IBM DS8882F, Introduction And Planning Manual, Page: 106 / 164

Operating environment requirements
You must meet specific operating environment requirements at all the air intake
locations of your storage system.
The operating points vary depending on the state of the system. The system can be
in the following states:
v Powered on
v Powered off
v In storage
Powered on:
Plan for the operating ranges and recommended operating points of the storage
system.
Table 39 provides the operating ranges for your storage system when its power is
on.
Table 39. Operating extremes with the power on
Measurement Value
Altitude 0 - 2133 m (0 - 7000 ft)
Dry bulb temperature 16 - 32°C (60 - 90°F)
Relative humidity 20 - 80%
Wet bulb temperature (maximum) 23°C (73°F)
Table 40 provides the optimum operating points for your storage system with its
power on.
Table 40. Optimum operating points with the power on
Measurement Value
Temperature 22°C (72°F)
Relative humidity 45%
Table 41 provides the operating ranges for a storage system with power on.
Table 41. Optimum operating ranges with power on
Measurement Value
Temperature 16 - 32°C (60 - 90°F)
Relative humidity 40 - 50%
Powered off:
Plan for the required temperature and humidity ranges when the storage system is
off.
Table 42 on page 97 provides the temperatures and humidity requirements for your
storage system when the power is off.
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DS8882F Introduction and Planning Guide