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Environmental requirements and specifications
This section describes the environmental requirements and specifications for the
DS4700 Express Storage Subsystem, including temperature and humidity, altitude,
airflow and heat dissipation, shock and vibration requirements, and acoustic noise
levels.
Temperature and humidity
Table 13 lists the acceptable temperature and humidity ranges for the DS4700
Express Storage Subsystem when in storage or in transit. Table 14 lists temperature
and humidity ranges for the storage subsystem in typical Information Technology
(IT) or office environments. Table 15 lists temperature and humidity ranges for the
storage subsystem in a Telco/NEBS-3 compliant environment.
Note: Substantial deviations from the suggested operating range, in either
direction, if sustained for extended periods of time, will expose the unit to
greater risk of failure from external causes.
Important: The recommended operating environment air temperature is 22° C (72°
F) or lower.
Table 13. Temperature and humidity requirements for storage subsystem when in storage or
in transit
Condition Parameter Requirement
Temperature Storage range -10° - 65° C (14° - 149° F)
Maximum rate of change 15° C (27° F) per hour
Transit range -40° C to 65° C (-40° F to
149° F)
Maximum rate of change 20° C (36° F) per hour
Relative humidity (no
condensation)
Storage range 8% to 90%
Transit range 5% to 95%
Maximum dew point 26° C (79° F)
Maximum gradient 10% per hour
Table 14. Temperature and humidity requirements for storage subsystem in a typical
Information Technology (IT) or office environment
Condition Parameter Requirement
Temperature Operating range 10° - 35° C (50° - 95° F)
Maximum rate of change 10° C (18° F) per hour
Relative humidity (no
condensation)
Operating range 8% to 80%
Table 15. Temperature and humidity requirements for storage subsystem in a Telco/NEBS-3
compliant environment
Condition Parameter Requirement
Temperature
1
Operating range 5° - 40° C (41° - 104° F)
Short-term
2
-5° - 50° C (23° - 122° F)
Maximum rate of change 30° C (54° F) per hour
24 IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide