Flash Memory Controller Logical Zone Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing data storing methods for flash memory modules are inefficient due to the need for frequent switching between logical address mapping tables, which slows down the writing operation in flash memory storage apparatuses.
Innovation Solution
A data storing method that configures logical addresses into zones with corresponding mapping tables, uses a temporary mapping table to record mapping records, and updates these records when the temporary table is full, reducing the need for frequent table switching by updating the main mapping tables and deleting records in the temporary table.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequent switching between logical address mapping tables is performed to record mapping relations, then data storage flexibility is improved, but writing operation speed deteriorates
Solution Approach 1:
The patent segments the logical address mapping tables into multiple separate tables (first logical address mapping table, second logical address mapping table, etc.), each corresponding to different logical zones. This segmentation allows the system to manage mapping relations more efficiently by selecting specific tables based on the logical zone, reducing the need to switch between all tables and thereby improving writing operation speed while maintaining storage flexibility.
Solution Approach 2:
The patent introduces a mapping table management unit as an intermediary component that manages multiple logical address mapping tables. This intermediary selectively activates and switches between different mapping tables based on the logical zone of the data being written, reducing unnecessary table switching operations and improving writing speed while preserving the adaptability of the storage system.
2Measurement precision
If mapping tables are frequently updated and switched, then mapping accuracy is improved, but time consumption increases
Solution Approach 1:
By dividing the mapping management into multiple specialized tables corresponding to different logical zones, the system updates only the relevant table for each writing operation rather than updating all tables. This segmentation maintains mapping accuracy for each zone while significantly reducing the time consumption associated with frequent full-table updates and switching.
Solution Approach 2:
The patent establishes multiple logical address mapping tables in advance, each pre-configured for specific logical zones. This preliminary preparation allows the mapping table management unit to quickly select and update only the appropriate table during writing operations, maintaining high mapping accuracy while minimizing the time required for table switching and updates.
Data Source
AI summary
A data storing method for a rewritable non-volatile memory module is provided. The method includes dividing logical addresses into a plurality of logical zones, and respectively establishing a plurality of logical address mapping tables for the logical zones. The method also includes writing data of a logical address into a physical program unit; and recording a mapping record indicating the logical address is mapped to the physical program unit in a temp mapping table. The method further includes: if the temp mapping table is full, updating the mapping relations between the logical addresses and the physical program units in the logical address mapping tables based on mapping records recorded in the temp mapping table, and deleting the mapping records in the temp mapping table.