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Regional information table management method based on host memory space

A technology of memory space and area information, applied in memory address/allocation/relocation, memory system, electrical digital data processing, etc., can solve the problems of SSD cache space increase, power consumption and cost increase, multiple cache space, etc. Achieve the effect of saving wiring area and cost, reducing hardware cost, and expanding cache space

Pending Publication Date: 2021-03-26
SHANDONG SINOCHIP SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the SSD capacity increases to 8T and 16T, the SSD cache space will increase
This not only takes up more cache space, but also increases power consumption and cost

Method used

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  • Regional information table management method based on host memory space
  • Regional information table management method based on host memory space

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Embodiment 1

[0020] This embodiment discloses a method for managing a region information table based on a host memory space, including an overall design method for domain information state machine transfer maintenance and power-on / off management. The lba domain in ZNS SSD is the smallest unit of firmware management. Domain information includes domain state (state), write pointer (write pointer, WP), identification number (ID), and so on. These zone information need to be recorded and managed. The size of a zone is determined by the SSD manufacturer. If the entire solid-state drive is divided into N zones, the size of the domain information table is 16*N bytes.

[0021] Such as figure 1 As shown, this method first configures the HMB function of the SSD, the SSD applies for a memory unit from the Host, and designs a chip hardware logic unit so that the CPU of the SSD can directly store zone information in the Host memory unit. When the domain information data needs to be updated, the CPU ...

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PUM

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Abstract

The invention discloses a regional information table management method based on a host memory space, which expands the cache space of an SSD (Solid State Disk) by introducing a host memory use technology, saves the wiring area and cost of the SSD, and has obvious economic benefits. Besides, an overall operation and power-on and power-off maintenance method is provided according to the technical requirements to guarantee that design is feasible. Compared with a traditional domain namespace solid state disk, DDR usage can be obviously saved, hardware cost, the PCB area of the disk and power consumption of the whole disk are reduced, reliability of the power-on and power-off process is guaranteed, and a feasible method is provided for engineering practice.

Description

technical field [0001] The invention relates to a method for managing SSD region information, in particular to a method for managing a region information table based on a host memory space. Background technique [0002] The storage component of the solid-state drive (SSD) uses Nand Flash. As the number of stacked layers of Nand flash and the number of bits that can be represented by a single cell increase, the lifespan will continue to decrease. The order of user data storage in traditional SSD products is likely to be random, and the user data in the physical storage block (block) will be invalid after long-term operation. In order to reclaim physical blocks for new data, a garbage collection strategy needs to be introduced. However, the data movement during the garbage collection process will cause user data write amplification, increase the number of erasing and writing of nand particles, and naturally reduce the service life. In order to optimize the repeated garbage c...

Claims

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Application Information

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IPC IPC(8): G06F9/50G06F12/02
CPCG06F9/5016G06F9/5022G06F12/0253
Inventor 吴斌王璞刘凯孙大朋
Owner SHANDONG SINOCHIP SEMICON
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