Your System's Current Startup Action; Choosing ''Halt; Choosing ''Boot; Choosing ''Restart - DEC 4000 600 series Owner's Manual

To display your system's current default startup action, enter the
Your System's
Current Startup following:
Action
>>> show auto_action
The system responds with a display similar to the following:
auto_action
In this example, the default startup action is boot.
Setting the default startup action to halt will cause your system
Choosing
''Halt'' to remain in console mode when you power up the system, when
the system crashes, or when you press the Reset button.
If you plan to boot your system from the same device, you may
Choosing
want to set your system's default startup action to boot.
''Boot''
The bootdef_dev environment variable works in conjunction
with this setting: whenever you power up your system or press
the Reset button, or the system crashes, your system boots
automatically from the boot device identified by the bootdef_dev
environment variable. The system is said to ''autoboot.''
Autobooting will:
•
•
•
Setting the default startup action to restart causes your system
Choosing
to attempt to restart the operating system automatically if
''Restart''
the system crashes. If the restart attempt is unsuccessful, the
system will reboot the operating system.
When you power up the system or press the Reset button, the
system will automatically boot the operating system (autoboot).
Refer to Choosing Boot for more information about autobooting.
Changing the Default Startup Action (auto_action)
Return
boot
Cause the operating system to automatically restart in the
event of a power interrupt.
Simplify the boot process for a less experienced user trying
to boot operating system software.
Decrease the user response required to get to the operating
system level.
Setting Environment Variables 4–5