Installation guide

For example, to boot the system off of disk dka0, enter:
>>> set bootdef_dev dka000
To boot the system from the first disk on the PMAZB or PMAZC
option card in TURBOchannel slot 1, enter the following
command. Note that the double quotes (") are necessary for the
console to understand where it is booting from.
>>> set bootdef_dev "1/dka000"
d. You have the option of booting from an alternate kernel. If you
want to do this, enter:
>>> set boot_osflags i
When booting, the system prompts you to enter a file name. For
example:
Enter [kernel_name] [option_1 ... option_n]: genvmunix
The system will display informational messages.
On DEC 4000 and DEC 7000 processors, you can also boot an
alternate kernel by setting the boot_file variable to the name of
the kernel you want to boot. For example, to boot a genvmunix
kernel, enter:
>>> set boot_file genvmunix
On DEC 4000 and DEC 7000 processors, you must clear the
boot_file variable if you want to boot the default kernel,
/vmunix. For example:
>>> set boot_file ""
In a multiprocessor configuration, you can use the set cpu_enable
command to selectively enable processors from the console. The mask is a
bit field, where each bit represents a slot position. The easiest way to
ensure all processors are enabled is to set the CPU mask to ff. After
setting the mask, turn the power on the system off and then back on again.
The operating system also provides a mechanism for enabling or disabling
processors at system boot time. See the description of the
cpu-enable-mask attribute in the System Configuration and Tuning
guide for information.
After you have set the console variables, use the following command to boot
the system:
>>> b
Starting Up and Shutting Down the System 3–9