IBM AA-RWF3A-TE - Manual (Page 39)

IMPORTANT:
The 40 ºC value applies to the ambient air temperature at the air intake vents on the
nonport side of the switch. The temperature inside the switch can be up to 80 ºC (176
ºF) during switch operation. If the internal temperature range exceeds the operating
ranges of the components, the LEDs, error messages, and Fabric Watch alerts indicate
a problem. Enter the tempshow or Fabric Watch command to view temperature
status.
NOTE:
For a complete list of environmental considerations, see Table 25 on page 136.
Rack specifications
If you are installing the switch in a rack:
• Plan a rack space that is one rack unit (4.45 cm or 1.75 in) high, 48.3 cm (19
in) wide, and at least 76.2 cm (30 in) deep.
• Verify that the rack is mechanically secured to ensure stability in the event of an
earthquake or other natural disaster.
• Ground all equipment in the rack through a reliable branch circuit connection;
maintain the ground at all times. Do not rely on a secondary connection to a
branch circuit, such as a power strip.
• Ensure that airflow and temperature requirements are met on an ongoing basis,
especially if the switch is installed in a closed or multi-rack assembly.
• Verify that the additional weight of the switch does not exceed the rack’s weight
limits or unbalance the rack in any way.
Cooling considerations
Cooling air is drawn into the switch chassis by the fans mounted on the rear of the
chassis. The air is expelled through vents in the front (port side) of the chassis. HP
recommends installing the switch so that air intake and exhaust for all components in
the rack are flowing in the same front-to-back direction.
Follow these guidelines to ensure proper airflow and to prevent component overheating:
• Install the switch with the nonport side (which contains the air intake vents) facing
the cool-air aisle.
• Ensure that all equipment in the rack forces air in the same direction to avoid
taking in exhaust air.
• Ensure that a minimum of 24 cu ft/min of airflow is available to the air intake
vents on the nonport side of the switch.
SAN Switch installation guide 39