Memory Write Trim Switching for Reliable Media Management
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Solution Overview
Problem
Existing memory devices face reliability degradation due to increased program-erase cycles, leading to higher error rates and latency, with conventional reliability enhancement techniques compromising host performance.
Innovation Solution
Employing higher latency trim values during media management operations to improve reliability without affecting host write performance, using distinct sets of trim values for media management and host operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional reliability enhancement techniques are applied to memory devices, then reliability is improved, but host write performance deteriorates
Solution Approach 1:
The patent applies different trim values locally based on the operation type: high reliability trim values are used specifically for media management operations while default trim values are used for host write operations. This local differentiation allows reliability enhancement only where needed without compromising overall host performance.
Solution Approach 2:
The patent segments memory operations into two categories: media management operations and host write operations. By identifying and separating these operation types, the system can apply appropriate trim values to each segment, ensuring high reliability for media management while maintaining performance for host writes.
2Reliability
If higher latency trim values are used during media management operations, then reliability is enhanced, but operation speed decreases
Solution Approach 1:
The patent dynamically selects trim values based on the operation type being performed. The system adjusts the trim values in real-time: using high reliability trim values with higher latency for media management operations, and default trim values with lower latency for host write operations. This dynamic adaptation resolves the speed-reliability tradeoff.
Solution Approach 2:
The patent changes the trim value parameters depending on the operation context. By modifying the trim value parameter (switching between high reliability and default sets) based on whether the operation is media management or host write, the system optimizes both reliability and speed for different operational scenarios.
3Quantity of substance
If program-erase cycles increase, then storage capacity utilization improves, but error rates increase
Solution Approach 1:
The patent performs preliminary error correction actions by using high reliability trim values during media management operations before errors accumulate to problematic levels. This preventive approach addresses reliability issues proactively, allowing the system to handle increased program-erase cycles with reduced error rates.
Data Source
AI summary
A system comprises a memory device and a processing device, which is coupled to the memory device. The processing device receives a request to perform a write operation. The processing device determines whether the write operation is part of a media management operation. Responsive to determining the write operation is part of the media management operation, the processing device executes the write operation with a high reliability set of trim values, wherein the high reliability set of trim values corresponds to a higher latency value relative to a default latency value.