Dell PowerEdge C8000 - Manual (Page 23)

About the System 23
Fan Bay Numbering
The back of the PowerEdge C8000 server enclosure includes three hot-
swappable fan modules that provide the system with a redundant cooling
source. Each fan module contains two cooling fans. All three fan modules
must be installed at all times to ensure proper cooling.
Figure 1-9. Fan Bay Numbering
Fan Bay Cooling Fans
Fan module 1 Fan 2
Fan 1
Fan module 2 Fan 4
Fan 3
Fan module 3 Fan 6
Fan 5