Flash based PCIE (peripheral component interface express) board for data storage

Abstract

The invention discloses a Flash based PCIE (peripheral component interface express) board for data storage. The board is characterized in that an FPGA chip is used as the master control module, DDR memories are connected to serve as buffer modules and Flash chips are simultaneously connected to serve as storage modules; a PCIE controller, a DDR controller, a command parser, soft Cache hit logics,an X-Card management module, ECC check data logics, Flash block address mapping, an arbiter and a Flash controller are implemented inside FPGA and complete respective functions by downloading the programs to the FPGA. The communication interface adopts the PCIE interface which has high data transmission rate. PCI-E also supports advanced power management, hot plug and synchronous data transmission and optimizes the bandwidth for the preferentially transmitted data.

Description

technical field [0001] The invention mainly relates to a memory in the field of computer storage, in particular to a storage device based on Flash. Background technique [0002] With the continuous development of computer technology and integrated circuit technology, more and more processing cores are providing a steady stream of power for computer performance, but have long been plagued by access bottlenecks. The performance gap between processors and memory continues to widen, and memory has become the determining factor limiting system performance. At the same time, with the advancement of computer technology and the continuous expansion of the scale of problems in recent years, many applications are changing from computing-intensive to data-intensive, and data-intensive computing requires the support of high-bandwidth storage systems and I / O systems. Therefore, it is necessary to study deeply the storage system architecture satisfying high bandwidth and high data transf...

AI Technical Summary

Problems solved by technology

[0011] 3) Asymmetric read and write speed

At the same time, this device also has its obvious shortcomings: 1), the cost is too high: compared with a traditional SATA product with equivalent capacity of GB level, the price of SATA SSD is about 10 times higher; 2), the storage life is not long enough: NAND flash memory It can be erased and written up to 1000 times, which greatly limits its service life; 3), the performance of data reading and writing is very different: the reading speed of flash memory is almost twice the writing speed; 4), the irrecoverability of data damage: once If the hardware is damaged, if it is a traditional disk or tape storage method, some data may be saved through data recovery; but if the flash memory chip is damaged, if the chip is broken into several pieces or broken down by the current It's almost impossible to get the data back

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