About Fan Trays - Sun Microsystems Fire V890 Service Manual

About Fan Trays

The basic system is equipped with three fan trays: a CPU fan tray, an I/O fan tray,
and a motherboard fan tray. The CPU and I/O fan trays contain two fans apiece,
while the motherboard fan tray contains a single fan. All systems are equipped with
this primary set of fan trays and redundant cooling from a secondary set of the same
fan trays.
The motherboard fan tray is also known as the I/O bridge fan tray since its primary
purpose is to cool the I/O bridge chips on the system motherboard.
The following table describes the system's fan trays.
Fan(s)
Primary CPU fan tray
Secondary CPU fan tray
Primary I/O fan tray
Secondary I/O fan tray
Primary motherboard fan tray
Secondary motherboard fan tray
234 Sun Fire V890 Server Service Manual • October 2005
Bay Description
1 One fan tray with two 6-inch fans
2 One fan tray with two 6-inch fans
3 One fan tray with two 4-inch fans
4 One fan tray with two 4-inch fans
5 One 3-inch fan
6 One 3-inch fan