Storage Device Power State Management via Logical Volume Access Monitoring
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Solution Overview
Problem
The high energy consumption and thermal dissipation of continuous operation of external storage devices in data centers lead to undesired operating conditions, necessitating a method to reduce power states of storage devices without compromising data access efficiency.
Innovation Solution
A system and method that detect access requests to logical volumes, determine associations with storage devices, and alter their operating states by placing non-active devices in reduced power modes when not accessed for a specified interval, using a logical volume manager and I/O interface to manage power states and conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If storage devices are continuously operated to maintain data access efficiency, then data access speed is improved, but power consumption and thermal dissipation increase
Solution Approach 1:
The system dynamically adjusts the operational state of storage devices based on real-time access patterns. When a storage device is determined to be associated with multiple logical volumes and no access requests are detected for a specified interval, the system transitions the device from an active state to a reduced power state, optimizing energy consumption while maintaining data accessibility.
Solution Approach 2:
The system changes the operational parameters of storage devices by altering their power states. By monitoring access intervals and determining device associations with logical volumes, the system transitions devices between full power and reduced power states, thereby adjusting energy consumption parameters while preserving data access capabilities.
2Use of energy by moving object
If storage devices are placed in reduced power states to conserve energy, then power consumption is reduced, but data access efficiency may be compromised
Solution Approach 1:
The system performs preliminary assessment of storage device associations with multiple logical volumes before transitioning to reduced power states. By determining device associations in advance and monitoring access patterns over specified intervals, the system ensures that devices can be safely placed in low-power states without compromising future data access efficiency.
Solution Approach 2:
The system implements a feedback mechanism that continuously monitors access requests to logical volumes and adjusts storage device power states accordingly. When access requests are detected during the monitoring interval, the system transitions devices back to active states, ensuring data access efficiency is maintained while optimizing energy consumption during idle periods.
Data Source
AI summary
A system, method, and module for reducing power states for storage devices and associated logical volumes are disclosed. In one form, a method of altering an operating state of a storage device can include detecting a request to access a first logical volume over an interval. The method can also include determining an association of a storage device to the first logical volume. The method can further include determining if the storage device is operably associated with a second logical volume, and altering an operating state of the storage device in response to detecting the request and determining the association with the second logical volume.