Memory Write Buffering for Unaligned L2P Address Updates
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Solution Overview
Problem
As memory devices increase in capacity, the use of larger logical unit sizes for L2P tables increases the likelihood of unaligned write requests, leading to increased processing resources and time consumption due to the need for additional operations to handle smaller data sizes.
Innovation Solution
The memory device is configured to use a larger logical unit size for L2P table entries while allowing other components to operate with a smaller logical unit size, utilizing a bundled unit that includes a set of TUs, and performing address translation and buffer allocation only for unaligned write requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If larger logical unit sizes are used for L2P table entries, then memory device capacity increases, but unaligned write requests become more frequent leading to increased processing time and resource consumption
Solution Approach 1:
The patent segments the logical unit into multiple smaller units within a bundled unit structure. When an unaligned write request occurs, only the affected segment (specific TU) is processed rather than the entire bundled unit, reducing processing time and resource consumption while maintaining the larger logical unit size for capacity efficiency.
2Quantity of substance
If larger logical unit sizes are used for L2P table entries, then memory device capacity increases, but additional operations are required to handle smaller data sizes
Solution Approach 1:
The patent applies local quality by making different parts of the system operate at different granularities. The L2P table uses larger logical unit sizes for capacity efficiency, while the bundled unit structure allows selective processing of only the necessary smaller segments during unaligned write operations, avoiding the need for additional operations on the entire unit.
3Ease of operation
If the memory device operates with a single logical unit size, then system simplicity is maintained, but unaligned write requests require additional processing operations
Solution Approach 1:
The patent introduces dynamic adaptability through the bundled unit structure, allowing the system to flexibly handle both aligned and unaligned write requests efficiently. The bundled unit can be processed as a whole when aligned, or segmented into smaller TUs when unaligned, optimizing processing efficiency without sacrificing operational simplicity.
Data Source
AI summary
Implementations described herein relate to memory device operations for unaligned write operations. In some implementations, a memory device may receive, from a host device, a write command indicating data having a first size that corresponds to a first write unit and a first logical address. The memory device may allocate a set of buffers for the write command. The memory device may determine a set of physical addresses corresponding to a physical address that is associated with the second size, where the set of physical addresses are each associated with the first size. The memory device may merge stored data from the set of physical addresses to one or more buffers, from the set of buffers, that do not include the data to generate a data unit having the second size. The memory device may write the data unit to memory indicated by the set of physical addresses.