Fan Descriptions - Compaq AlphaServer ES45 Service Manual

The system fans are shown in Figure 1–14 and described in Table 1–1.
Table 1–1 Fan Descriptions
Fan
Number Area Cooled
PCI card cage
,
Removable media
4.5-in.
Right drive cage
, Power supplies
Left drive cage
4.5-in.
CPU and memory
card cage
4.5-in.
redundant
CPU and memory
card cage
6.75-in.
main fan
1-28 ES45 Service Guide
Fan Failure Scenario
Both fans are powered at all times. If one
fan fails, all other system fans run at
maximum speed to provide adequate
cooling. You can replace either fan while
the system is running.
Both fans are powered at all times. If one
fan fails, all other system fans run at
maximum speed to provide adequate
cooling. You can replace either fan while
the system is running.
Not powered except during a fan failure.
Fan is powered at all times. If it fails, all
other system fans run at maximum speed to
provide adequate cooling. You can replace
the fan while the system is running.