Turbo Write Buffer Segmentation for Flash Memory Speed
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current semiconductor storage devices face limitations in achieving high write and read speeds, particularly in flash memory systems, where existing technologies do not efficiently utilize buffer areas to enhance operational performance.
Innovation Solution
A storage device architecture that includes a turbo write buffer divided into pinned and non-pinned areas, along with a user storage area, where the controller prioritizes data writes based on a policy received from the host device, enabling faster write operations by utilizing the turbo write buffer for high-speed SLC programming and migrating data to TLC user storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If data is written directly to TLC user storage, then storage capacity is maximized, but write speed is limited
Solution Approach 1:
The storage device is segmented into multiple areas including SLC buffer areas (first and second areas) and TLC user storage area (third area). This segmentation allows different parts of the storage system to serve different functions: the SLC areas provide high-speed write capability while the TLC area provides high-capacity storage, thereby resolving the contradiction between write speed and storage capacity.
Solution Approach 2:
The SLC buffer areas act as intermediaries between the host device and the TLC user storage. Data is first written to the SLC buffer areas at high speed, then gradually migrated to the TLC user storage. This intermediary mechanism enables the system to achieve both high write speed (through SLC) and high storage capacity (through TLC), resolving the contradiction between speed and capacity.
2Productivity
If a buffer area is introduced to accelerate write operations, then write speed improves, but device complexity increases
Solution Approach 1:
The SLC buffer areas serve multiple functions: they act as high-speed write targets when the turbo write function is enabled, and can also serve as regular storage areas when the turbo write function is disabled. This multi-functionality allows the buffer areas to accelerate write operations while maintaining flexibility in storage management, thereby improving productivity without excessively increasing device complexity.
3Speed
If turbo write function is enabled to use SLC buffer, then write speed accelerates, but data migration management complexity increases
Solution Approach 1:
The storage system dynamically adjusts its operation mode based on the turbo write enable/disable status. When turbo write is enabled, the system preferentially writes data to SLC buffer areas and implements automated migration policies to move data to TLC user storage. When turbo write is disabled, the system operates in a simpler mode writing directly to available storage areas. This dynamic adaptation allows the system to achieve high write speeds when needed while managing migration complexity through automated policies.
4Productivity
If data is preferentially written to SLC buffer area, then write performance improves, but buffer management complexity increases
Solution Approach 1:
The storage device implements self-service mechanisms for buffer management through automated migration policies. The system automatically monitors the SLC buffer areas and migrates data to the TLC user storage when appropriate, without requiring external intervention. This self-service approach improves write operation efficiency by maintaining the buffer areas ready for high-speed writes while automatically managing the complexity of buffer fullness and data migration.
Data Source
AI summary
A storage device includes a nonvolatile memory device that includes a first area, a second area, and a third area, and a controller that receives a write command and first data from a host device, preferentially writes the first data in the first area or the second area rather than the third area when the first data is associated with a turbo write, and writes the first data in the first area, the second area, or the third area when the first data is associated with a normal write. The controller moves second data between the first area, the second area, and the third area based on the policy received from the host device.