Troubleshooting Server Subsystems
Cooling Fan Power
Power for the internal PSU cooling fans (zone 0) is provided by the PSUs. Power for the fan
modules (zones 1-4) is supplied by CMOD0, CMOD2, CMOD4, and CMOD6.
■
The chassis cooling fans operate only when the chassis is in main power mode (see
Control, Shutdown, and Reset States” on page 118
).
■
The PSU fans operate when the system is in Main power or standby power mode.
The following table lists the CMODs and the fan modules to which they supply power.
CMOD
Fan Modules Powered
CMOD0
FM0 and FM1
CMOD2
FM2 and FM3
CMOD4
FM4 and FM5
CMOD6
FM6 and FM7
Note -
The fan power connectors for CMODs in slots 1, 3, 5, and 7 are not used.
Fan Module Redundancy
The eight fan modules (FMs) provide airflow for chassis cooling zones 1-4. For redundancy,
each zone has two dedicated FMs. Replace a failed fan module immediately. The FMs are hot-
serviceable.
Caution -
Data Loss. Do not remove more than one fan module from a column while the system
is in Main power mode. This action removes power from the CMODs and causes an immediate
shutdown. On an eight-CMOD system, this applies to all fan modules. On a four-CMOD
system, this applies to the fan modules in the left-hand fan frame.
For FM reference and servicing information, see
“Servicing Fan Modules (CRU) and Fan
Storage Subsystem
Use the Oracle Integrated Lights Out Manager (ILOM) Storage page to view tables listing
health and inventory information for storage devices detected on your server.
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Oracle Server X7-8 Service Manual • October 2017
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