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Chapter 3
Maintaining the System
Table 3-1
Front-Panel LEDs States (continued)
LED Name
3
System status
4
Fan status
5
Temperature status
6
Power supply status
7
Network link activity
8
Internal-drive status LEDs
OL-32062-01
State
Green—The system is running in normal operating condition.
•
Green, blinking—The system is performing system initialization and memory
•
check.
Amber, steady—The system is in a degraded operational state. For example:
•
Power supply redundancy is lost.
–
CPUs are mismatched.
–
At least one CPU is faulty.
–
At least one DIMM is faulty.
–
At least one drive in a RAID configuration failed.
–
Amber, blinking—The system is in a critical fault state. For example:
•
Boot failed.
–
–
Fatal CPU and/or bus error is detected.
–
System is in an over-temperature condition.
Green—All fan modules are operating properly.
•
Amber, steady—One fan module has failed.
•
Amber, blinking—Critical fault; two or more fan modules have failed.
•
Green—The system is operating at normal temperature.
•
Amber, steady—One or more temperature sensors have exceeded a warning
•
threshold.
Amber, blinking—One or more temperature sensors have exceeded a critical
•
threshold.
Green—All power supplies are operating normally.
•
Amber, steady—One or more power supplies are in a degraded operational state.
•
Amber, blinking—One or more power supplies are in a critical fault state.
•
•
Off—The Ethernet link is idle.
Green—One or more Ethernet LOM ports are link-active.
•
Green, blinking—One or more Ethernet LOM ports are traffic-active.
•
Use these LEDs to indicate the location of a failing drive. Then open the system cover
to find exactly which drive is failing by looking at the LEDs on the drive trays.
The two columns of LEDs correspond to the two halves of the internal drive
•
compartment (under either the right- or left-side top cover).
The four numbered rows of LEDs correspond to the four horizontal rows of drive
•
bays (14 drive bays in each row).
See
Figure 3-9
for an example. In this example, the red LED indicates that the failing
drive is in the right half of the internal drive compartment, in row 3.
Cisco UCS C3160 Rack Server Installation and Service Guide
Status LEDs and Buttons
3-3
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