Sun Enterprise 6500/5500/4500 Systems Reference Manual

Definitions of Terms

Centerplane - all Sun Enterprise X500 server systems use a centerplane. The orientation of the sockets on the rear of the centerplane is opposite the orientation of sockets on the front of the centerplane.

Board orientation - Boards in the front of the card cage are installed component side down, and boards in the rear of the card cage are installed component side up. Similarly, the orientation of the power/cooling modules installed in the rear of the system chassis is opposite the orientation of power/cooling modules in the front of the system chassis.

Viewer orientation - Since boards, modules, and power/cooling modules may be located on either side of the Enterprise server chassis centerplane, the terms "front," "rear," "right," and "left" are defined in Table 1-1.

Table 1-1 Definitions of Terms

Orientation of the Server  

Front 

The key switch is located here. 

Rear 

The AC power switch and cable are located here.  

Orientation of Power/Cooling Module, Board, and UltraSPARC II Module  

Front 

Edge nearest you as you face the unit installed in a system 

Right 

Side to your right as you face the front of the installed unit 

Left 

Side to your left as you face the front of the installed unit