3-2
Cisco UCS C220 M4 Server Installation and Service Guide
OL-32473-01
Chapter 3 Maintaining the Server
Status LEDs and Buttons
Status LEDs and Buttons
This section describes the location and meaning of LEDs and buttons and includes the following topics
•
•
Rear Panel LEDs and Buttons, page 3-5
•
Internal Diagnostic LEDs, page 3-7
Front Panel LEDs
shows the front panel LEDs.
defines the LED states.
Figure 3-1
Front Panel LEDs
1
Hard drive fault LED
Note:
NVMe PCIe SSDs drive tray LEDs
have slightly different behavior. See
for the LED states.
6
Fan status LED
2
Hard drive activity LED
7
Temperature status LED
3
Power button/power status LED
8
Power supply status LED
4
Identification button/LED
9
Network link activity LED
5
System status LED
353088
9
7
5
3
4
6
8
BAY 02
BAY 01
BAY 03
BAY 04
BAY 05
BAY 06
BAY 08
BAY 07
2
1