System Startup, Configuration, and Shutdown Reference Manual (32650-90907)

Chapter 3
System Startup Functions
Starting the System
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These default options instruct the system to boot from disk, to use the configuration information last used to
boot the system, attempts to log on as OPERATOR.SYS (if the OPERATOR user has been created), to restart all
jobs and allow all users access to the system, to bring up all volumes present on the system, and to execute
commands found in the SYSSTART file, SYSSTART.PUB.SYS.
Enter an alternate option through a keyword parameter, or several alternate options in groups of keyword
parameters. The following command line shows an example of using multiple alternate options:
ISL> START GROUP=CONFG950 LOGON=JOHN.SMITH NORECOVERY&:
SINGLE-USER SINGLE-DISC
Executing Commands During System Startup
The file SYSSTART.PUB.SYS executes automatically at system startup if the SYSSTART parameter is specified
in the START command. This file can be used to set up the normal user environment automatically when the
system starts up. The contents of this file should include command parameters appropriate for your
environment, such as the standard limits for jobs and sessions, spooler start commands, stream device
identification, outfence priorities, event logging, and so on. These commands are then performed
automatically for you whenever the system is restarted.
A SYSSTART file can contain selected MPE commands (and their parameters) that the system manager is
allowed to execute except networking commands. (Networking commands should be executed from a job that
is streamed from SYSSTART, or from a logon UDC for OPERATOR.SYS.) You can use the following commands in
a SYSSTART file:
Create a SYSSTART file with any text editor. A properly formatted SYSSTART file is composed of five modules,
labeled and placed in the following order: startup, warmstart, coolstart, update, and reload. Notice that each
module must be separated by one or more asterisks. The following SYSSTART file sample is an example of the
type of commands you might want to include in a SYSSTART file. It is not intended to suggest entries for your
system’s SYSSTART file.
Example 3-4 A Properly Formatted SYSSTART File
STARTUP
STREAMS 10
ALLOW @.@;COMMANDS=REPLY
ACCEPT HEADOFF REFUSE
ALLOCATE HEADON STARTSESS
ALLOW JOBFENCE STARTSPOOL
ALTLOG JOBPRI STOPSPOOL
COMMENT JOBSECURITY STREAM
CONSOLE LDISMOUNT STREAMS
DEALLOCATE LIMIT SUSPENDSPOOL
DISALLOW LMOUNT TELL
DISCRPS LOG TELLOP
DOWN MRJECONTROL TUNE
DOWNLOAD OUTFENCE UP
VMOUNT