Partitioned Memory Error Correction via Snapshot Copyback
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Solution Overview
Problem
In memory sub-systems, especially in autonomous vehicles and IoT devices, there is a significant gap between total bytes written and user capacity, leading to high error rates during data transfer from one memory portion to another without external controller intervention, resulting in data corruption.
Innovation Solution
A memory sub-system with an error correction component that performs error correction operations on a sample of data within the memory and then performs a copyback operation to move corrected data from a buffer memory portion to a snapshot memory portion, reducing errors and energy consumption by minimizing external controller involvement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If data is transferred from one memory portion to another without external controller intervention, then energy consumption is reduced and transfer speed is improved, but error rate increases and data corruption occurs
Solution Approach 1:
The memory sub-system performs error correction operations autonomously without requiring external controller intervention. The error correction component is integrated within the memory sub-system itself, allowing it to detect and correct errors during internal data transfers between memory portions, thus maintaining reliability while keeping the system self-sufficient and energy-efficient
Solution Approach 2:
The memory sub-system is divided into multiple memory portions (first memory portion and second memory portion) with an error correction component that operates independently on data during transfer. This segmentation allows error correction to be performed on specific data portions without involving the entire memory system or external controllers, reducing overall energy consumption while maintaining data integrity
2Reliability
If error correction operations are performed on all data during transfer, then data reliability is improved, but energy consumption increases and transfer time increases
Solution Approach 1:
Instead of performing error correction operations on all data during transfer, the system performs error correction on a sample of the data or uses error correction codes that operate selectively. This partial action approach maintains adequate data integrity while significantly reducing the energy consumption and transfer time overhead associated with comprehensive error correction
3Reliability
If external controller intervention is used for error correction, then data reliability is improved, but device complexity and energy consumption increase
Solution Approach 1:
The error correction functionality is extracted from the external controller and integrated directly into the memory sub-system. This extraction eliminates the need for complex external controller intervention while maintaining error detection and correction capabilities, thereby reducing overall system complexity and energy consumption without sacrificing data reliability
Data Source
AI summary
A memory component comprises a cyclic buffer partition portion and a snapshot partition portion. In response to receiving a signal that a trigger event has occurred, a processing device included in the memory component performs an error correction operation on a portion of data stored in the cyclic buffer partition portion, copies the data stored in the cyclic buffer partition portion to the snapshot partition portion in response to the error correction operation being successful, and sends the data stored in the cyclic buffer partition portion to a processing device operatively coupled to the memory component in response to the error correction operation not being successful.