Oracle X8-8, Installation Manual

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Ventilation and Cooling Requirements
Ventilation and Cooling Requirements
Always provide adequate space in front of and behind the rack to allow for proper ventilation
of rackmounted servers. Do not obstruct the front or back of the rack with equipment or objects
that might prevent air from flowing through the rack. Rackmountable servers and equipment,
including Oracle Server X8-8, draw cool air in through the front of the rack and release warm
air out the back of the rack. There is no airflow requirement for the left and right sides due to
front-to-back cooling.
If the rack is not completely filled with components, then cover the empty sections with filler
panels. Gaps between components can adversely affect airflow and cooling in the rack.
The servers function while installed in a natural convection airflow. Follow these environmental
specifications for optimal ventilation:
■
Ensure that air intake is in the front of the system, and the air outlet is in the back. Take care
to prevent recirculation of exhaust air in a rack or cabinet.
■
Allow minimum clearance of 123.2 cm (48.5 inches) in the front of the system, and 91.4 cm
(36 inches) in the back.
■
Ensure that airflow is unobstructed through the chassis. Oracle Server X8-8 uses internal
fans that can achieve 100 CFM, within the specified range of operating conditions.
■
Ensure that ventilation openings, such as cabinet doors for both the inlet and exhaust of the
server, are unobstructed. For example, Oracle Rack Cabinet 1242 is optimized for cooling.
Both the front and back doors have 80 percent perforations that provide a high level of
airflow through the rack.
■
Ensure that front and back clearances between the cabinet doors is a minimum of 2.5 cm
(1 inch) at the front of the server and 8 cm (3.15 inches) at the back of the server when
mounted. To improve cooling performance, these clearance values are based on the inlet and
exhaust impedance (available open area) and assume a uniform distribution of the open area
across the inlet and exhaust areas.
Note -
The combination of inlet and exhaust restrictions, such as cabinet doors and the
distance of the server from the doors, can affect the cooling performance of the server.
You must evaluate these restrictions. Server placement is particularly important for high-
temperature environments.
■
Manage cables to minimize interference with the server exhaust vent.
Preparing for Server Installation 17