Storage Controller Background Operations Before Low Power Entry
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Solution Overview
Problem
Existing storage devices consume significant power during background operations when a host enters a low power mode, leading to inefficient power management.
Innovation Solution
The storage device reads data units from the host memory buffer before entering low power mode, releases the communication link, executes background operations, and then enters low power mode, minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the storage device executes background operations while the host is in low power mode, then the storage device can maintain data integrity and perform necessary operations, but power consumption increases significantly
Solution Approach 1:
The storage device reads required data from the host memory buffer before the host enters low power mode. This preliminary action ensures that data is available in the buffer for subsequent background operations without requiring the host to remain active, thus maintaining reliability while enabling power savings.
Solution Approach 2:
The host memory buffer serves as an intermediary between the host and storage device. By reading data into this buffer before low power mode, the storage device can perform background operations using the buffered data without requiring continuous host connectivity, resolving the contradiction between maintaining operations and reducing power consumption.
2Productivity
If the storage device maintains communication link with host during background operations, then data can be accessed from host memory buffer, but power consumption increases and host cannot enter low power mode
Solution Approach 1:
The storage device performs preliminary data reading from the host memory buffer before the host enters low power mode. This allows background operations to proceed using pre-loaded data without maintaining an active communication link, enabling both productivity and power savings.
Solution Approach 2:
The necessary data is extracted from the host memory buffer before low power mode engagement. This extraction allows the storage device to operate independently using the extracted data, separating the background operation execution from continuous host communication and thereby reducing power consumption.
3Use of energy by moving object
If the storage device enters low power mode immediately without executing background operations, then power consumption is minimized, but necessary operations may be incomplete
Solution Approach 1:
The storage device executes necessary background operations and reads required data from the host memory buffer before entering low power mode. This preliminary execution ensures operation completion while minimizing subsequent power consumption by avoiding the need to wake from low power mode for additional operations.
Data Source
AI summary
A storage device may read a plurality of data units from a host memory buffer prior to entering a low power mode, release a communication link with the host after reading the plurality of data unit, execute a background operation based on at least one of the plurality of data units, and enter into the low power mode after executing the background operation.