Operating limits
Table 19. Operating limits
Description Limit
Temperature 5°C through 35°C normal, 35°C through 40°C
for 10% of the time
Humidity -12°C DP and 8% to 85% RH (non-condensing)
Temperature Gradient (disk) 20°C/hr
Altitude Compensation Normal: Lower temp 1°C per 300 M above 950
M
Improbable: Lower temp 1°C per 175 M above
950 M
Shipping and storage requirements
NOTE: Systems and components must not experience changes in temperature and humidity that are likely to cause
condensation to form on or in that system or component. Do not exceed the shipping and storage temperature gradient
of 45°F/hr (25°C/hr).
Table 20. Shipping and storage requirements
Requirement Description
Ambient temperature -40° F to 149°F (-40°C to 65°C)
Temperature gradient 45°F/hr (25°C/hr)
Relative humidity 10% to 90% noncondensing
Elevation -50 to 35,000 ft (-16 to 10,600 m)
Storage time (unpowered) Recommendation Do not exceed 6 consecutive months of
unpowered storage.
Base enclosure airflow
The base enclosure uses an adaptive cooling algorithm that increases or decreases fan speed as the unit senses changes to the external
ambient temperature. Exhaust increases with ambient temperature and fan speed, and is roughly linear within recommended operating
parameters. Note that the information in the table below is typical, and was measured without cabinet front/rear doors that would
potentially reduce front-to-back air flow.
Table 21. Base enclosure airflow
Max Airflow CFM Min Airflow CFM Max Power Usage
(Watts)
165 CFM 50 CFM 850 W
Environmental recovery
If the system exceeds the maximum ambient temperature by approximately 10°C (18°F), the nodes in the system begin an orderly
shutdown that saves cached data, and then shut themselves down. Link control cards (LCCs) in each expansion enclosure in the system
power down drives but remain powered on.
If the system detects that the temperature has dropped to an acceptable level, it restores power to the base enclosures and the LCCs
restore power to their drives.
20
Technical specifications
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