Self-Powered Indicator With Latched Status Signal
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Solution Overview
Problem
Conventional data storage systems lose power for failure indicators when detached from a server rack or powered down, making it difficult for administrators to identify and replace failed components.
Innovation Solution
A rack-mountable computer system with an internal power supply unit, including a power storage module and a power switch module, that switches power to indicators and latches status signals, allowing indicators to remain functional even when detached from the rack or powered off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the indicator is powered by the system power from the server rack, then the indicator can function normally during operation, but the indicator loses power when the server rack is detached or system power is lost
Solution Approach 1:
The indicator is equipped with an internal power supply unit that enables it to power itself independently of the server rack's system power. This self-service capability allows the indicator to maintain functionality during power loss events or when the rack is detached, resolving the contradiction between reliable indication and power supply dependency
Solution Approach 2:
The power supply system is segmented into the external server rack power source and an internal power supply unit within the indicator. This segmentation allows the indicator to have its own independent power source, eliminating complete dependency on the system power while maintaining the ability to receive power when connected
2Ease of operation
If the server rack is detached from the rack for servicing or replacement, then access to the failed data storage device is enabled, but the indicator loses power and cannot indicate status
Solution Approach 1:
The internal power supply unit enables the indicator to service itself by providing power independently when detached from the rack. This ensures the indicator continues to display status information during the entire servicing process, preventing loss of critical status information while maintaining ease of device access
3Reliability
If an internal power supply unit is added to the indicator, then the indicator can maintain power during system power loss, but the device complexity increases
Solution Approach 1:
The power supply functionality is extracted as a separate, dedicated internal power supply unit rather than being integrated into the main indicator circuitry. This extraction allows the indicator to have reliable power continuity while keeping the complexity isolated to a specific module, making the overall system more manageable despite the added component
Data Source
AI summary
A rack-mountable computer system includes: a power supply unit comprising a power storage module and a power switch module; a controller configured to generate a signal indicating status information of the rack-mountable computer system; an indicator configured to indicate the status information of the rack-mountable computer system; and a signal latch module. The power supply unit switches a power supply of the indicator from the external power supply unit to the power supply unit in a power loss event when the rack-mountable computer system is detached from a rack or a system power of the rack is lost from an external power supply unit and supplies power to the indicator after the power loss event occurs. The signal latch module is configured to latch the signal that is generated by the controller and indicates the status information of the rack-mountable computer system in response to the power loss event.