Image Forming Apparatus Hibernation State Verification
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Solution Overview
Problem
Existing image forming apparatuses face challenges in supporting device connection states that differ at power-off and startup, as hibernation functions fail to cope with configuration changes and inconsistencies, leading to inefficient startup methods and management issues.
Innovation Solution
The apparatus employs a hibernation function that creates and stores a hibernation image based on device connection states, allowing for selective startup methods by comparing previous and current connection states, enabling cold booting when states differ and using the hibernation image when they match, thus avoiding inconsistencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a hibernation image is stored and used for startup, then startup speed is improved, but the system cannot cope with device connection state changes
Solution Approach 1:
The system performs preliminary detection of device connection states during startup before using the hibernation image. By checking whether connected devices match the state when the hibernation image was created, the system can determine in advance whether the hibernation image is applicable, thus enabling fast startup when conditions permit while maintaining adaptability when conditions change.
Solution Approach 2:
The system implements a feedback mechanism where the detected device connection state is compared with the stored state information. Based on this comparison feedback, the system decides whether to use the hibernation image or perform a cold boot, thus adapting to changing conditions while maintaining startup performance.
2Loss of time
If device connection states are not verified before using hibernation image, then startup is faster, but inconsistency between user settings and hibernation image occurs
Solution Approach 1:
The system performs preliminary verification of device connection states before committing to using the hibernation image. This preliminary check ensures that the hardware configuration matches what was captured in the hibernation image, preventing inconsistencies while minimizing startup time through efficient detection.
Solution Approach 2:
The system takes preliminary anti-action by detecting device connection states and comparing them with stored information before using the hibernation image. This prevents the harmful effect of settings inconsistency from occurring in the first place, rather than correcting it after startup.
3Productivity
If hibernation image is created with specific device configurations, then startup efficiency is improved, but the system cannot support configuration changes
Solution Approach 1:
The system performs preliminary detection and comparison of device connection states before using the hibernation image. This allows the system to maintain high startup efficiency when configurations match while adapting to configuration changes when they differ, resolving the contradiction between efficiency and adaptability.
Solution Approach 2:
The system dynamically adjusts its startup method based on the detected device connection state. When devices match the hibernation image state, it uses the fast hibernation startup; when devices have changed, it performs a cold boot. This dynamic adaptation allows the system to optimize startup efficiency for each specific configuration state.
Data Source
AI summary
An image forming apparatus which has a hibernation function and is capable of selecting a suitable startup method even in a case where device connection states are different at power-off and at next startup. A hibernation image created based on data stored in a memory of the image forming apparatus and a first device connection state indicative of whether the device is connected to the image forming apparatus are stored in a flash disk. After that, when power to the image forming apparatus is turned off and the power is turned on again, a second device connection state indicative of whether the device is connected to the image forming apparatus is obtained. When the first and second connection states are different, the image forming apparatus is started without using the hibernation image, and when they are the same, the image forming apparatus is started using the hibernation image.