Non-Volatile Memory Queue System for Power-Cycle Data Retention
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Solution Overview
Problem
Non-volatile memory storage systems face challenges in storing and executing multiple memory operations due to timing limitations, leading to deferred or ignored operations, and potential data loss during power loss, which reduces system reliability.
Innovation Solution
Implementing a queue system within the non-volatile memory storage system to store and schedule multiple types of memory operations, including housekeeping operations, and assigning priorities to ensure execution even across power cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If memory operations are stored in RAM, then execution speed is improved, but data loss occurs during power loss and multiple operation types cannot be stored
Solution Approach 1:
The invention segments the storage system into multiple queues, each dedicated to storing a specific type of memory operation (e.g., read operations, write operations, erase operations). This segmentation allows the system to maintain multiple operation types simultaneously while preserving data across power cycles, as each queue is implemented in non-volatile memory rather than volatile RAM.
Solution Approach 2:
The invention introduces an intermediary mechanism between the controller and memory operations: a scheduling system that manages multiple queues in non-volatile memory. This intermediary allows operations to be stored reliably across power cycles while still enabling efficient execution by scheduling them appropriately, thus bridging the gap between reliability and speed requirements.
2Productivity
If memory operations are executed immediately, then productivity is improved, but timing limitations cause operations to be deferred or ignored
Solution Approach 1:
The invention applies preliminary action by pre-storing memory operations in dedicated queues within non-volatile memory before execution. This allows operations to be prepared and queued in advance according to their type and priority, ensuring they are ready for execution when timing conditions are favorable, thus preventing deferral or loss due to timing limitations.
Solution Approach 2:
The scheduling system implements periodic action by continuously monitoring and executing memory operations from the queues at appropriate intervals. This periodic execution mechanism ensures that operations are processed systematically over time, preventing bottlenecks and ensuring that timing limitations do not cause operations to be deferred or ignored.
3Device complexity
If a single RAM stores memory operations, then device complexity is reduced, but the system cannot handle multiple operation types simultaneously
Solution Approach 1:
The invention achieves universality by implementing multiple queues within the non-volatile memory storage system, where each queue is specialized for a particular type of memory operation. This multi-functional approach allows the system to handle read, write, erase, and other operation types simultaneously while maintaining a unified storage architecture, thus increasing adaptability without proportionally increasing complexity.
Data Source
AI summary
A method for operating a non-volatile memory storage system is provided. In this method, a queue that is configured to store memory operations associated with two or more types of memory operations. Here, memory operations are associated with the maintenance of the non-volatile memory storage system. A memory operation is scheduled for execution in response to an event and the memory operation is stored in the queue.