NonStop NS16000 Series Planning Guide (H06.11+)

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.
Because each modular cabinet houses a unique combination of enclosures, use the “Heat Dissipation
Specifications and Worksheet” (page 60) 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” (page 61).
Weight
Modular cabinets for Integrity NonStop NS16000 series servers have a foot print and height
comparable to NonStop S-series servers with stacked enclosures. But each populated modular
cabinet in Integrity NonStop NS16000 series servers can be more than twice as heavy as a
NonStop S-series server stack. Because each modular cabinet houses 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” (page 59).
Flooring
Integrity NonStop NS16000 series servers can be installed either on the site’s floor with the cables
entering from above the equipment or on raised flooring with power and I/O cables entering from
underneath. Because cooling airflow through each enclosure in the modular cabinets is front-to-back,
raised flooring is not required for system cooling.
The site floor structure and any raised flooring (if used) must be able to support the total weight of
the installed computer system as well as the weight of the individual modular cabinets and their
enclosures as they are moved into position. To determine the total weight of each modular cabinet
with its installed enclosures, refer to “Modular Cabinet and Enclosure Weights With Worksheet”
(page 59).
For your site’s floor system, consult with your HP site preparation specialist or an appropriate floor
system engineer. If raised flooring is to be used, the design of the Integrity NonStop NS16000
series modular cabinet is optimized for placement on 24-inch floor panels.
Dust and Pollution Control
NonStop servers do not have air filters. Any computer equipment can be adversely affected by
dust and microscopic particles in the site environment. Airborne dust can blanket electronic
components on printed circuit boards inhibiting cooling airflow and causing premature failure from
excess heat, humidity, or both. Metallically conductive particles can short circuit electronic
components. Tape drives and some other mechanical devices can experience failures resulting
from airborne abrasive particles.
For recommendations to keep the site as free of dust and pollution as possible, consult with your
heating, ventilation, and air conditioning (HVAC) engineer or your HP site preparation specialist.
Zinc Particulates
Over time, fine whiskers of pure metal can form on electroplated zinc, cadmium, or tin surfaces
such as aged raised flooring panels and supports. If these whiskers are disturbed, they can break
off and become airborne, possibly causing computer failures or operational interruptions. This
metallic particulate contamination is a relatively rare but possible threat. Kits are available to test
for metallic particulate contamination, or you can request that your site preparation specialist or
HVAC engineer test the site for contamination before installing any electronic equipment.
Weight 35