Map Data Converter for Storage Device Address Translation
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Solution Overview
Problem
Current storage devices face challenges in efficiently converting and managing mapping data between logical and physical addresses, leading to inefficiencies in data retrieval and storage operations.
Innovation Solution
A storage device with a memory controller that includes a map data processor and a map data converter, capable of generating mode signals to convert original map data segments into converted map data segments, storing them in target storage areas with adjusted offsets, and managing mapping information using a map cache to optimize data access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If map data segments are sequentially stored in source storage areas corresponding to source addresses, then the mapping structure is simplified, but the data retrieval speed decreases due to non-sequential access patterns
Solution Approach 1:
The patent introduces a map data converter as an intermediary component that translates between sequential source addresses and non-sequential target addresses. This converter acts as a mediator that maintains the simplicity of sequential storage while enabling efficient random access through address translation, resolving the contradiction between structural simplicity and access speed.
Solution Approach 2:
The patent divides the map data into multiple segments stored in different storage areas. Each segment can be independently accessed and managed, allowing the system to maintain simple sequential storage structures while achieving fast retrieval through selective segment access and parallel processing.
2Adaptability or versatility
If map data is converted between different address formats, then compatibility with different storage systems is improved, but the conversion operation complexity increases
Solution Approach 1:
The map data converter is designed with multi-functionality to handle various address format conversions (logical to physical, different addressing schemes). By consolidating multiple conversion functions into a single universal converter, the system achieves broad compatibility while minimizing the number of separate conversion components needed, thus reducing overall complexity.
Solution Approach 2:
The patent employs parameter changes in the address conversion process, where conversion parameters such as offset values and mapping rules are dynamically adjusted based on the specific conversion needs. This allows the same converter structure to handle multiple address formats by changing parameters rather than requiring different conversion mechanisms for each format.
3Adaptability or versatility
If offset intervals between source addresses differ from offset intervals between target addresses, then flexible mapping is achieved, but the conversion processing time increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing offset values and mapping relationships in the map data converter. Frequently used offset intervals are pre-computed and cached, allowing the converter to perform rapid lookups rather than calculating conversions in real-time. This reduces conversion processing time while maintaining flexible offset interval support.
Solution Approach 2:
The patent implements local quality by optimizing the conversion process for different regions of the address space. Commonly accessed address ranges with fixed offset patterns use optimized conversion paths, while less frequently accessed ranges with variable offsets use the general conversion mechanism. This localized optimization reduces overall conversion time while preserving mapping flexibility.
Data Source
AI summary
A memory controller may include: a map data processor configured to receive original map data segments from a memory device and generate a mode signal; an original map data storage configured to sequentially store the original map data segments in source storage areas corresponding to source addresses; a converted map data storage configured to store the original map data segments in target storage areas corresponding to target addresses; and a map data converter configured to control the converted map data storage such that, when any one original map data segment is stored in a first target storage area corresponding to a first target address, an original map data segment subsequent to the any one original map data segment is stored in a second target storage area corresponding to a second target address obtained by adding a predetermined offset to the first target address.