Altitude; Airflow And Heat Dissipation; Ds4800 Storage Subsystem Altitude Ranges - IBM DS4800 User, Installation And Maintenance Manual

Table 9. Temperature and humidity requirements (continued)
Condition
Relative humidity (no
condensation)
Notes:
1. The non-operating environment must not exceed the operating environment
limits for longer than 60 days.
2. The storage environment must not exceed the operating environment limits for
longer than 1 year.
3. 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.

Altitude

Table 10 lists the acceptable altitudes for operating, storing, and shipping the
DS4800 Storage Subsystem.
Table 10. DS4800 Storage Subsystem altitude ranges
Environment
Operating
Storage
Transit

Airflow and Heat Dissipation

Figure 10 on page 22 shows the intended airflow for an DS4800 Storage
Subsystem. Allow at least 30 inches in front of the storage subsystem and at least
24 inches behind the storage subsystem for service clearance, proper ventilation,
and heat dissipation.
Parameter
Operating range
Storage range
Transit range
Maximum dew point
Maximum gradient
Altitude
30.5 m (100 ft.) below sea level to 3048 m
(10,000 ft.) above sea level
30.5 m (100 ft.) below sea level to 3048 m
(10,000 ft.) above sea level
30.5 m (100 ft.) below sea level to 12,000 m
(40,000 ft.) above sea level
Requirement
20% to 80%
10% to 93%
5% to 95%
26° C (79° F)
10% per hour
Chapter 1. Introduction
21