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Method for improving random write performance of SSD

A random write and performance technology, applied in information storage, static memory, digital memory information, etc., can solve the problem of slow NandFlash write operation, improve the write speed, improve the random write speed of SSD, and promote the use value. Effect

Inactive Publication Date: 2010-03-10
LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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Problems solved by technology

[0005] Although the read and write speed of SSD is much faster than that of traditional hard disk, due to the structure of Nand Flash chip, Nand Flash chip will automatically perform the operation from page data register to internal storage unit when doing write operation. It is more than 200us, which is the main reason for the slow writing operation of Nand Flash

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  • Method for improving random write performance of SSD

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Embodiment

[0024] A method for improving SSD random write performance of the present invention includes a Nand Flash chip. In the NandFlash chip write control process and control circuit, the following measures are taken to greatly improve the SSD write speed:

[0025] (1) Parallel the original independent SSD storage medium Nand Flash chip, share the control logic of the Nand Flash chip, but use their own data lines;

[0026] (2) According to the working principle of the write operation of the Nand Flash chip, the write operation is divided into three steps: addressing, data writing and ECC detection, and a three-stage pipeline is formed;

[0027] (3) Add 2 page-sized Buffers of Nand Flash chips in the data writing stage of the pipeline as a buffer for writing data.

[0028] The number of parallel Nand Flash chips is 4, and they are controlled by the control logic of the same Nand Flash chip. Each Nand Flash chip has an 8-bit data line independently, forming a 32-bit data bus.

[0029]...

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Abstract

The invention discloses a method for improving random write performance of an SSD, which belongs to the field of hard disk write performance. In a write control flow and a control circuit of Nand Flash chips, the following measures are adopted to greatly improve the write speed of the SSD: (1) paralleling originally independent Nand Flash chips used as storage media of the SSD and sharing a control logic of the Nand Flash chips but using respective data lines; (2) dividing a write operation into three steps which include addressing, data write-in and ECC according to a working principle of thewrite operation of the Nand Flash chips and forming a three-stage stream line; and (3) adding two Buffers which are used as write-in data buffers with size same as a page size of the Nand Flash chipinto the write-in stage of stream line data. Compared with the prior art, the invention greatly improves the write speed of the SSD.

Description

technical field [0001] The invention relates to the field of hard disk writing performance, in particular to a method for improving random writing performance of SSD. Background technique [0002] SSD (Solid State Disk, Solid State Disk or Solid State Drive), also known as electronic hard disk or solid state electronic disk, is a hard disk composed of a control unit and a solid state storage unit (DRAM or FLASH chip). The interface specifications and definitions, functions, and usage methods of SSDs are the same as those of ordinary hard disks, and the product shape and size are also consistent with ordinary hard disks. [0003] Nand Flash chip is the main non-volatile flash memory technology on the market now. The structure of the Nand flash chip can provide extremely high cell density, can achieve high storage density, and the speed of writing and erasing is also very fast. [0004] Because its storage medium is Nand Flash chip, SSD (Solid State Drive) has similar advant...

Claims

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Application Information

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IPC IPC(8): G11C7/10
Inventor 于治楼李峰姜凯梁智豪
Owner LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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