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System Startup and Shutdown
4.1 Booting the System
•
You can also use the conversational boot to specify a minimum startup. For
example, if you want to boot the system and avoid autoconfiguring all the
peripheral devices, enter the following command:
SYSBOOT> SET STARTUP_Pl "MIN"
The value of STARTUP _Pl is saved and affects future boot operations. After
the operating system boots, you can run SYSGEN to reset STARTUP _Pl. For
example, enter the following commands to reset STARTUP _Pl to its default
value (null):
$ RUN SYS$SYSTEM:SYSGEN
SYSGEN> USE CURRENT
SYSGEN> SET STARTUP_Pl
SYSGEN> WRITE CURRENT
SYSGEN> EXIT
4.1.4 Automatic Restart
The VMS operating system can restart automatically from the default boot device
designated in ROM (read-only memory). This section describes the two types of
automatic restarts: warm (Section 4.1.4.1) and cold (Section 4.1.4.2).
To manually restart the system using the Restart button, see Section 1.2.2.
4.1.4.1 Warm Start
If
you set the lower key switch on your VAX 6000 series console to Auto Start, the
system will restart automatically under the following conditions:
•
When the system power comes on after a power failure
•
After an error halt
This type of automatic restart is known as a warm start because the backup
battery unit supplies enough power to preserve the contents of memory.
4.1.4.2 Cold Start-Setting a Default Disk
4-6
If
you shut down your VAX 6000 system and then specify Y at the auto reboot
prompt, the system will restart automatically only if you have designated a
default boot device prior to the shutdown. This type of automatic restart is
known as a cold start because the memory is reinitialized before the system
reboots.
To specify a default boot device, use the SET BOOT command in the following
format:
>>> SET BOOT DEFAULT ddu
Note _ _ _ _ _ _ _ _ _ _ _ _
To use any SET command, the lower key switch must be in the Update
position.
For example, if you want the default boot device to be DUO, enter the following
and press Return:
>>> SET BOOT DEFAULT DUO
Because the /XMI and /BI qualifiers are not specified, the system uses their
default values.
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