Installation guide

Setting or Changing the Default Boot Device (bootdef_dev)
Setting or Changing the Default Boot Device (bootdef_dev)
Default Boot
Device
The boot device is the device from which the bootstrap system
software is acquired. In most cases, the default boot device has
been identified on your system as the device on which Factory
Installed Software (FIS) was loaded.
Why Set the
Default Boot
Device?
By identifying the boot device to your system, you can simplify
the process of booting operating system software as follows:
• You can enter b and press Return at the console prompt and
the system will find and boot operating system software.
• You can automatically boot operating system software
by setting the default startup action to boot (using the
auto_action environment variable) in conjunction with this
variable.
Your System’s
Current Default
Boot Device
To display your system’s current default boot device, enter the
following:
>>> show bootdef_dev
Return
The system responds with a display similar to the following:
bootdef_dev dka0
In this example, the default boot device is dka0.
Which One
Is the Boot
Device?
If a default boot device has not been set and you do not know
which device is the boot device, determine your system’s boot
device as follows:
• Display the devices connected to your system:
>>> show device
...
• Beginning at the top of the list of devices that are displayed
and working downward, try booting operating system
software from each device.
Setting Environment Variables 4–7