NonStop NS1000 Planning Guide (H06.05+)

Installation Facility Guidelines

HP Integrity NonStop NS1000 Planning Guide—542527-004

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Power Cables for European Union

If your site is in one of the European Union (EU) countries or in an area that complies

with EU regulations, you can order modular cabinets with PDU power cables

specifically manufactured and color coded for use in the EU. These are often called

harmonized cables and comply with color coding and materials standards different

from those used in North America and Japan.

Cooling and Humidity Control

Do not rely on an intuitive approach to cooling design or to simply achieve an energy

balance—that is, summing up to the total power dissipation from all the hardware and

sizing a comparable air conditioning capacity. Today’s high-performance servers use

semiconductors that integrate multiple functions on a single chip with very high power

densities. These chips plus high-power-density mass storage and power supplies are

mounted in ultra-thin server and storage enclosures, which are then deployed into

computer racks in large numbers. This higher concentration of devices results in

localized heat, which increases the potential for hot spots that can damage the

equipment.

Additionally, variables in the installation site layout can adversely affect air flows and

create hot spots by allowing hot and cool air streams to mix. Studies have shown that

above 70°F (20°C), every increase of 18°F (10°C) reduces long-term electronics

reliability by 50%.

Cooling airflow through each enclosure in the Integrity NonStop NS1000 server is

front-to-back. Because of high heat densities and hot spots, an accurate assessment

of air flow around and through the server equipment and specialized cooling design is

essential for reliable server operation. For an airflow assessment, consult with your HP

cooling consultant or your heating, ventilation, and air conditioning (HVAC) engineer.

Because each modular cabinet houses a unique combination of enclosures, use the

Heat Dissipation Specifications and Worksheet on page 3-8 to calculate the total heat

dissipation for the hardware installed in each cabinet. For air temperature levels at the

site, refer to Operating Temperature, Humidity, and Altitude on page 3-8.

Weight

Because modular cabinets for Integrity NonStop NS1000 servers house a unique

combination of enclosures, total weight must be calculated based on what is in the

specific cabinet, as described in Modular Cabinet and Enclosure Weights With

Worksheet on page 3-7.

Note. Failure of site cooling with the server continuing to run can cause rapid heat buildup and

excessive temperatures within the hardware. Excessive internal temperatures can result in full

or partial system shutdown. Ensure that the site’s cooling system remains fully operational

when the server is running.