ASROCK 4U4G Series User Manual page 13

Status LED Definitions
Power LED
Status Description
Green Power on
Off Power off
ID LED
Status Description
Blue System identification is active.
Off System identification is disabled.
LAN1, LAN2, LAN3, LAN4 LEDs
Status Description
Green Link between system and network or no access
Blinking Green Network access
HDD Activity LED
Status Description
Blinking Green HDD access
Off HDD idle
System Event LED
Status Description
Off Running or normal operation
Red At least one sensor has critical alert
4U4G Series
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