Memory Controller Migrate Command Data Access
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Solution Overview
Problem
Existing memory devices, such as Flash memory, face performance issues due to excessive time spent on internal operations in response to host-side requests, leading to reduced overall performance and potential side effects from existing solutions.
Innovation Solution
A method and apparatus for data access control using a predetermined migrate command, which allows the memory controller to migrate data from a source logical address to a destination logical address within the memory device without requiring data transfer between the host device and memory device, thereby reducing the number of host commands needed and enhancing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the memory device performs internal operations in response to host-side requests using existing methods, then data access control is achieved, but the memory device spends excessive time on internal operations causing reduced overall performance
Solution Approach 1:
The patent introduces a migrate command that allows data to be moved between different physical addresses within the memory device before the host device needs to access it. This preliminary data repositioning operation enables the memory device to optimize its internal structure and prepare data for future access, reducing the time required for subsequent internal operations while maintaining high overall performance
2Productivity
If existing solutions are implemented to correct performance problems, then some performance improvements are achieved, but side effects are introduced
Solution Approach 1:
The memory device autonomously executes the migrate command to reposition data within its own storage structure without requiring external intervention or complex host-side management. This self-service approach allows the memory device to maintain optimal performance while avoiding the side effects that arise from complex interaction protocols between the host device and memory device
3Productivity
If data is migrated within the memory device using a single predetermined command, then the number of host commands is reduced and performance is enhanced, but the command format complexity increases
Solution Approach 1:
The migrate command is designed as a universal, predetermined command format that can handle various data migration scenarios within the memory device. By consolidating multiple operations into a single multi-functional command, the system reduces the number of host commands needed while the standardized format minimizes the actual complexity increase, making the command easy to implement and process
Data Source
AI summary
A method for performing data access control of a memory device with aid of a predetermined command and associated apparatus are provided. The method may include: utilizing the memory controller to receive a first single command from a host device through a transmission interface circuit of the memory controller; and in response to the first single command conforming to a predetermined format of the predetermined command, utilizing the memory controller to perform a series of operations according to the first single command, wherein the first single command represents a first migrate command, for migrating from a first source logical address to a first destination logical address. The series of operations may include: reading first data at the first source logical address; writing the first data at the first destination logical address; and controlling the memory device to make the first data at the first source logical address become invalid data.