Solid state disk and access control method thereof, and solid state disk controller

Abstract

The invention provides a solid state disk and an access control method thereof, and a solid state disk controller. The solid state disk controller comprises a host interface unit, a buffer unit, a storage interface unit and a compression / decompression unit, wherein the host interface unit is connected to a host, receives data from the host and sends data to the host; the buffer unit is connected to the host interface unit, and provides buffer for data transmission between the host interface unit and the compression / decompression unit; the compression / decompression unit is connected to the buffer unit, compresses data transmitted by the host to a storage unit, and decompresses data transmitted by the storage unit to the host; and one end of the storage interface unit is connected to the compression / decompression unit, while the other end is connected to the storage unit of the solid state disk for read-write operation on the storage unit. The effective capacity of the solid state disk is increased under the condition that the physical capacity of the solid state disk is fixed.

Description

technical field [0001] The invention relates to a data storage device solid-state hard disk, in particular to a solid-state hard disk, its access control method and a solid-state hard disk controller. Background technique [0002] As a basic storage device, a hard disk drive (Hard Disk Driver, HDD) is widely used in the field of electronic communication. Traditional HDD hard disks use magnetic media for data storage, and data is stored on a number of disks sealed in the inner cavity of a clean hard disk drive, and read and write data through magnetic heads. Because the read-write head is a mechanical structure, traditional HDD hard disks have inherent defects in access speed, anti-vibration, heat generation, power consumption, and noise. With the rapid development of CPU multi-core technology and virtualization applications, the bottleneck of the disk I / O subsystem is becoming more and more obvious. Traditional hard disks cannot and cannot keep up with the development of mi...

AI Technical Summary

Problems solved by technology

Because, due to various reasons such as chip technology, the unit storage cost of SSD is still far higher than that of traditional HDD, and the capacity of a single SSD is also limited.

In order to reduce the cost and expand its storage capacity, the existing technology adopts the method of increasing the physical capacity of SSD. This method is relatively intuitive and easy to think of, but its effect is obviously limited by the development level of chip technology and other technologies.

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