IBM SAN256B-6 Installation, Service And User Manual page 187

[HIL-1630], 449, SLOT 1 CHASSIS, INFO, chassis1, Auto-configuring
system airflow direction to Non-portside Intake
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 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:
2. To reconfigure airflow direction on installed WWN cards, enter wwnrecover.
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
3. Enter 1 when prompted for a recover option to copy airflow direction from the fan to both WWN
cards.
Enter Selection > 1
WWN Airflow direction recovery complete.
Please reboot the system.
4. Reboot the system.
AC
Non-portside Intake
Non-portside Intake
Non-portside Exhaust
Non-portside Exhaust
159
WWN Cards