In one embodiment, the invention recites a fan motor assembly with
integrated redundant availability. The fan motor assembly comprises a fan
motor subassembly with a plurality of replaceable fan motors, and a fan
motor selector mechanism coupled to the fan motor subassembly, so that
the fan motor selector mechanism selectively engages one of the plurality
of replaceable fan motors to a fan. The fan motor assembly further
comprises a control unit which is coupled to the fan motor selector
mechanism which is configured to control the fan motor selector mechanism
such that a first replaceable fan motor mechanically powers the fan while
a second replaceable fan motor can be dynamically removed from the fan
motor subassembly.