Estimating The Total Weight Of A Custom Or Modular Installation - HP Cluster Platform Introduction v2010 Introduction Manual

The following considerations also apply when planning for an HP Cluster Platform:
• The cluster's layout configuration. The layout of a cluster is determined by cable length
limits and the cluster layout is generally established and fixed during the process of ordering
a cluster. After delivery, you cannot reorganize a cluster's layout to facilitate cooling.
• Some cluster models that use parallel copper cables have large bundles of cables that emerge
from the bottom of the rack. You must plan to route these cables so that you can avoid air
dams at air ventilation outlets and inlets. For cooling systems that employ pressurized
plenums, consider solutions that enable you to route cables without causing large gaps
where cable bundles pass through the plenum. (Some air handling systems provide sealed
cable pass-throughs).
• Location of the cluster and clearances for airflow depends on the cooling methods used at
the site. For example, an underfloor plenum might enable you to duct cooled air directly
under the system racks for maximum efficiency.
• HP rack-mountable products typically draw in cool air through the front of the rack and
exhaust warm air through the rear of the rack. The front door of the rack, therefore, must
be adequately ventilated to allow ambient room air to enter the rack, and the rear door must
be adequately ventilated to allow the warm air to escape. Do not block the ventilation
apertures. The rack does not include supplemental cooling fans to draw air through the
rack, and such options are not available.
• Never remove any preinstalled blanking panels and baffles unless you are using the space
to install a supported upgrade component, such as a server or switch. These panels are
needed to maintain airflow within the rack.
• You cannot utilize any unused rack space. Never add any components that are not part of
a supported upgrade. In particular, do not install any third-party components or even HP
components that are not supported as cluster upgrades. Such unsupported installations
might cause serious overheating problems.

1.5.5 Estimating the Total Weight of a Custom or Modular Installation

You might need to determine the total weight of custom configurations if any of the following
considerations apply:
• Variations in flooring support when moving the cluster during installation
• Trucking equipment limits
• Raised floor installation (calculating load limits and reinforcement)
• Secondary or tertiary floor installation.
Following are several ways to determine the weight and floor load requirements for the purpose
of site planning:
• Capacity planning: Assume that the rack will eventually be laden to its 907.18 kg (2000 lb)
capacity.
• To obtain an approximation for planning, you can use the worksheet supplied in
for each rack in the configuration. You also need to obtain weight figures for any planned
storage by referring to the technical specifications for the storage model. For example, if you
choose the EVA 4000 storage, see the following HP StorageWorks Web site:
http://h18006.www1.hp.com/products/storageworks/eva/index.html
Choose the Quickspecs for your region.
You must add the weight of any components that are not included in the list of rack options.
To obtain the weight of any individual component, use the following procedure:
1. Go to the HP documentation Web site at http://docs.hp.com/.
2. Enter the component model number, such as ProLiant DL380 in the Search box.
3. Find the component's installation guide in the list of documents.
26 Installation Planning
Table 1-10