Configuring Airflow Direction On Wwn Cards; Removing And Installing Wwn Cards - IBM SAN512B-6 Installation, Service And User Manual

Figure 44. Removing and installing WWN cards
4. Depending on the WWN card assembly removed, label the assembly with #1
5. Set the WWN card assembly on a static-free surface, such as a grounding pad.

Configuring airflow direction on WWN cards

About this task
All fan and power supply assemblies installed in the chassis must provide the
same airflow direction, either nonport-side intake (NPI) or nonport-side exhaust
(NPE). In a factory-configured system, this airflow direction will match the airflow
direction configured for the chassis on the installed WWN cards.
A mismatch of between system and fan and power supply airflow direction may
occur when installing new WWN cards into an existing chassis with fan and
power supply assemblies already installed or when installing fan and power
supply assemblies into a replacement chassis. Replacement chassis are shipped
with new WWN cards installed, and airflow direction is not configured on these
cards.
The system detects airflow direction of the chassis at system boot based on airflow
direction of installed power supply and fan assemblies. Normally, if there is a
mismatch between airflow direction set on WWN cards and airflow direction of
the installed fan and power supply assemblies, the system will automatically
configure the established airflow direction on the WWN cards, provided all
installed fan and power supply assemblies have the same airflow direction.
RASLOG messages such as the following will occur during this automatic
configuration:
1 - WWN card 1
2 - WWN card 2
3 - WWN card bezel
for the left-side assembly and #2 for the right-side assembly for future
reference.
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Chapter 10. WWN Cards