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Changing the Default Boot Device (bootdef_dev)
Changing the Default Boot Device (bootdef_dev)
Description
The
bootdef_dev
environment variable determines the default
boot device, or devices, from which the system attempts to boot.
The system boots from the default boot device each time it is
turned on (if
auto_action
is set to boot or restart), or each time
the user enters the
boot
command.
Available
Settings
You can set the
bootdef_dev
environment variable to any
appropriate device or devices on your system.
Boot Device
Naming
Conventions
You can specify the boot device name in two ways, using either
an OpenVMS- or a DEC OSF/1-style device name. Table 10–3
provides a list of the device naming conventions, which can be
used in the boot command for either operating system. For a
description of the boot device name elements, see Chapter 9.
Table 10–3 Device Naming Conventions
Device Naming Conventions
OpenVMS AXP DEC OSF/1 AXP Device Type
DK RZ Fixed or removable disk
MK TZ Tape
ES ES Ethernet, MOP protocol
N/A EZ Ethernet, BOOTP
protocol
Default Setting
The default setting for the
bootdef_dev
environment variable is
set at the factory to boot from the internal fixed disk drive that
has been loaded with factory-installed software.
Changing Environment Variables 10–7