Installation guide

Field Replaceable Units (FRUs)
The power supplies have the fans inside and can be replaced onsite without the use of special tools.
The power supply/fan assembly units are keyed to ensure correct orientation during installation.
Replacement instructions are provided with all replacement units ordered.
Power supply/fan assembly FRU replacement
The Brocade 5100 fans are fixed inside the integrated power supply/fan FRU to provide necessary
airflow to cool the whole system. There is one fan located in the rear section of each FRU. The system
software sets fan speed and measures their speeds through the tachometer interface.
The two power supply/fan assembly FRU units are hot-swappable if replaced one at a time. They are
identical and fit into either slot.
Fabric OS identifies the power supplies as follows (viewing the switch from the port side):
• Power supply #1 is on the left
• Power supply #2 is on the right
Determining power supply/fan replacement need
1. Use one of the following methods to determine whether a power supply requires replacement:
• Check the power supply status LED next to the I/O switch. If the power supply status LED is not
on, verify that the power supply is on and seated and the power cord is connected to a functioning
power source. If the light does not turn green, the power supply needs to be replaced.
• In Web Tools, click the Power Status icon.
• Type the psShow command at the command prompt to display power supply status as shown
below:
switch:admin> psshow
Power Supply #1 is OK
Power Supply #2 is OK
2. Use one of the following methods to determine whether a fan requires replacement:
• Check the system status LED (see LED locations section for location of system status LED). If the
system status LED is flashing amber and green, it could mean the fan has failed. The green power
supply/fan LED will also flash in the event of failure. Check the management interface and the
error log for details on the cause of status.
• In Advanced Web Tools, check the Fan Status icon background color. It will be either yellow or
red if the fan has failed. When the fan is functioning correctly, the background color is green.
• Type the fanShow command at the command prompt to display fan status as shown below:
switch:admin> fanshow
Fan 1 is OK, speed is 7105 RPM
Fan 2 is OK, speed is 7258 RPM
For further information on replacing the power/fan units, see the Brocade 5100 Power Supply and
Fan Assembly Replacement Procedure .
Field Replaceable Units (FRUs)
Brocade 5100 Hardware Installation Guide 33
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