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Solid state disk controller

A solid-state hard disk and controller technology, applied in the field of solid-state hard disk controllers, can solve problems such as flash memory bad blocks, and achieve the effects of improving processing speed, data transmission speed, and reading and writing efficiency.

Inactive Publication Date: 2009-08-05
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Also, flash memory may have bad blocks

Method used

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Embodiment Construction

[0026] figure 1 It is a schematic diagram of the structure of the solid-state hard disk of the present invention, and the working process of the solid-state hard disk is specifically: the queue controller 1041 obtains the command address queue 102 from the interface 101, sorts them according to the command address level, and separates the sorted command queue into read addresses according to the command type queue 1042 and write address queue 1044 . In the write operation, the queue controller 1041 calls the write flash translation layer (WFTL) 1045 to perform bad block management and wear balance processing on the write address queue 1044 to obtain the physical address queue of the write address queue, and the queue controller 1041 follows the write address queue 1044 sequentially The data in the data buffer 103 is obtained through the interface 101, and is extracted into the write data queue 1046 in units of the custom page 502, and the queue controller 1041 transmits the ph...

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Abstract

A solid hard disk controller belongs to the technical field of the hard disk storage. The hard disk controller comprises a command queue module and a flash memory parallel storage module. The command queue optimizing module acquires a command address queue and divides into a write address queue and a read address queue, extracts data from a hard disk buffer based on the address queue, and writes in the flash memory parallel storage module, reads data from the flash memory parallel storage module based on the read address queue and outputs to the hard disk buffer. The flash memory parallel storage module comprises more than one flash memory passages. A flash memory chip in the flash memory passage adopts the bite extending method. This invention separately processes the write operation and the read operation, and realizes the data parallel transmission via the flash memory parallel structure, thereby effectively improving the write / read efficiency of the solid hard disk.

Description

technical field [0001] The invention belongs to the technical field of hard disk storage, in particular to a solid-state hard disk controller. Background technique [0002] Solid State Disk (Solid State Disk), referred to as SSD, uses Flash (flash memory) chips as storage media, and consists of two parts: a control unit and a storage unit (Flash chip). The main function of the control unit is to read and write data, and the main function of the storage unit is to store data. Since solid-state hard disks do not have the mechanical structure of ordinary hard disks, semiconductor materials are used as storage media. Compared with conventional hard disks, solid-state hard disks have the advantages of low power consumption, no noise, vibration resistance, low heat, and fast transmission speed. [0003] Solid state drives use NAND flash memory as their storage medium. The basic operations of NAND flash memory are: read, program, erase. The basic unit of read and write operation...

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Application Information

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IPC IPC(8): G06F3/06G06F12/02
Inventor 周功业陈进才侯冰剑李涛卢萍
Owner HUAZHONG UNIV OF SCI & TECH
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