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Chapter 1 System Overview 1-31
1.4 I/O Options
1.4.1 External I/O Expansion Unit
You can purchase an optional External I/O Expansion Unit to add I/O capacity to
the server. For more information, refer to the External I/O Expansion Unit Installation
and Service Manual.
1.4.2 PCI Cards
Each PCI card in the server must be mounted to a PCI cassette before the card can be
inserted into the I/O unit slot. For more information, see Section 1.3.8, “I/O Unit”
on page 1-27.
1.5 Software Features
Solaris OS is installed on the system domains. In addition to its suite of software
capabilities, Solaris OS provides functions that interact with system hardware.
■ Dynamic Reconfiguration
■ Solaris zones
■ PCI hot-plug
■ Capacity on Demand
Both midrange servers use the eXtended System Control Facility (XSCF) firmware.
This firmware runs on the service processor and provides control and monitoring
functions for the system platform.
For more information on the software features, see Chapter 3.