User's Manual

8 Chapter 1: Overview
1.5.3 LED Definition
Front Panel
Rear I/O LED
LED Color State Description
Power Green
OFF
ON
OFF
Power ON
Power OFF
HDD Activity Amber
OFF
Blinking
OFF
HDD access activity
No disk activity
LAN1/LAN2 Activity Green
Green
OFF
ON
Blinking
OFF
LAN connected
LAN access activity
LAN disconnected
Warning Reserved LED for future upgrade. It is not functional in
the B2891 barebone now.
Hot Swappable HDD
Tray Power LED
Green
OFF
ON
OFF
Power connected
Power disconnected
Hot Swappable
HDD Tray Access
LED (U4H only)
Amber
OFF
Blinking
OFF
HDD access activity
No disk activity
LED Color State Description
RJ45 NIC1 Linkage
(Left Side)
Green
Green
OFF
ON
Blinking
OFF
LAN linked
LAN accessing
No LAN linked
RJ45 NIC1 Mode
(Right Side)
Amber
Green
OFF
ON
ON
OFF
Gigabit mode
100M mode
10M mode
RJ45 NIC2 Linkage
(Left Side)
Green
Green
OFF
ON
Blinking
OFF
LAN linked
LAN accessing
No LAN linked
RJ45 NIC2 Mode
(Right Side)
Amber
Green
OFF
ON
ON
OFF
Gigabit mode
100M mode
10M mode