PowerConnect B-8000 Hardware Reference Manual
19
53-1001788-01
POST and boot specifications
3
POST and boot specifications
When the switch is turned on or rebooted, the switch performs POST. Total boot time with POST can
be several minutes. POST can be omitted after subsequent reboots by using the fastboot command
or entering the diagDisablePost command to persistently disable POST.
For more information about these commands, refer to the
Fabric OS Command Reference Manual
.
POST
The success or failure results of the diagnostic tests that run during POST can be monitored
through LED activity, the error log, or the command line interface.
POST includes the following tasks:
1. Conducts preliminary POST diagnostics.
2. Initializes the operating system.
3. Initializes hardware.
4. Runs diagnostic tests on several functions, including circuitry, port functionality, memory,
statistics counters, and serialization.
Boot
In addition to POST, boot includes the following tasks after POST is complete:
1. Performs universal port configuration.
2. Initializes links.
3. Analyzes fabric. If any ports are connected to other switches, the switch participates in a fabric
configuration.
4. Obtains a domain ID and assigns port addresses.
Fan Status
No light
Fan assembly is not receiving
power.
Try the following:
Verify the fan FRU is seated correctly.
Verify the switch is powered on.
Steady green
Fan assembly is operating
normally.
No action required.
Steady amber (for
more than 5
seconds)
Fan fault for one of the following
reasons:
One or more of the fan(s) in the
fan assembly has failed
The fan FRU was disabled by the
user
Note: When the switch is first
powered on the fan status LED
will show amber until POST has
completed.
Try the following:
Verify the fan FRU is enabled (use the
fanEnable command).
Replace the fan FRU.
TABLE 2
Non-port side LED patterns during normal operation (Continued)
LED name
LED color
Status of hardware
Recommended action
