Environmental Requirements And Specifications; Temperature And Humidity; Temperature And Humidity Requirements For Storage Subsystem When In Storage Or In Transit; Temperature And Humidity Requirements For Storage Subsystem In A Typical Information Technology (It) Or Office Environment - IBM System Storage DS5020 Installation, User's, And Maintenance Manual
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Environmental requirements and specifications
This section describes the environmental requirements and specifications for the
DS5020 storage subsystem, including temperature and humidity, altitude, airflow
and heat dissipation, shock and vibration requirements, and acoustic noise levels.
Temperature and humidity
Table 6 lists the acceptable temperature and humidity ranges for the DS5020
Storage Subsystem when in storage or in transit. Table 7 lists temperature and
humidity ranges for the storage subsystem in typical Information Technology (IT) or
office environments. Table 8 lists temperature and humidity ranges for the storage
subsystem in a NEBS/ETSI compliant environment.
Note: Substantial deviations from the suggested operating range, in either
Important: The recommended operating environment air temperature is 22° C (72°
Table 6. Temperature and humidity requirements for storage subsystem when in storage or in
transit
Condition
Temperature
Relative humidity (no
condensation)
Table 7. Temperature and humidity requirements for storage subsystem in a typical
Information Technology (IT) or office environment
Condition
Temperature
Relative humidity (no
condensation)
Table 8. Temperature and humidity requirements for storage subsystem in a NEBS/ETSI
compliant environment
Condition
Temperature
Relative humidity
condensation)
direction, if sustained for extended periods of time, will expose the unit to
greater risk of failure from external causes.
F) or lower.
Parameter
Storage range
Maximum rate of change
Transit range
Maximum rate of change
Storage range
Transit range
Maximum dew point
Maximum gradient
Parameter
Operating range
Maximum rate of change
Operating range
Parameter
1
Operating range
Short-term
Maximum rate of change
1
(no
Operating range
Short-term
Requirement
-10° - 65° C (14° - 149° F)
15° C (27° F) per hour
-40° C to 65° C (-40° F to
149° F)
20° C (36° F) per hour
8% to 90%
5% to 95%
26° C (79° F)
10% per hour
Requirement
10° - 35° C (50° - 95° F)
10° C (18° F) per hour
8% to 80%
Requirement
5° - 40° C (41° - 104° F)
2
-5° - 50° C (23° - 122° F)
30° C (54° F) per hour
5% to 85%
2
5% to 90% (not to exceed
0.024 kg water/kg of dry air)
Chapter 1. Introduction
23
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