Acoustic Noise; Ds4800 Storage Subsystem Airflow; Ds4800 Storage Subsystem Power And Heat Dissipation; Ds4800 Storage Subsystem Sound Levels - IBM DS4800 User, Installation And Maintenance Manual

Figure 10. DS4800 Storage Subsystem airflow
Table 11 lists the KVA, watts, and Btu calculations for the DS4800 Storage
Subsystem. These values assume the power supplies have a 73 percent efficiency
and a power factor of 0.99. These tabulated power and heat dissipation values are
typical for the storage subsystem. Maximum configuration units are typically
operated at higher data rates, have larger random access memory (RAM)
capacities, or have different host interface boards.
Table 11. DS4800 Storage Subsystem power and heat dissipation
Parameter
RAID controller

Acoustic Noise

Table 12 lists the maximum sound levels emitted by the storage subsystem.
Table 12. DS4800 Storage Subsystem sound levels
Measurement
Sound power (normal operation)
Sound pressure (normal operation)
These levels are measured in controlled acoustical environments according to ISO
7779 and are reported in accordance with ISO 9296. The declared sound power
levels indicate an upper limit, below which a large portion of machines operate.
Sound pressure levels in your location might exceed the average 1-meter values
stated because of room reflections and other nearby noise.
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IBM System Storage DS4800 Storage Subsystem: Installation, User's, and Maintenance Guide
KVA Watts (AC)
.240 235
Level
6.0 bels
60 dBA
Btu per hour
803.7