Technical data

Customizing the Operating System
5.4 Customizing Startup Databases with SYSMAN
File Description
VMS$PHASES.DAT Determines the order of the phases of startup in a sequential
list. This file includes a series of four basic phases (INITIAL,
CONFIGURE, DEVICE, and BASEENVIRON) needed
to bring the operating system up to a basic working
environment, followed by a series of phases for layered
products. STARTUP.COM uses this list of phases for startup.
Do not modify this file.
VMS$VMS.DAT Equivalent to the logical name STARTUP$STARTUP_VMS.
This file contains information about the files used to start the
base operating system environment during system startup. Do
not modify this file.
STARTUP$STARTUP_VMS is provided for your information
only. Use SYSMAN to display information in this file. For
more information, see Section 5.4.5.
VMS$LAYERED.DAT Equivalent to the logical name STARTUP$STARTUP_
LAYERED. This file contains information about files that start
site-specific products and layered products. The system uses
the information in this file to start layered products during
system startup. Section 5.4.2 provides more information about
this file.
Use SYSMAN to modify this file so that it contains information
about all the layered product startup files you want to execute
on your system.
If you have site-specific software that you want to manage separately from your
layered products, you can use SYSMAN to create an additional startup database.
5.4.2 Understanding the Layered Product Startup Database
The layered product startup database file (referred to by the logical name
STARTUP$STARTUP_LAYERED) lists the files and command procedures that
start site-specific products and layered products. It contains the following
characteristics of each startup file:
• Name of the component file to be run. The file type must be either .EXE or
.COM.
• Phase in which the component file is to run. Each phase describes a minimum
environment that exists at that point in the startup process, as follows:
1. BASEENVIRON—Startup tasks execute here. These must be performed
before the site-specific startup command procedure, SYSTARTUP_
VMS.COM, executes.
2. LPBEGIN—SYSTARTUP_VMS.COM, the site-specific startup command
procedure, executes here, as do any other files that prepare an
environment necessary for layered products.
3. LPMAIN—The majority of layered products execute here. This phase is
the default.
4. LPBETA—Layered products that have a dependency on previously
installed products execute here.
5. END—Products that are dependent on layered products execute here.
Customizing the Operating System 5–19