IBM 8408-44E Site And Hardware Planning page 25

Table 5. Environment requirements (continued)
Temperature
Relative humidity
Maximum wet bulb temperature
Temperature
Relative humidity
Maximum wet bulb temperature
Notes:
1. IBM provides the recommended operating environment as the long-term operating environment that can result
in the greatest reliability, energy efficiency, and reliability. The allowable operating environment represents where
the equipment is tested to verify functionality. Due to the stresses that operating in the allowable envelope can
place on the equipment, these envelopes must be used for short-term operation, not continuous operation.
2. Must derate the maximum allowable temperature 1°C (1.8°F) per 175 m (574 ft) above 900 m (2953 ft) up to a
maximum allowable elevation of 3050 m (10000 ft).
3. The minimum humidity level is the larger absolute humidity of the -12°C (10.4°F) dew point and the 8% relative
humidity. These levels intersect at approximately 25°C (77°F). Below this intersection, the dew point (-12°C)
represents the minimum moisture level, while above it, the relative humidity (8%) is the minimum. For the
upper moisture limit, the limit is the minimum absolute humidity of the dew point and relative humidity that is
stated.
4. The following minimum requirements apply to data centers that are operated at low relative humidity:
v Data centers that have do not have ESD floors and where people are allowed to wear non-ESD shoes might
want to consider increasing humidity given that the risk of generating 8 kV increases slightly at 8% relative
humidity, when compared to 25% relative humidity.
v All mobile furnishings and equipment must be made of conductive or static dissipative materials and be
bonded to ground.
v During maintenance on any hardware, a properly functioning and grounded wrist strap must be used by any
personnel who comes in contact with information technology (IT) equipment.
5. Equipment that is removed from the original shipping container and is installed, but is powered down. The
allowable non-operating environment is provided to define the environmental range that an unpowered system
can experience short term without being damaged.
6. If one or more feature codes that are listed in Table 6 are installed in your system, then the maximum wet bulb
temperature is 28°C (82°F).
Table 6. Supported feature codes that affect environmental requirements
Feature codes (FCs)
1738 / EQ38
1752 / EQ52
1917 / 1866
1925 / 1869
1947 / 1868
1948 / 1927
1953 / 1929
1956 / 1844
1962 / 1817
1964 / 1818
Environment requirements
Environment (shipping)
-40.0°C to 60.0°C (-40°F to 140°F)
5% - 100% (no condensation)
29.0°C (84.2°F)
Environment (storage)
1°C - 60°C (33.8°F - 140°F)
5% - 80% (no condensation)
29.0°C (84.2°F)
Feature code names
856 GB (IBM i) 10K RPM SAS HDD (Gen2-S)
900 GB (AIX
146 GB (AIX/Linux) 15K RPM SAS HDD (Gen2-S)
300 GB (AIX/Linux) 10K RPM SAS HDD (Gen2-S)
139 GB (IBM i) 15K RPM SAS HDD (Gen2-S)
283 GB (IBM i) 15K RPM SAS HDD (Gen2-S)
300 GB (AIX/Linux) 15K RPM SAS HDD (Gen2-S)
283 GB (IBM i) 10K RPM SAS HDD (Gen2-S)
571 GB (IBM i) 10K RPM SAS HDD (Gen2-S)
600 GB (AIX/Linux) 10K RPM SAS HDD (Gen2-S)
6
1
®
/Linux) 10K RPM SAS HDD (Gen2-S)
Site and hardware planning
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