HDD LED, abbreviated for Hard Disk Drive Activity Light, is a compact indicator light commonly found on desktop computer cases. It visually signals when the internal hard drive or SSD performs read/write operations.
Core Function
The HDD LED illuminates or blinks whenever data transfers occur, indicating active storage activity such as file access or background processes.
Simple Working Principle
The LED connects directly to the motherboard via standardized pins:
- Motherboard sends voltage signals based on drive controller activity.
- Current flow activates the LED, creating the flashing effect during read/write cycles.
- This provides real-time visual feedback without user intervention.
Ultimately, HDD LED simplifies performance monitoring by using basic circuitry for immediate system insight.
