Booting an Operating System
5-11
5.2.2 Boot Environment Variables (for OpenVMS and
DIGITAL UNIX)
With OpenVMS or DIGITAL UNIX systems, you can change the factory-installed
default boot device, or, if your operating system is not factory-installed, define a
default boot device, to be used automatically if no device is specified in the boot
command itself.
Example 5-8 Viewing and Setting Boot Environment Variables
(for OpenVMS and DIGITAL UNIX)
P00>>> show boot*
➊
boot_dev
boot_file
boot_osflags
0
boot_reset
OFF
bootdef_dev
booted_dev
booted_file
booted_osflags
P00>>> set bootdef_dev dkb100
➋
P00>>> show boot*
boot_dev
boot_file
boot_osflags
0
boot_reset
OFF
bootdef_dev
dkb100.1.0.6.1
booted_dev
booted_file
booted_osflags
For OpenVMS and DIGITAL UNIX systems, some boot environment variables can be
set by the user using the set SRM console command. Others are set by values you may
specify in a boot command. For Windows NT systems, the boot path can be set with
the alphabios firmware.
➊
The show boot* command displays the current settings of the boot environment
variables. These are described in detail following.
➋
In Example 5-8, the user sets the default boot device environment variable
bootdef_dev to device dkb100.
