Non-Sequential Channel Distribution for SSD Overload
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Solution Overview
Problem
Conventional Solid State Drives (SSDs) experience performance reduction due to overload phenomena at specific channels during input/output operations, caused by sequential distribution of logical addresses to pages across channels.
Innovation Solution
Implementing a method for non-sequential channel distribution based on logical addresses, where a distribution unit outputs a channel address, allowing the read/write module to perform address mapping and manage data operations across multiple channels, thereby distributing data access more evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sequential channel distribution based on logical address is used, then address mapping is simple, but channel overload occurs reducing SSD performance
Solution Approach 1:
The patent changes the distribution pattern parameter from sequential to non-sequential based on logical address modulo channel count. This transforms the channel selection formula from simple increment to a modular arithmetic operation that distributes addresses more evenly across channels, resolving the overload issue while maintaining mapping simplicity
Solution Approach 2:
The patent introduces dynamic channel selection where the channel assignment changes based on the logical address value. Instead of fixed sequential assignment, the channel is dynamically determined by the formula channel = logical_address % channel_count, allowing flexible distribution that adapts to different address patterns and prevents channel concentration
2Productivity
If non-sequential channel distribution based on logical address is used, then channel overload is reduced improving performance, but address mapping complexity increases
Solution Approach 1:
The patent applies modular arithmetic (logical_address % channel_count) to transform the distribution pattern. This mathematical approach provides a systematic and computationally efficient method for non-sequential distribution that is simple to implement in hardware or firmware, minimizing the actual complexity increase
Solution Approach 2:
The patent segments the address space by using modulo operation to divide logical addresses into different channel groups. This segmentation approach naturally distributes the address range across multiple channels in a balanced way, making the complexity management more structured and predictable
Data Source
AI summary
The method of operating the data storage device includes performing channel distribution non-sequentially based on a logical address included in a data signal and outputting a channel address, and at least one of writing data to and reading stored data from a memory connected to one of a plurality of channels based on the channel address.