• Red—Port-side intake airflow
• Blue—Port-side exhaust airflow
The switch supports PSUs of only one airflow type at a time. Both PSUs have to be either port-side
exhaust, or port-side intake PSUs.
Note: The direction of PSU airflow must match the direction of the fan module airflow.
For more information on installing and removing PSUs, see Installing and Removing Power Supplies.
LEDs
The IBM SAN48C-6 switch has LEDs on both the front and back of the switch to indicate the status of
different system components during boot-up tests and online operation. The following tables describe the
location of each LED and the meaning of its color:
Table 2. Chassis Activity LEDs for a IBM SAN48C-6 Switch
Indicator Location Function Color Status State
Power LED Front panel of
the chassis
Chassis Power/
Health
Off Off Either of the following
conditions exists:
• The system is not
receiving sufcient power
from the PSUs.
• The operating system is
not running.
Green Solid On Both PSUs are installed and
operational.
Red Solid On Either of the following
conditions exists:
• A PSU has failed.
• A PSU has been removed.
Chapter 1. Overview of the IBM SAN48C-6 Fibre Channel Switch 5
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