RAIN Error Recovery Timing in NAND Read Error Handling
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Solution Overview
Problem
Conventional memory systems face significant latency and resource consumption during read error storms due to the delayed use of RAIN-based error recovery techniques, which are typically reserved as the final stage in read error handling processes, leading to performance degradation and command timeouts.
Innovation Solution
Implementing a RAIN-based error recovery technique earlier in the read error handling process, allowing it to be triggered at an alternative stage based on system parameters, balancing thoroughness with rapid data access and mitigating performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If RAIN-based error recovery technique is reserved as the final stage in read error handling process, then resource consumption is reduced for normal operations, but latency increases significantly during read error storms
Solution Approach 1:
The patent dynamically adjusts the error recovery stage selection based on system parameters and error patterns. Instead of a fixed final-stage-only approach, the system can transition to early RAIN-based recovery when error storms are detected, optimizing the balance between resource consumption and latency based on real-time conditions
Solution Approach 2:
The system changes operational parameters by selecting different error recovery stages based on detected error patterns and system state. When read error storms are detected, the parameter changes from using only final stage recovery to enabling early stage RAIN-based recovery, thereby adjusting the trade-off between resource usage and response time
2Loss of time
If RAIN-based error recovery technique is used early in read error handling process, then latency is reduced during read error storms, but resource consumption increases
Solution Approach 1:
The patent implements preliminary detection mechanisms that monitor for read error patterns before they escalate into full error storms. By detecting early signs of errors and proactively engaging RAIN-based recovery at appropriate stages, the system prevents latency accumulation while avoiding unnecessary resource consumption during normal operations
Solution Approach 2:
The system uses feedback from error detection mechanisms to dynamically control when early RAIN-based recovery is activated. The feedback loop monitors error patterns, system state, and recovery effectiveness, adjusting the timing and intensity of RAIN-based recovery operations to minimize both latency and resource consumption based on actual performance
3Loss of energy
If conventional read error handling process is used during read error storms, then resource consumption is minimized, but performance degradation and command timeouts occur
Solution Approach 1:
The patent implements dynamic adaptation of the error handling strategy based on detected error storm conditions. When performance degradation is detected through monitoring error rates and recovery success, the system dynamically transitions from conventional final-stage-only recovery to early RAIN-based recovery, maintaining productivity while managing resource consumption
Solution Approach 2:
The system takes preliminary anti-action by detecting error storm patterns before they cause severe performance degradation and command timeouts. By anticipating the need for enhanced recovery capabilities and preparing early RAIN-based recovery mechanisms, the system prevents performance collapse while avoiding the need for excessive resource consumption
Data Source
AI summary
Various example embodiments provide for early use of a redundant array of independent NAND-type memory devices-based (RAIN-based) error recovery technique in a read error handling (REH) process of a memory system to recover stored data. For some example embodiments, the RAIN-based error recovery technique is configured to determine, based on a system parameter, if and when the RAIN-based error recovery technique should be performed (e.g., triggered) at an alternative stage (e.g., at another position in the sequence) that is earlier than its current stage.