Controller Power Failure Detection in Non-Volatile Memory Storage
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Solution Overview
Problem
As semiconductor integration advances, it becomes increasingly difficult to prevent all possible defects in storage devices like SSDs, particularly power failures, which can lead to reliability issues.
Innovation Solution
A storage device and system that incorporates a power management integrated circuit chip, non-volatile memories, and a controller, where the controller checks the power state during read and write operations and implements a power failure detection mode when a failure is detected, using both hardware and software to ensure precise detection and minimize data loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If hardware and software work together to detect power failures, then detection precision is improved, but device complexity increases
Solution Approach 1:
The power failure detection function is divided into two independent segments: a hardware detection circuit that monitors power supply status and a software detection mode that executes detection algorithms. This segmentation allows each component to specialize in specific detection tasks, improving overall detection precision while maintaining manageable system complexity through modular architecture.
Solution Approach 2:
The patent merges hardware detection capabilities with software detection modes to create a hybrid detection system. The hardware circuit provides foundational power status monitoring while the software layer adds sophisticated detection algorithms, combining the strengths of both approaches to achieve high detection precision without over-relying on a single complex subsystem.
2Reliability
If power failure detection mode is implemented on all non-volatile memories, then reliability is improved, but operation time is reduced
Solution Approach 1:
The system performs preliminary power failure detection before executing critical read/write operations on non-volatile memories. By checking power supply stability in advance and implementing the detection mode proactively, the system prevents potential failures from disrupting operations, thereby improving reliability without requiring continuous time-consuming detection during every operation.
Solution Approach 2:
The detection system continuously monitors power supply status and provides feedback to the control circuit. When power failure is detected, the system can quickly adjust operation modes or pause critical operations, enabling rapid response that minimizes time loss while maintaining high reliability through continuous monitoring and adaptive control.
Data Source
AI summary
Provided is a storage device including a power management integrated circuit chip; multiple non-volatile memories configured to receive power from the power management integrated circuit chip; and a controller configured to control the non-volatile memories, wherein the controller checks a state of the power during a read operation and a write operation on the non-volatile memories and, when a power failure is detected in at least one of the non-volatile memories, implements a power failure detection mode regarding the read operation and the write operation on all of the non-volatile memories.