Memory Control Circuit Unit Managing Physical Erasing Units
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Solution Overview
Problem
The data writing speed in rewritable non-volatile memory modules is often insufficient, leading to data loss due to temporary storage in cache memory before being written, especially when dealing with videos or images, as the existing technologies fail to efficiently manage the usage frequency of physical erasing units, resulting in prolonged waiting times and incomplete data storage.
Innovation Solution
A data writing method that identifies the usage frequency of physical erasing units and performs a data arrangement operation by copying data from less frequently used units to more idle units, allowing for simultaneous execution of command information in a pipeline manner to reduce writing time and prevent data loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is temporarily stored in cache memory before being written into the rewritable non-volatile memory module, then data loss is prevented, but data writing speed becomes overly slow
Solution Approach 1:
The system proactively identifies physical erasing units with low usage frequencies in advance and performs data arrangement operations before cache memory becomes full. By counting usage frequencies and selecting target units beforehand, the system prepares storage resources in advance, enabling faster data writing without compromising reliability.
Solution Approach 2:
The memory control circuit unit autonomously manages the data arrangement operation by automatically identifying low-usage physical erasing units, selecting target units, and executing data copying without external intervention. This self-service mechanism continuously optimizes storage resource allocation, maintaining both high writing speed and data reliability.
2Speed
If data arrangement operation is performed to copy data from low usage frequency units to idle units, then writing speed is improved, but device complexity increases
Solution Approach 1:
The system implements a feedback mechanism by continuously counting and monitoring usage frequencies of physical erasing units. This feedback information guides the selection of target units for data arrangement operations, enabling intelligent and adaptive management of storage resources without requiring complex external control logic.
Solution Approach 2:
The memory control circuit unit autonomously performs the entire data arrangement process including usage frequency counting, target unit selection, and data copying. This self-service capability simplifies the overall system architecture by integrating all necessary functions into a single control unit, reducing external complexity while maintaining high writing speed.
3Loss of time
If the number of physical erasing units is increased to reduce waiting time, then data writing speed is improved, but loss of substance increases
Solution Approach 1:
The system dynamically changes the operational status of physical erasing units by tracking usage frequencies and transitioning units between active and idle states based on their utilization patterns. This parameter-based management allows the system to reduce waiting time by efficiently activating idle units without permanently increasing total memory capacity, thus avoiding substance loss.
Solution Approach 2:
The system employs dynamic resource allocation where physical erasing units can transition between different operational states (active, idle, low-usage) based on real-time usage frequencies. This dynamic approach allows the same physical memory capacity to serve multiple purposes over time, reducing waiting time without requiring additional memory substance.
Data Source
AI summary
A data writing method, a memory control circuit unit and a memory storage apparatus are provided. The method includes: receiving a first write command and first data corresponding to the first write command, and writing the first data into a third physical erasing unit in first physical erasing units; and if a usage frequency of a fourth physical erasing unit in the first physical erasing units is less than a predetermined value, performing a data arrangement operation corresponding to the first write command to copy second data stored by the fourth physical to at least one of second physical erasing units.