Printing Apparatus Storage Control Unit Power Save Return Time
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Solution Overview
Problem
Current printing apparatus power save modes require users to wait for the hard disk device to activate, which takes several seconds to several minutes, affecting convenience and access time when returning to normal mode.
Innovation Solution
The implementation of an encode processing device that issues a RegDH signal to establish a pseudo link with the host, allowing for immediate activation processing and reducing the time required to return from power save mode to normal mode by using a SATA-SATA bridge device for data encoding and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the printing apparatus enters power save mode to reduce power consumption, then power during standby is reduced, but the time required to return to normal mode increases due to hard disk device activation
Solution Approach 1:
The storage control unit sends a communication establishment request to the hard disk device before the host controller is fully activated after returning from power save mode. This preliminary action allows the hard disk device to start rotating and preparing data before it is actually needed, reducing the overall return time while maintaining power save benefits
2Ease of operation
If the hard disk device is activated quickly to reduce return time, then user convenience is improved, but power consumption during standby increases
Solution Approach 1:
The system uses periodic polling where the storage control unit sends communication establishment requests at specific intervals after power save mode. This allows the hard disk device to be activated only when necessary and for the minimum required duration, balancing user convenience with power conservation during standby periods
Data Source
AI summary
A stress of a user caused by a waiting time at the time of activation of a printing apparatus or at the time of return from a power save mode to a normal mode is reduced. An information processing apparatus having a storage device includes a control unit configured to control the information processing apparatus and a storage control unit configured to control the storage device in accordance with instructions transmitted from the control unit, and the storage control unit transmits information indicating that communication with the storage device has been established to the control unit in response to a communication establishment request from the control unit before the communication with the storage device is established.