1

Front

Rear

Figure 1-5

Enterprise 4000 System

1.2 Basic Definitions

Ultra Enterprise server systems use a centerplane. Electrical traces embedded in the centerplane serve both the front and rear sides of the centerplane; therefore, the orientation of the sockets on the rear of the centerplane is opposite the orientation of sockets on the front of the centerplane.

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.

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.

Product Overview

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Sun Microsystems 6.0005E+11 manual Basic Definitions