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4939H29
8068ch01-Intro.fm
Draft Document for Review January 29, 2013 12:52 pm
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IBM Flex System V7000 Storage Node Introduction and Implementation Guide
An IBM Flex System Enterprise Chassis would typically be connected to at least two power
distribution units (PDU) in a computer room with the PSUs connected evenly across the
PDUs. With ‘N+N’ redundancy the IBM Flex System Enterprise Chassis in this configuration
is also protected against PDU failure within the computer room.
distribution units (PDU) in a computer room with the PSUs connected evenly across the
PDUs. With ‘N+N’ redundancy the IBM Flex System Enterprise Chassis in this configuration
is also protected against PDU failure within the computer room.
1.3.2 Fan modules and cooling
The Enterprise Chassis supports up to ten hot pluggable fan modules consisting of two 40mm
fan modules and eight 80mm fan modules.
fan modules and eight 80mm fan modules.
A chassis can operate with a minimum of six hot-swap fan modules installed, consisting of
four 80mm fan modules and two 40mm fan modules. The fan modules plug into the chassis
and connect to the fan distribution cards. The 80mm fan modules may be added as required
to support chassis cooling requirements.
four 80mm fan modules and two 40mm fan modules. The fan modules plug into the chassis
and connect to the fan distribution cards. The 80mm fan modules may be added as required
to support chassis cooling requirements.
The two 40 mm fan modules in fan bays 5 and 10 (top two) distribute airflow to the I/O
modules and chassis management modules. These modules ship pre installed in the chassis.
modules and chassis management modules. These modules ship pre installed in the chassis.
Each 40mm fan module contains two 40mm fans internally, side by side.
The 80 mm fan modules distribute airflow to the compute nodes through the chassis from
front to rear. Each 80mm fan module contains two 80mm fan modules, back to back at each
end of the module, which are counter rotating.
front to rear. Each 80mm fan module contains two 80mm fan modules, back to back at each
end of the module, which are counter rotating.
Both fan modules have an EMC (electromagnetic compatibility) mesh screen on the rear
internal face of the module. The design of this also has an additional benefit for the airflow, by
providing a laminar flow through the screen, which reduces turbulence of the exhaust air and
improves the efficiency of the overall fan assembly. Laminar flow is a smooth flow of air,
sometimes called streamline flow. The opposite of a laminar flow is a turbulent flow. The
design of the whole fan assembly, the fan blade design, the distance between and size of the
fan modules together with the EMC mesh screen ensures a highly efficient fan design that
provides the best cooling for lowest energy input.
internal face of the module. The design of this also has an additional benefit for the airflow, by
providing a laminar flow through the screen, which reduces turbulence of the exhaust air and
improves the efficiency of the overall fan assembly. Laminar flow is a smooth flow of air,
sometimes called streamline flow. The opposite of a laminar flow is a turbulent flow. The
design of the whole fan assembly, the fan blade design, the distance between and size of the
fan modules together with the EMC mesh screen ensures a highly efficient fan design that
provides the best cooling for lowest energy input.
The minimum number of 80mm fan modules is four. The maximum number of 80mm fan
modules that may be installed is eight. When the modules are ordered as an option, they are
supplied as a pair.
modules that may be installed is eight. When the modules are ordered as an option, they are
supplied as a pair.
Environmental Specifications
The chassis is designed to operate in temperatures up to 40°c (104°F), in ASHRAE class A3
operating environments.
operating environments.
The airflow requirements for the Enterprise Chassis are from 270 CFM (cubic feet per minute)
to a maximum of 1020 CFM.
to a maximum of 1020 CFM.
Environmental Specifications are:
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Humidity, non-condensing: -12°C dew point (10.4°F) and 8% - 85% relative humidity
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Maximum dew point: 24°C (75°F)
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Maximum elevation: 3050 m (10.006 ft)
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Maximum rate of temperature change: 5°C/hr (41°F/hr)
Heat Output (approximate):
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Maximum configuration: potentially 12.9kW
The 12.9kW figure is only a potential maximum, where the most power hungry configuration
is chosen and all power envelopes are maximum. For a more realistic figure, the IBM Power
is chosen and all power envelopes are maximum. For a more realistic figure, the IBM Power