IBM PureFlex System and IBM Flex System Products and Technology

126 IBM PureFlex System and IBM Flex System Products and Technology

򐂰 Connection to the FSM management interface by browser allows remote presence to each

node within the chassis.

򐂰 Connection remotely into the Ethernet management port of the CMM by using the browser

allows remote presence to each node within the chassis.

򐂰 You can also connect directly to each IMM2 on a node and start a remote console session

to that node through the IMM.

4.11.6 Cooling planning

The chassis is designed to operate in temperatures up to 40°c (104°F), in ASHRAE class A3

operating environments.

The airflow requirements for the Enterprise Chassis are from 270 CFM (cubic feet per minute)

to a maximum of 1020 CFM.

The Enterprise Chassis has these environmental specifications:

򐂰 Humidity, non-condensing: -12°C dew point (10.4°F) and 8% - 85% relative humidity

򐂰 Maximum dew point: 24°C (75°F)

򐂰 Maximum elevation: 3050 m (10.006 ft)

򐂰 Maximum rate of temperature change: 5°C/hr (41°F/hr)

Heat Output (approximate):

򐂰 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, use the IBM

Power Configurator tool to establish specific power requirements for a configuration. This tool

can be found at:

http://www.ibm.com/systems/x/hardware/configtools.html

Datacenter operation at environmental temperatures above 35°C would generally be in a free

air cooling environment. This is the expected definition of ASHRAE class A3 (and also the A4

class which raises the upper limit to 45°C). A conventional datacenter would not normally run

with computer room air conditioning (CRAC) units up to 40°C. The risk of either failures of

CRAC or power to the CRACs failing gives limited time for shutdowns before over

temperatures occur. IBM Flex System Enterprise Chassis is suitable for operation in ASHRAE

class A3 environment, installed both operating and non-operating mode.

Information about ASHRAE 2011 thermal guidelines, datacenter classes, and white papers

can be found at the American Society of Heating, Refrigerating, and Air-Conditioning

Engineers (ASHRAE) website at:

http://www.ashrae.org

The chassis can be installed within either IBM or non-IBM racks. However, the IBM 42U 1100

mm Enterprise V2 Dynamic Rack does offer in North America a single floor tile wide and two

tiles deep. More information about this sizing is detailed in 4.12, “IBM 42U 1100 mm

Enterprise V2 Dynamic Rack” on page 128.

If installed within a non-IBM rack, the vertical rails must have clearances to EIA-310-D. There

must be sufficient room in front of the vertical front rack mounting rail to provide minimum

bezel clearance of 70 mm (2.76 inches) depth. The rack must be sufficient to support the

weight of the chassis, cables, power supplies, and other items installed within. There must be