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Chapter 7 607
Command Definitions S-SO
=SHUTDOWN
=SHUTDOWN
Initiates a shutdown of MPE/iX.
Syntax
=SHUTDOWN[ system terminal dtc tape disc network other ]
Parameters
None.
Operation Notes
The =SHUTDOWN command performs an implicit =LOGOFF of all sessions, including the
session logged at the system console. All system processes are stopped in an orderly
fashion. This includes the completion of all pending system activity and any processing
necessary to ensure that the integrity of all system tables and directories is maintained.
Once these procedures are complete, SHUT is displayed on the console, the CPU halts, and
console interrupt (
CTRL A) is ineffective.
Device configuration changes that were made after the preceding load (UP, DOWN, ACCEPT,
REFUSE, and spooling commands) are not retained. Configuration changes made during a
system startup from tape are recorded and retained until the next system startup from
tape. Newly assigned or released global resource identification numbers (RINs) are
permanently recorded.
All communication lines must be closed before issuing a =SHUTDOWN command or a manual
halt of the system may be necessary. Note that data is lost if a transmission is in progress
when the halt is performed. If any network service (NS) lines are left open when the
=SHUTDOWN command is issued, lines to the remote system remain open and any remote
sessions become hung. In this case, the remote system's operator may need to issue
ABORTIO commands for the hung sessions and then abort the sessions themselves.
Spooled devices stop operation immediately upon receiving a =SHUTDOWN command. A
START RECOVERY retains spoolfiles which are printed when the system is returned online.
You can use any of the options to indicate the reason that you are shutting down the
system. These options were developed to identify any possible type of system hang that
might occur. For example, if you shutdown to clear a DTC hang, you can use the
=SHUTDOWN dtc option.