Sun Microsystems Netra t 1120, Service Manual

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1-1
C H A P T E R
1
Description
The Netra t 1120/1125 system uses the family of UltraSPARC™ II processors.
Housed within a rack-mounting enclosure, the Netra t 1120/1125 provides the
following:
■
One or two UltraSPARC II processors
■
Power and cooling for high performance processors
■
Extensive I/O expansion and a wide range of options
■
Modular internal design
■
High performance disk, system, memory and I/O subsystem
■
High-performance peripheral component interconnect (PCI) I/O expansion with
comparable options to existing SBus options.
The Netra t 1120 is a –48V/–60Vdc-powered system. The Netra t 1125 is an AC-
powered system. This is the only difference between the two systems.
FIGURE 1-2
and
FIGURE 1-4
show front and rear views of the Netra t 1120/1125
system.
1.1 System Features
System components are housed in a rack-mounting enclosure. Overall enclosure
dimensions (width x depth x height) are 431.8mm x 496.1mm x 177mm (17in x
19.53in x 7in (4U)). System electronics are contained on a single printed circuit board
(motherboard). The motherboard contains the CPU module(s), memory, system
control application-specific integrated circuits (ASICs) and I/O ASICs.
The system has the following features:
■
Rack-mounting enclosure with power supply.
■
Support for modular UltraSPARC II processor(s) with 1, 2 or 4 Mbyte Ecache, and
system operating frequencies from 300MHz to 400MHz.
■
UPA coherent memory interconnect.