Flash Translation Layer Emulation System for SSD Firmware Verification
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Solution Overview
Problem
Current firmware verification environments for Solid State Disk (SSD) Flash Translation Layer (FTL) are costly and inefficient due to the need for expensive hardware components like NAND Flash, which are consumable and unstable, limiting development efficiency and increasing costs.
Innovation Solution
An emulation test system comprising a network block device, a virtual hardware accelerator, and a flash translation layer module, which simulates SSD operations using virtual flash memory to test and develop FTL algorithms, allowing for virtual hardware acceleration and efficient detection of abnormalities like null pointer access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If real hardware (NAND Flash, SSD controller) is used for FTL verification, then verification accuracy is improved, but development cost increases and development efficiency decreases
Solution Approach 1:
The patent creates a virtualized copy of the SSD hardware system including virtual NAND Flash, virtual SSD controller, and virtual PCIE interface. This virtual system replicates the behavior and interface protocols of real hardware, allowing FTL algorithms to be verified in a software environment that closely mimics production conditions without requiring physical hardware for each test iteration
Solution Approach 2:
The patent introduces a hardware emulation module that acts as an intermediary between the FTL algorithm under test and the virtualized hardware components. This emulator translates FTL operations into appropriate actions on the virtual system, enabling accurate verification while maintaining the ability to run purely in software
2Measurement precision
If real hardware (NAND Flash) is used for FTL verification, then verification accuracy is improved, but development cost increases
Solution Approach 1:
The patent creates a virtualized copy of the SSD hardware system including virtual NAND Flash, virtual SSD controller, and virtual PCIE interface. This virtual system replicates the behavior and interface protocols of real hardware, allowing FTL algorithms to be verified in a software environment that closely mimics production conditions without requiring physical hardware for each test iteration
Solution Approach 2:
The patent replaces expensive, limited-life physical NAND Flash with virtual flash memory that can be freely created, modified, and deleted. The virtual flash memory emulates the characteristics of real NAND Flash including page structures, block management, and wear leveling behavior, but without the cost and durability constraints of physical hardware
3Measurement precision
If real hardware (NAND Flash) is used for FTL verification, then verification accuracy is improved, but system stability worsens due to consumable nature
Solution Approach 1:
The patent creates a virtualized copy of the SSD hardware system including virtual NAND Flash, virtual SSD controller, and virtual PCIE interface. This virtual system replicates the behavior and interface protocols of real hardware, allowing FTL algorithms to be verified in a software environment that closely mimics production conditions without requiring physical hardware for each test iteration
Solution Approach 2:
The patent replaces expensive, limited-life physical NAND Flash with virtual flash memory that can be freely created, modified, and deleted. The virtual flash memory emulates the characteristics of real NAND Flash including page structures, block management, and wear leveling behavior, but without the cost and durability constraints of physical hardware
4Adaptability or versatility
If FTL software is designed to match hardware on embedded controller, then hardware compatibility is improved, but development flexibility worsens
Solution Approach 1:
The patent introduces a hardware emulation module that acts as an intermediary between the FTL algorithm under test and the virtualized hardware components. This emulator translates FTL operations into appropriate actions on the virtual system, enabling accurate verification while maintaining the ability to run purely in software
Solution Approach 2:
The patent creates a dynamic verification environment where the virtual hardware configuration can be changed without physical reconfiguration. The virtualized system allows developers to modify hardware parameters, interface protocols, and memory characteristics through software, enabling flexible exploration of different hardware configurations before finalizing the FTL implementation for production hardware
Data Source
AI summary
The present disclosure relates to an emulation test system for flash translation layer and a method thereof, the system comprising a network block device, a virtual hardware accelerator, a flash translation layer module, and a virtual flash memory based on the network block device, wherein the network block device is configured to receive and forward test information, the test information including a read instruction and/or a write instruction and data to be written; the virtual hardware accelerator is configured to allocate the test information to each thread of the virtual hardware accelerator and perform virtual hardware acceleration on the flash translation layer module; and the flash translation layer module is configured to operate the virtual flash memory based on the test information to obtain an operation result.