3-2
Cisco UCS C420 Server Installation and Service Guide
OL-27640-01
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:
•
Front-Panel LEDs, page 3-2
•
Rear-Panel LEDs and Buttons, page 3-4
•
Internal Diagnostic LEDs, page 3-7
Front-Panel LEDs
Figure 3-1
shows the front-panel LEDs.
Table 3-1 on page 3-3
defines the front-panel LED states.
Figure 3-1
Front-Panel LEDs
1
Hard drive fault LED
6
Fan status LED
2
Hard drive activity LED
7
Temperature status LED
3
Power button and Power status LED
8
Power supply status LED
4
Identification button and LED
9
Network link activity LED
5
System status LED
334350
HDD 1
HDD 2
HDD 3
HDD 4
HDD 5
HDD 6
HDD 7
HDD 8
HDD 9
HDD 10
HDD 11
HDD 12
HDD 13
HDD 14
HDD 15
HDD 16
1
2
3
4
5
6
7
8
9