Solid-State Memory Retry via Buffer Resubmission
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Solution Overview
Problem
In data storage devices, failed write operations to solid-state memory, such as flash devices, often require resubmitting entire user data blocks for reliability, leading to inefficiencies and delays, especially during power loss events where time is critical.
Innovation Solution
A data storage system with buffering capabilities that allows direct resubmission of failed flash blocks from stored buffers, minimizing the need for reprocessing and maintaining the programming pipeline, thus reducing overall programming time and overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If failed programming blocks are resubmitted to solid-state memory, then data reliability is improved, but data pipeline interruption and programming delays occur
Solution Approach 1:
The system performs preliminary actions by detecting programming failures early in the process and immediately implementing retry logic with dynamic parameter adjustment. The controller monitors programming operations in real-time and prepares alternative programming parameters before complete failure occurs, allowing for quicker recovery without full pipeline interruption.
Solution Approach 2:
The invention introduces dynamic adjustment of programming parameters (such as programming voltage, pulse width, or temperature) based on real-time feedback from failed programming attempts. This dynamic adaptation allows the system to optimize retry strategies on-the-fly, reducing the time lost during resubmission while maintaining data reliability.
2Reliability
If entire user data blocks are resubmitted for failed write operations, then data integrity is maintained, but processing efficiency and throughput decrease
Solution Approach 1:
The system segments the user data block into smaller units or pages, allowing selective resubmission of only the failed portions rather than the entire data block. This segmentation enables the successful portions to be committed immediately while only the failed segments undergo retry processing, thereby maintaining data integrity for successful writes while improving overall processing efficiency.
Solution Approach 2:
The invention extracts and isolates the specific failed programming blocks from the larger data set, allowing them to be processed separately through retry mechanisms while the rest of the data pipeline continues uninterrupted. This extraction approach prevents failure propagation and maintains high throughput for successful operations.
3Reliability
If programming operations are interrupted for retry, then failed data can be corrected, but power consumption increases during power loss events
Solution Approach 1:
The system applies partial action by performing only the minimum necessary retry operations to correct failed programming blocks, rather than reprocessing entire data blocks. This approach uses just enough power to achieve correction without excessive energy consumption, which is critical during power loss events where energy resources are limited.
Solution Approach 2:
The invention changes programming parameters dynamically during retry operations, adjusting voltage levels, pulse durations, or temperature based on the specific failure mode detected. This parameter optimization reduces the energy required for retry operations while maintaining the ability to correct failed data, addressing the power consumption concern during power loss events.
Data Source
AI summary
A data storage subsystem is disclosed that implements a solid-state data buffering scheme. Prior to completion of programming in solid-state storage media, data that is formatted for storage in solid-state media is maintained in one or more buffers. The system is able to retry failed programming operations directly from the buffers, rather than reprocessing the data. The relevant programming pipeline may therefore be preserved by skipping over a failed write operation and reprocessing the data at the end of the current pipeline processing cycle.