Memory Sub-System Rate Control for Block Stripe Folding Deadlines

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Solution Overview

Problem

Existing memory sub-systems face challenges in efficiently managing block stripes due to increased write amplification and missed data folding deadlines, leading to reduced performance and lifespan of memory devices.

Innovation Solution

Implementing a memory sub-system that performs block stripe management using rate control, which includes determining immediate folding criteria based on reasons such as programming fails and scan results, and prioritizing folding operations through deadline values, priority values, and resource allocation to balance data folding deadlines and reduce write amplification.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If block stripe management is performed without rate control, then data folding operations can be executed immediately when criteria are met, but write amplification increases and deadlines are missed

Engineering Contradiction:

Improvedata folding operation speedVSAvoiddeadline satisfaction

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system dynamically adjusts the rate of data folding operations based on real-time conditions. A rate control value is determined and used to pace folding operations, allowing the system to adapt between immediate execution and controlled pacing depending on system state, thereby maintaining deadline satisfaction while improving productivity

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes operational parameters by introducing rate control values that modify the execution characteristics of data folding operations. By adjusting these rate parameters, the system optimizes the balance between operation speed and deadline compliance, resolving the contradiction between productivity and reliability

Inventive Principle:

Principle #35Parameter changes

2Reliability

If immediate folding is performed for all block stripes, then data folding deadlines are satisfied, but write amplification increases reducing memory device lifespan

Engineering Contradiction:

Improvedeadline satisfactionVSAvoidwrite amplification

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The system applies different quality levels of folding operations to different block stripes based on their specific characteristics and criteria. Instead of uniform immediate folding, the rate control mechanism applies localized adjustments, performing folding at appropriate rates for specific block stripes, thereby reducing overall write amplification while maintaining necessary deadline satisfaction

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system performs partial folding actions rather than complete immediate folding for all block stripes. By controlling the rate and scope of folding operations, the system achieves sufficient deadline satisfaction without the excessive write amplification that would result from aggressive immediate folding across all block stripes

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If data folding operations are prioritized without rate control, then folding deadlines are met, but system resource allocation becomes unbalanced

Engineering Contradiction:

Improvefolding deadline satisfactionVSAvoidresource allocation balance

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The rate control mechanism serves multiple functions simultaneously: it prioritizes folding operations to meet deadlines while also balancing system resource allocation. This universal control mechanism manages both timing constraints and resource distribution, reducing system complexity by consolidating control logic rather than requiring separate mechanisms for each objective

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260016955A1Memory sub-system for performing block stripe management using rate control

Publication Date: 2026.01.15 MICRON TECHNOLOGY INC

AI summary

Various aspects of the present disclosure relate to a process for block stripe management using rate control. A processing device may determine, at a time value associated with a timer of the memory device, to perform immediate folding for a block stripe of a plurality of block stripes. The processing device may identify a deadline value, a priority value, and a resource value corresponding to the immediate folding criteria. The processing device may add the block stripe to an immediate folding queue based on a combination of the deadline value and the time value. The processing device may determine, based on the priority value and the resource value, a rate control value for performing immediate folding. The processing device may perform the immediate folding using the rate control value.