Flash Memory Address Translation with 2-Stage Wear-Leveling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flash memory devices face limitations in lifespan due to varying address translation methods, leading to differences in performance, stability, and lifespan among devices, and they require efficient wear-leveling to extend their life-span.
Innovation Solution
A 2-stage address translation system is implemented, including a virtual driver that translates logical addresses to physical addresses and manages mapping information to ensure efficient data allocation and wear-leveling across multiple flash memory devices, enhancing performance, stability, and lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different address translation methods are used by various flash memory devices, then device functionality is maintained, but performance, stability, and lifespan vary significantly among devices
Solution Approach 1:
The patent introduces a standard logical address space as an intermediary layer between the host and flash memory devices. This standard logical address space acts as a mediator that translates diverse physical address spaces into a unified interface, allowing different flash memory devices with various address translation methods to be used consistently without affecting performance or stability.
Solution Approach 2:
The patent creates a universal address translation framework where the standard logical address space can interface with multiple types of flash memory devices simultaneously. This universal interface allows the system to work with different devices while maintaining consistent performance characteristics, effectively making the system multi-functional across device types.
2Duration of action of stationary object
If wear-leveling operations are performed to extend flash memory lifespan, then device longevity is improved, but additional complexity is introduced in address translation management
Solution Approach 1:
The patent implements wear-leveling functionality that operates automatically through the standard logical address space without requiring external intervention. The system self-manages the distribution of write operations across physical blocks, extending flash memory lifespan while keeping the complexity hidden within the standardized interface rather than exposing it to users or higher-level software.
3Quantity of substance
If multiple flash memory devices are used simultaneously, then storage capacity is increased, but differences in address translation methods cause performance inconsistency
Solution Approach 1:
The standard logical address space serves as a mediator that abstracts away the differences in physical address spaces of multiple flash memory devices. By translating all device-specific address schemes into this unified standard interface, the system can simultaneously utilize multiple devices with different characteristics while maintaining consistent performance across all of them.
Data Source
AI summary
Disclosed are a system and a method for address translation for a flash memory device, and particularly, disclosed is a technology that is capable of efficiently performing address translation between a logical address provided to the outside of a flash memory and a physical address of an actual flash memory in managing the flash memory device. The system includes: a flash memory system writing a corresponding data page by allocating a physical address space when there is a request for writing a data page from storage clients, and performing address translation between a physical address and a logical address; and a logical address space formed between the flash memory system and the storage client to provide the logical address.