Selective Underlying Exposure Storage Mapping for SSDs
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Solution Overview
Problem
Conventional information storage systems face challenges in achieving both high speed and manageable complexity, as physically addressed spaces operate fast but are complex to manage, while logically addressed spaces are less complex but slower, and existing solutions fail to adequately meet the requirements of modern applications and platforms.
Innovation Solution
The implementation of a selective underlying exposure (SUE) address space that maps user data into a combined logical and physical address space, allowing for efficient management and maintenance by exposing selective underlying aspects of the storage device, thereby facilitating faster and more manageable storage operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If physically addressed space is used for information storage, then storage speed is improved, but management and maintenance complexity increases
Solution Approach 1:
The patent segments the address space into two distinct types: physically addressed space for high-speed storage operations and logically addressed space for simplified management. This segmentation allows each address space type to optimize for its specific function, resolving the contradiction between speed and manageability.
Solution Approach 2:
The patent introduces an intermediary mapping mechanism that translates between logical addresses and physical addresses. This intermediary layer allows the system to present a simplified logical interface to users while maintaining the high-speed physical addressing underneath, effectively mediating between the two conflicting requirements.
2Device complexity
If logically addressed space is used for information storage, then management complexity is reduced, but storage speed decreases
Solution Approach 1:
The patent divides the storage system into two distinct address space segments: logically addressed space for ease of management and physically addressed space for high-speed operations. This segmentation enables each segment to fulfill its specific role without compromising the other.
Solution Approach 2:
The mapping mechanism serves as an intermediary that bridges the logical address space and physical address space. It translates logical addresses to physical addresses, enabling fast physical storage operations while maintaining the simplicity of logical addressing for users.
3Reliability
If conventional storage systems are used, then current performance requirements are met, but future application requirements cannot be satisfied
Solution Approach 1:
The patent implements a dynamic dual-address space system that can adapt to different operational requirements. The system can selectively use logical or physical addressing based on the specific task, enabling it to meet current performance needs while adapting to future requirements that may demand either speed or simplicity.
Solution Approach 2:
The storage system is designed with universal functionality by supporting both logical and physical addressing modes. This multi-functionality allows the same system to serve diverse application requirements, from speed-critical operations to management-simplified scenarios, ensuring both current and future adaptability.
Data Source
AI summary
An apparatus for mapping user data into a selective underlying exposure address (SUE) space includes a memory that stores machine instructions and a processor that executes the instructions to combine first user data from a plurality of logically-addressed blocks to create a SUE page. The SUE page corresponds to a respective physical page of a respective physical block on each of a plurality of dies for which corresponding physical blocks of memory cells are jointly managed as a unit in a storage device. The processor further executes the instructions to store mapping information associating the first user data with the SUE page in a logical address space in the storage device.