Image Forming Apparatus Data Backup Between Control Substrates
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Solution Overview
Problem
Existing image forming apparatuses face challenges in seamlessly transferring data between control substrates during replacements, leading to data loss when a substrate fails or is replaced, as existing backup configurations do not effectively synchronize data between storage elements.
Innovation Solution
The image forming apparatus incorporates a data backup system where data from one storage element is automatically transferred to another at predetermined intervals or when substrate replacement occurs, ensuring continuous data availability by using multiple control substrates and storage elements to store and backup data, thereby facilitating smooth transitions during substrate swaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is stored only in the primary control substrate, then storage capacity is sufficient, but data is lost when the substrate fails or is replaced
Solution Approach 1:
The patent implements a backup storage element that creates a copy of data from the primary storage element. When data is written to the primary storage element, it is simultaneously copied to the backup storage element, ensuring data retention even if the primary substrate fails or is replaced.
Solution Approach 2:
The patent assigns different roles to different storage elements based on their functionality. The primary storage element handles active data operations while the backup storage element maintains redundant copies, creating local quality differentiation that improves reliability without requiring complete system duplication.
2Reliability
If data is automatically backed up to another substrate, then data retention during replacement is improved, but data synchronization complexity increases
Solution Approach 1:
The patent performs backup operations in advance by continuously maintaining synchronized copies in the backup storage element before any substrate replacement occurs. This preliminary action ensures data availability without requiring complex synchronization during the replacement process itself.
Solution Approach 2:
The control element automatically manages the backup and synchronization processes without requiring external intervention. The system self-services by detecting when data needs to be backed up and performing the synchronization autonomously, reducing the complexity of manual data management.
3Duration of action of stationary object
If storage element lifetime is extended through software optimization, then replacement frequency decreases, but storage capacity and reliability remain limited
Solution Approach 1:
The patent performs backup operations in advance by continuously maintaining synchronized copies in the backup storage element before any substrate replacement occurs. This preliminary action ensures data availability without requiring complex synchronization during the replacement process itself.
Solution Approach 2:
The patent implements a backup storage element that creates a copy of data from the primary storage element. When data is written to the primary storage element, it is simultaneously copied to the backup storage element, ensuring data retention even if the primary substrate fails or is replaced.
Data Source
AI summary
An image forming apparatus includes an image forming portion, a sheet supply portion, and a control portion. The image forming portion forms an image on a sheet. The sheet supply portion supplies the sheet to the image forming portion. The control portion controls the image forming portion and the sheet supply portion. The control portion includes a first control substrate on which a first control element and a first storage element are mounted. The sheet supply portion includes a second control substrate on which a second control element and a second storage element are mounted. The first control element causes either one of the first storage element and the second storage element to store data related to the sheet supply portion and causes another one of the first storage element and the second storage element to back up the data related to the sheet supply portion at a predetermined timing.