

A solid-state hard disk and flash memory technology, applied in the field of memory and its access, can solve the problems of increasing the complexity of data reading and writing process, increasing the data structure, etc., to achieve simple and convenient reading and writing process, reduce the number of erasing operations, and low overhead Effect

Active Publication Date: 2012-09-12
INST OF COMPUTING TECH CHINESE ACAD OF SCI +1
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Problems solved by technology

However, in this application, the traditional mapping table structure needs to be extended to identify the storage location of the data in the flash memory, and the starting location and length of the data in th

Method used

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  • Solid state disk and access method

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] figure 1 A schematic structural diagram of a solid state disk according to an embodiment of the present invention is shown. Such as figure 1 As shown, the solid state disk includes a flash conversion layer and a flash memory (for example, NAND flash memory). The flash translation layer FTL mainly includes a compressor, a decompressor, a mapping table and the like. Among them, such as figure 1As shown in the shaded part of the slash, the compressor is used to compress the data sent by the file system and write it into the flash memory and save the information related to the c...

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Abstract

The invention provides a solid state disk which compresses data through a flash memory conversion layer and stores relevant information of compressed data in a back-up area of a flash memory physical page. The solid state disk can reduce data quantity written into and read from the flash memory solid disk of each time, reduces times of erasure operation caused by writing operation simultaneously, and prolongs service life. In addition, a read-write process of data is simple and convenient, a complex data structure is not added, a buffering area is not added either, a mapping table in a traditional flash memory conversion layer is not required to be modified, and cost of a data read-write process is guaranteed to be low.

Description

technical field [0001] The invention relates to the field of data storage, in particular to a memory and an access method thereof. Background technique [0002] Solid-state drives (SSDs) based on NAND flash memory (Flash Memory) have become storage solutions for many different applications ranging from consumer electronics to high-end enterprise systems. The reason is that compared with traditional hard disks, SSDs have the advantages of fast access speed, low power consumption, high reliability, good shock resistance, small size, and non-volatility. In addition, the price per byte of flash memory is gradually decreasing, which means that hard drives are likely to be replaced by SSDs in the near future. [0003] In order to package the flash memory chip into a solid state drive, it is necessary to add a flash translation layer (Flash Translation Layer, FTL) implemented by software or firmware between the file system and the flash memory chip in the SSD. The reason is that ...

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Application Information

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IPC IPC(8): G06F12/06G06F12/02
Inventor 隋秀峰李龙张立新
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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