Hitachi NAS Platform 4000 Series - Page 31

Airow:
Fan
speed
Single fan in free
air
Single fan at
33%
perforation
Two fans at 33%
perforation
m^3/mi
n CFM m^3/min
m^3/mi
n CFM
@ 100% 7.40 261.22 2.96 5.92 208.98 Not used
@ 2/3 4.93 174.15 1.97 3.95 139.32 Fan failure or
o
ver temper
ature
@1/3 2.47 87.07 0.99 1.97 69.66 Normal
operation
Figure 1 Airow performance curves
Item Description
1 Performance curves, pulse width modulation (PWM) = 100%
2 Static pressure (Pa)
3 Airow (m3/minute)
Server specications
Chapter 4: Hitachi NAS Platform server components
Hitachi NAS Platform and Hitachi Unied Storage Series 4000 Hardware Reference 31