RM23712 TPS
46
With the system operating, the air duct must be installed at all times
In single power supply configurations, the 2nd power supply bay must have the supplied filler
blank installed at all times.
Some system configurations require that dual power supplies be installed for the system to
support fan redundancy. See Appendix D for supported thermal configuration data.
System fan redundancy is not supported with systems operating at ASHRAE A3 or A4 thermal
limits
Termally, a system supporting fan redundancy can support the following PCI add-in cards when
the system is operating at a maximum external ambient temperature of 35°C(ASHRAE Class
2).
System Configuration – Storage Models - 12 x 3.5” front drive bay configurations
Add-in cards with a minimum 100 LFM (0.5 m/s) air flow requirement can be
installed in any available add-in card slot in Riser Card #1, Riser Card #2, and
Riser Card #3
Add-in cards with a minimum 200 LFM (1 m/s) air flow requirement can be
installed in any available add-in card slot on Riser Card #2 and the bottom add-in
card slot on Riser Card #1. Middle and Top add-in card slots on Riser Card #1
cannot support PCI add-in cards with air flow requirements greater than 100 LFM.
Add-in cards with an air flow requirement greater than 200 LFM cannot be
supported in any PCIe* slot on any riser
。 Note: Most PCI add-in cards have minimum air flow requirements of 100 LFM (0.5m/s).
Some high power add-in cards have minimum air flow requirements of 300 LFM (1.5 m/s)
or higher. System integrators should verify PCI add-in card air flow requirements from
vendor specifications when integrating add-in cards into the system.
The system top-cover must be installed at all times when the system is in operation. The only
exception to this requirement is to hot replace a failed system fan, in which case the top cover
can be removed for no more than 3 minutes at a time.
4.2 Thermal Management Overview
In order to maintain the necessary airflow within the system, all of the previously listed components
need to be properly installed. For best system performance, the external ambient temperature
should remain below 35°C and all system fans (all rotors) should be operational.
For system configurations that support fan redundancy, should a single fan failure occur (System
fan or Power Supply Fan), integrated platform management will: change the state of the System
Status LED to flashing Green, report an error to the system event log, and automatically adjust fan
speeds as needed to maintain system temperatures below maximum thermal limits.
NOTE: All system fans are controlled independent of each other. The fan control system may adjust
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