Storage Device Power State Based Reliability Management

Solution Overview

Problem

Semiconductor memory devices face challenges in maintaining data reliability and performance due to the limited write count and resource consumption associated with traditional backup methods for nonvolatile memory devices, especially in mobile devices with unpredictable power supplies.

Innovation Solution

A method and system for a storage device that receives power state information from a host, determines the power state, and selects a reliability level for the nonvolatile memory device, performing corresponding reliability guarantee operations, such as data backup, to manage resource usage and performance dynamically based on the power state.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If data backup operations are performed periodically to maintain data reliability, then data reliability is improved, but resource consumption increases and device lifespan decreases

Engineering Contradiction:

Improvedata reliabilityVSAvoiddevice lifespan

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The patent implements dynamic adjustment of backup frequency based on detected power state changes. The memory controller monitors power state information and adapts the backup operation frequency accordingly - performing frequent backups when power state is unstable and reducing backup frequency when power state is stable, thereby optimizing the balance between data reliability and device lifespan

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the parameter of backup operation frequency based on power state conditions. By detecting power state information and adjusting the backup frequency parameter dynamically, the system achieves both data reliability protection and resource conservation, extending device lifespan while maintaining adequate backup protection

Inventive Principle:

Principle #35Parameter changes

2Reliability

If data backup operations are performed periodically to maintain data reliability, then data reliability is improved, but resource consumption increases

Engineering Contradiction:

Improvedata reliabilityVSAvoidresource consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic adjustment of backup frequency based on detected power state changes. The memory controller monitors power state information and adapts the backup operation frequency accordingly - performing frequent backups when power state is unstable and reducing backup frequency when power state is stable, thereby optimizing the balance between data reliability and resource consumption

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the parameter of backup operation frequency based on power state conditions. By detecting power state information and adjusting the backup frequency parameter dynamically, the system achieves both data reliability protection and resource conservation, reducing unnecessary energy consumption while maintaining adequate backup protection

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9672915B2Storage device using power state information and operating method thereof

Publication Date: 2017.06.06 SAMSUNG ELECTRONICS CO LTD

AI summary

A storage device includes a nonvolatile memory device and a memory controller configured to control the nonvolatile memory device in response to a request from a host. The memory controller is configured to employ state information related to the confidence level of a power supply to determine a reliability level with respect to an access operation of the memory device and to perform a reliability guarantee operation corresponding to the determined reliability level.