HP ProLiant DL385 User Manual page 47

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Leave a minimum clearance of 76.2 cm (30 in) behind the rack.
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Leave a minimum clearance of 121.9 cm (48 in) from the back of the rack to
the back of another rack or row of racks.
HP servers draw in cool air through the front door and expel warm air through
the rear door. Therefore, the front and rear rack doors must be adequately
ventilated to allow ambient room air to enter the cabinet, and the rear door must
be adequately ventilated to allow the warm air to escape from the cabinet.
CAUTION: To prevent improper cooling and damage to the
equipment, do not block the ventilation openings.
When vertical space in the rack is not filled by a server or rack component, the
gaps between the components cause changes in airflow through the rack and
across the servers. Cover all gaps with blanking panels to maintain proper
airflow.
CAUTION: Always use blanking panels to fill empty vertical
spaces in the rack. This arrangement ensures proper airflow. Using a
rack without blanking panels results in improper cooling that can lead to
thermal damage.
The HP 9000 and 10000 Series Racks provide proper server cooling from flow-
through perforations in the front and rear doors that provide 64 percent open area
for ventilation.
CAUTION: When using a Compaq branded 7000 Series rack,
you must install the high airflow rack door insert [P/N 327281-B21 (42U)
or P/N 157847-B21 (22U)] to provide proper front-to-back airflow and
cooling.
IMPORTANT: The ProLiant DL380 G4 server cable management arm
is not supported on Compaq branded 7000 series racks.
CAUTION: If a third-party rack is used, observe the following
additional requirements to ensure adequate airflow and to prevent
damage to the equipment:
Server setup 47