Memory Card State Identification for Flexible File System Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional memory cards divided into multiple regions with independent file systems limit the maximum size of files and directories, and existing access devices cannot identify the type and status of memory cards, leading to inappropriate processing.
Innovation Solution
A memory card with a state storage section to uniquely identify its type and status, and an access device with a state judging unit to execute processes based on the acquired state, allowing for appropriate handling of different memory card configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the memory card is divided into multiple regions with independent file systems, then the memory capacity can be enlarged beyond physical register limits, but the maximum file size and directory composition are limited
Solution Approach 1:
The memory card is divided into multiple regions (first recording region and second recording region) that can be independently managed. Each region can be accessed separately or combined, allowing the system to overcome individual region size limitations while maintaining flexibility in file organization and directory structure across the entire memory capacity.
2Device complexity
If conventional access devices are used, then device simplicity is maintained, but the devices cannot identify memory card type and status, leading to inappropriate processing
Solution Approach 1:
The memory card includes a state storage section that pre-stores state information identifying the card's type and status before access. This allows the access device to immediately identify the card configuration and execute appropriate processing without requiring complex identification routines, thereby maintaining device simplicity while ensuring reliable, appropriate handling.
Data Source
AI summary
Each of memory cards can have a different type and can be in a plurality of statuses. The memory cards are managed by a file system and data is read/written from/to the memory cards via an access device. Each of the memory cards has a recording area in which data is recorded and managed by an independent file system, a state storage section for storing state assigned to each of combinations of the memory card type and status and being capable of uniquely identifying the combination, and card information storage sections the number of which is identical to the number of states the memory card can have, and which store physical characteristics concerning the recording area. The access device acquires from the memory card a state enable uniquely identifying the memory card type and status. According to the state acquired, the access device identifies the type and status of the memory card and executes processing in accordance with the memory card state.