IBM SAN512B-6 Installation, Service And User Manual page 182

...[HIL-1630], 449, SLOT 1 CHASSIS, INFO, chassis1, Auto-configuring
system airflow direction to Non-portside Exhaust
[HIL-1630], 449, SLOT 1 CHASSIS, INFO, chassis1, Auto-configuring
If airflow direction for power supply and fan assemblies does not match, WWN
cards will not automatically reconfigure and the fan or power supply assembly
with mismatched airflow will fault. In this case, you must replace fan or power
supply assemblies to achieve matching airflow direction for all, and then reboot
the system.
The following procedure is provided if you need to manually synchronize airflow
direction on WWN cards with airflow direction of installed fan and power supply
assemblies.
Note: Changing chassis airflow is only supported to synchronize established
airflow direction of installed fan and power supply assemblies with airflow
direction configured on WWN cards. Changing airflow direction from NPI to NPE
or NPE to NPI is not supported in a customer environment.
Procedure
1. Enter chassisShow to display airflow direction programmed in WWN cards and
2. To reconfigure airflow direction on installed WWN cards, enter wwnrecover.
3. Enter 1 when prompted for a recover option to copy airflow direction from the
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SAN512B-6 Installation, Service, and User Guide
system airflow direction to Non-portside Intake
airflow direction of installed fan and power supply FRUs. Airflow direction of
fans and power supplies displays as "Fan Direction" under each fan or power
supply unit. System airflow direction displays as "System Airflow" under the
WWN card unit. The following example shows mismatch of system airflow and
airflow direction in installed fan and power supply as the WWN units should
indicate "Non-portside Intake."
POWER SUPPLY Unit: 1
Power Source:
Fan Direction:
...
FAN Unit: 2
Fan Direction:
...
WWN Unit: 1
System AirFlow:
...
WWN Unit: 2
System AirFlow:
sw0:admin> wwnrecover
WWN 1 and/or WWN 2 system airflow direction mismatches with the
installed fan FRU's airflow direction.
WWN Non-Critical Seeprom Problem Details
WWN 1 system airflow direction mismatches with installed Fan FRU's
airflow direction!!!!
WWN 2 system airflow direction mismatches with installed Fan FRU's
airflow direction!!!!
Recovery Options
0. Exit
1. Copy Airflow direction from Fan FRU to both WWN cards
fan to both WWN cards.
AC
Non-portside Intake
Non-portside Intake
Non-portside Exhaust
Non-portside Exhaust