Memory Die Boundary Alignment Using Write Buffer Padding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Memory die misalignment in NAND devices leads to inefficient read operations and increased latency, particularly for large data files, due to the need for multiple read operations across multiple multi-plane pages.
Innovation Solution
Implementing techniques for padding data in a write buffer to align data with the memory die boundary, ensuring that data written to the memory device starts at a zero offset, thereby mitigating misalignment and improving read performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data is written to memory die starting at non-zero offset, then data can be stored flexibly, but read operations become inefficient and latency increases
Solution Approach 1:
The system performs preliminary alignment of data in the write buffer before writing to the memory die. The controller determines whether data is aligned with the memory die boundary and, if not, pads the data with dummy data to achieve alignment. This preliminary action ensures that subsequent read operations can be performed efficiently without requiring multiple read operations, thus reducing read latency while maintaining flexible data storage capability.
2Adaptability or versatility
If data is written to memory die starting at non-zero offset, then storage flexibility is maintained, but processing overhead increases
Solution Approach 1:
The controller performs preliminary alignment of data in the write buffer by determining alignment status and padding with dummy data when necessary. This preliminary action is performed before data is written to the memory die, ensuring that the data is properly aligned. This approach maintains storage flexibility while reducing processing overhead during read operations, as the alignment is handled in advance rather than during read access.
3Reliability
If multiple read operations are performed to read data from non-zero offset, then complete data retrieval is achieved, but read performance decreases
Solution Approach 1:
The system performs preliminary alignment of data in the write buffer before writing to the memory die. By ensuring data is aligned with the memory die boundary through padding with dummy data when necessary, the system enables subsequent read operations to retrieve complete data in a single operation rather than requiring multiple read operations. This maintains data retrieval completeness while significantly improving read performance.
Data Source
AI summary
Methods, systems, and devices for mitigating memory die misalignment are described. A memory system may receive a command to write data to a memory device including a memory die. The memory system may determine whether the data indicated by the command (e.g., a first set of data) satisfies a threshold size. If the first set of data satisfies the threshold size, the memory system may determine whether data currently in a write buffer aligns with a boundary of the memory die. For example, depending on the data currently in the buffer, adding the first set of data to the buffer may result in die misalignment for the first set of data. To mitigate die misalignment, the memory system may pad data (e.g., add dummy data) to the write buffer, such that the padding aligns the data with the die boundary.