Image Forming Apparatus Selective Backup Storage
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Solution Overview
Problem
Conventional image forming apparatuses face issues with data read errors due to defective sectors in hard disks, leading to increased storage capacity consumption when storing multiple copies of the same data for all jobs.
Innovation Solution
The apparatus selectively stores backup image data only for specific job types, avoiding unnecessary storage and reducing the risk of read errors while managing storage capacity effectively by distinguishing between job types based on their requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple copies of the same data are stored for all jobs, then read errors are suppressed, but hard disk capacity is greatly consumed
Solution Approach 1:
The patent applies local quality by differentiating storage strategies based on job types. Important jobs (e.g., paid services, external storage) receive backup storage to suppress read errors, while less critical jobs (e.g., internal storage, already backed up) do not receive backups. This selective approach maintains reliability where needed while conserving hard disk capacity.
Solution Approach 2:
The patent segments jobs into different categories based on their importance and storage requirements. By dividing jobs into groups such as paid services, external storage, internal storage, and other categories, the system applies different backup strategies to each segment, optimizing both reliability and storage efficiency.
2Reliability
If backup data is stored for important jobs, then read errors are suppressed, but storage capacity is consumed
Solution Approach 1:
The patent applies local quality by differentiating storage strategies based on job types. Important jobs (e.g., paid services, external storage) receive backup storage to suppress read errors, while less critical jobs (e.g., internal storage, already backed up) do not receive backups. This selective approach maintains reliability where needed while conserving hard disk capacity.
Data Source
AI summary
When a plurality of units of the same data is stored for all jobs, the capacity of a hard disk may be greatly consumed. The present disclosure relates to a storage that stores data based on a job, and a controller configured to cause the storage to store the data and not to store data identical to the data, based on a job type of the job being a first type, and cause the storage to store the data and the data identical to the data, based on the job type of the job being a second type different from the first type.