Figure 1-11 Locations And Numbering Of Fans In The Origin200 Server - Silicon Graphics Origin200 Owner's Manual

Air is drawn through the system in the following way:
• Fan 1, directly behind the 5.25-inch peripheral carrier, draws air from the front of
the system through the 5.25-inch peripheral carrier.
• Fans 2 and 3 draw air from a common plenum just behind the SCSI backplane. This
in turn draws air from the front of the system through the 3.5-inch peripherals.
• The lower pressure in the fan plenum behind the SCSI backplane also draws air
from a duct located at the front of the system next to drive 1 to the rear of the PCI
plenum, where it is channeled forward through the PCI plenum, cooling any PCI
boards that are installed.
Figure 1-11 shows the locations and numbering of the fans.
Figure 1-11 Locations and Numbering of Fans in the Origin200 Server
Caution: Because of the way that air is drawn through the PCI plenum, make sure PCI
blanking plates cover any unused PCI slots.
Fan 3
Fan 2
Fan 1
Air Flow and Fans
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