Dynamic Write Buffer Sizing in Data Storage Devices
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Solution Overview
Problem
Existing methods for determining the current write buffer size in data storage devices are inaccurate, leading to significant changes in write speed and user experience.
Innovation Solution
A method involving a memory controller that determines the current write buffer size by calculating a setting value based on the number of spare memory blocks, written memory blocks, and a predetermined threshold, and configures the buffer accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the write buffer size is not accurately determined, then the data storage device can operate with simple buffer configuration, but the write speed will change significantly and user experience deteriorates
Solution Approach 1:
The memory controller continuously monitors the number of spare memory blocks and dynamically adjusts the write buffer size based on real-time feedback about memory availability. This feedback mechanism enables accurate buffer size determination while maintaining adaptive performance optimization without requiring complex manual configuration.
Solution Approach 2:
The data storage device automatically determines its own optimal write buffer size by monitoring its internal memory block status. The memory controller performs self-assessment of spare block availability and autonomously configures the buffer, eliminating the need for external intervention or complex configuration procedures.
2Productivity
If a fixed buffer size is used, then the device configuration is simple, but the write speed varies significantly under different memory conditions
Solution Approach 1:
The write buffer size is transformed from a static fixed value to a dynamic parameter that automatically adjusts based on the number of spare memory blocks. This dynamic adaptation ensures consistent write performance by optimizing buffer size in real-time according to actual memory availability conditions.
Solution Approach 2:
The buffer size parameter is changed from a fixed configuration to a variable that responds to changes in memory block availability. By monitoring and reacting to parameter changes in the memory subsystem, the system maintains optimal write speed across different operational states without requiring complex external management.
3Reliability
If the buffer size is inaccurately estimated, then the initial configuration is simple, but the data arrangement and access performance are adversely affected
Solution Approach 1:
The system implements continuous monitoring of memory block status as feedback to ensure accurate buffer size determination. This feedback loop guarantees reliable access performance by maintaining the buffer size appropriate to the current number of spare blocks, preventing performance degradation from inaccurate estimation.
Solution Approach 2:
The patent replaces complex manual or heuristic buffer size estimation methods with an automated electronic monitoring and calculation system. The memory controller electronically tracks spare block counts and computationally determines optimal buffer size, substituting mechanical or manual configuration processes with automated electronic control for improved reliability.
Data Source
AI summary
A data storage device includes a memory device and a memory controller. The memory device includes multiple memory blocks. The memory blocks includes one or more spare memory blocks that are not written with data and one or more predetermined memory blocks that are configured as a buffer for receiving data from a host device. The memory controller is coupled to the memory device and configured to access the memory device. The memory controller is configured to determine a setting value of a number of said one or more predetermined memory blocks according to a number of currently remaining spare memory block(s), a number of the predetermined memory block(s) that has/have been written with data among said one or more predetermined memory blocks and a predetermined threshold, and configure the number of the predetermined memory block(s) as the buffer according to the setting value.