Technical data

Starting Up and Shutting Down the System
4.1 Understanding Booting and System Startup
4.1.4 System Startup and STARTUP.COM
Immediately after your system boots, it runs the site-independent command
procedure SYS$SYSTEM:STARTUP.COM to start up the system and control the
sequence of startup events. This section describes STARTUP.COM.
Caution
Do not modify SYS$SYSTEM:STARTUP.COM. This file is deleted and
replaced each time you upgrade your system to the next version of the
operating system. Leaving STARTUP.COM intact prevents you from
inadvertently altering any commands in the file, which in turn could
cause the startup procedure to fail.
Although you should not modify STARTUP.COM, sometimes you may want to
control site-independent startup when booting your system. For information, see
Section 4.5.
STARTUP.COM uses a series of command procedures, executable images, and
database files to perform the following startup tasks:
• Define systemwide logical names required for the symbolic debugger, language
processors, linker, image activator, and help processor.
• Start processes that control error logging, SMISERVER (the system
management server), the job controller, the operator log file, and security
auditing.
• Connect devices that are physically attached to the system by invoking the
SYCONFIG.COM procedure. Configure devices and load their I/O drivers.
• Install known images to reduce I/O overhead in activating the most commonly
run images or to identify images that must have special privileges.
STARTUP.COM executes the following site-specific startup command procedures
in this order:
1. SYS$MANAGER:SYCONFIG.COM
2. SYS$MANAGER:SYLOGICALS.COM
3. SYS$MANAGER:SYPAGSWPFILES.COM
4. SYS$MANAGER:SYSECURITY.COM
5. SYS$MANAGER:SYSTARTUP_VMS.COM
For information about site-specific startup command procedures, see Section 5.2.
4.1.5 Messages Indicating Booting and Startup Progress
When you successfully boot a system, it prints a banner, followed by messages
similar to the following message:
1. The following message indicates that the system is executing the command
procedure SYS$SYSTEM:STARTUP.COM:
The OpenVMS system is now executing the system startup procedure.
This procedure configures and initializes the system and executes several
site-specific command procedures. For more information, see Section 4.1.4.
Starting Up and Shutting Down the System 4–5