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Chapter 1 System Overview 1-21
1.3 Server Components
This section describes the components of both high-end servers.
For details on each, see the SPARC Enterprise M8000/M9000 Servers Service Manual.
■ CPU Module
■ CPU/Memory Board Unit
■ I/O Unit
■ FAN Unit
■ Power Supply Unit
■ Crossbar Unit
■ Clock Control Unit
■ Operator Panel
■ XSCF Unit
■ Internal Drive Units
■ Hard Disk Drive
■ CD-RW/DVD-RW Drive Unit
■ Tape Drive Unit
1.3.1 CPU Module
The CPU module (CPUM) contains a SPARC64 VI/SPARC64 VII/SPARC64 VII+
processor and a DC-DC converter (DDC). Up to four CPUMs can be mounted on a
CPU/memory board unit.
The CPUM has the following features:
■ The CPUM contains a SPARC64 VI/SPARC64 VII/SPARC64 VII+, a high-
performance multicore CPU that uses the latest LSI process.
■ If an unforeseen fault is detected, the SPARC64 VI/SPARC64 VII/SPARC64 VII+
processor enables operation to continue without interruption by using an
automatic recovery function, automatic retry function, or automatic degradation
function, depending on how the system is configured.
■ A redundant DDC configuration enables continuous operation even if a DDC
fails.