AC450NX Rack Server System Product Guide
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The SSU uses the information provided by .CFG files, configuration registers, flash memory, and
the information that you enter, to specify a system configuration. The SSU writes the
configuration information to flash memory.
The SSU stores configuration values in flash memory. These values take effect when you boot the
server. POST checks the values against the actual hardware configuration; if they do not agree,
POST generates an error message. You must then run the SSU to specify the correct configuration
before the server boots.
The SSU always includes a checksum with the configuration data so that the BIOS can detect any
potential data corruption before the actual hardware configuration takes place.

What You Need to Do

The SSU may be run directly from the Server Configuration Software CD or from a set of DOS
diskettes. If you choose to run the SSU from a set diskettes, you must copy the SSU from the
Server Configuration Software CD to diskettes and follow the instructions in the README.TXT
of diskette one. See Chapter 2, “On-site Installation: Installing the Server,” to create a set of SSU
diskettes. Only diskette one of the set must be DOS bootable.
✏NOTE
If your diskette drive is disabled, or improperly configured, you must use the
flash-resident Setup utility to enable it so that you can use the SSU. If
necessary, you can disable the drive after you exit the SSU. Information
entered using the SSU overrides any entered using Setup.

Running the SSU

• Running the SSU Locally
Running the ssu.bat file provided on the SSU media starts the SSU. If the server boots directly
from the SSU media, the ssu.bat file runs automatically. If it boots from a different media, the
SSU can be started manually or by another application. When the SSU starts in the local
execution mode (the default mode), the SSU accepts input from the keyboard and/or mouse.
The SSU presents a VGA-based Graphical User Interface (GUI) on the primary monitor.
The SSU runs from writable, nonwritable, removable, and nonremovable media. If you run the
SSU from nonwritable media, all your preference settings will be lost because you cannot save
them.
The SSU supports the ROM-DOS V6.22 operating system. It can run on other ROM-DOS
compatible operating systems but they are not supported. The SSU will not operate from a
DOS-box running under an operating system such as Windows.