Data General AViiON 4600 Series, Customer Documentation

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Using the SCM Configuration Menus
5-3
014–002091
NOTE: With some Data General hardware maintenance and remote assistance
agreements, you will see menu items not shown in Figure 5-1. For
descriptions of contract-dependent features, refer to the remote assistance
and maintenance user's guide(s) you received with your system.
Changes you make while using SCM menus become effective the next time you power
up or reset the computer. You can reset the computer by using the
RESET
command
at the SCM prompt or by cycling power to the system. See Chapter 3 for information
about operator switches and the powerup process.
You can exit from any menu by selecting the last item on the menu or by pressing New
Line at the prompt to select the default. You return to the previous menu,
except when
you leave the View or Change System Configuration menu; when you exit from the
View or Change System Configuration menu you return to the SCM prompt.
You can select multiple items to view or change at the
Enter choice(s)–>
prompt
on each menu. The SCM executes the items in sequence before returning to the menu
screen. Use a space or a comma to separate item numbers.
The rest of this chapter contains sections that describe how to use menu items
accessible from the View or Change System Configuration menu.
Changing the Default System Boot Path
Whenever you start your system, the SCM begins an automatic boot sequence after
powerup testing completes. The SCM uses the default system boot path to find the
automatic boot device. It uses this same default system boot path whenever you use
the
BOOT
command without an argument. The default system boot path is usually
your operating system.
If you do not set a valid default system boot path (or if you leave the boot path empty),
the default boot path is not initialized. When you power on the computer without an
initialized boot path, the SCM uses a hardwired sequence to attempt a boot from the
first SCSI disk. If it cannot boot from disk, it enters the System Control Monitor and
displays the SCM prompt.
NOTE: If you purchased a preloaded operating system from Data General, the
default system boot path was initialized at the factory to boot the DG/UX
Starter operating system.
Specifying Boot Devices
This section briefly describes the device specifications for booting your computer from
disk or tape or across a LAN. You use this information as a
boot path argument to the
SCM command or as an entry for your system's default boot path in the View
or Change System Configuration menu. Refer to Appendix B for details about the
command, or for general information about accessing the SCM.
Because the boot process is very flexible, it can sometimes be complex. Therefore, this
section provides only a quick reference. Appendix B contains a detailed description of
boot path specifications. You may need to refer to Appendix B if you have any
nonstandard devices configured with your computer.