Solid-state drive cache achievement method and solid-state drive

A solid-state hard disk, the technology of the realization method, applied in the direction of instruments, electrical digital data processing, input/output to the record carrier, etc., can solve the problems of system blue screen, file system damage, user data damage, etc., to achieve fast read and write speed, cost cheap effect

CN107220001AInactive Publication Date: 2017-09-29RAMAXEL TECH SHENZHEN
4 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-09-29
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a solid-state drive cache achievement method and a solid-state drive. The solid-state drive cache achievement method is characterized in that an SCM is added in the solid-state drive, a hard drive controller regards the SCM as solid-state drive cache, a host writes host data into the solid-state drive, the SCM is firstly written to achieve data cache, a renewing program is set in the background, and the renewing program renews the cached data to a NAND storage unit of the solid-state drive, and recycles the corresponding cache; regarding the SCM, when the system is power off, data in the SCM can continue to be stored. The SCM replaces partial DRAM to be regarded as data cache, a read-write speed higher than flash memory can be provided, and the SCM is cheaper than the DRAM in cost. Data can be ceaselessly stored even under the state that a power source is lost, the operation at a byte level is supported, and the safety of the data can be guaranteed on the premise that the high data accessing speed is guaranteed.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to solid-state hard disk control technology, in particular to a solid-state hard disk cache realization method and the solid-state hard disk. Background technique

[0002] figure 1 It is a typical NAND composition diagram: DIE, a unit that can be operated independently and concurrently; Block, a unit that can be erased independently, and the data at each physical location in it must be erased before the next write; Page, read write unit.

[0003] SSD (Solid State Drive) has been widely used in various occasions, and it is gradually replacing traditional HDD storage devices. In order to obtain the maximum concurrent writing speed of NAND, it is necessary to maintain a cache of user data in the memory (DRAM), and initiate concurrent writing to NAND after sufficient data is cached, so as to obtain the highest performance. Since the memory is a volatile device after power failure, the SSD system designed based on this scheme will c...

Examples

Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0022] image 3 It is a schematic diagram of using SCM to implement caching. Adding SCM to the solid-state hard disk, the hard disk controller uses SCM as the solid-state hard disk cache, and when the host writes host data to the solid-state hard disk, that is, user data, it first writes to the SCM to realize data caching. The solid-state hard disk A certain amount of Memory is also reserved for running the SSD control program and other non-user data caches. An up...