Manually Stopping The System Unit - IBM 7013 J Series Operator's Manual

Manually Stopping the System Unit

Attention: Use the shutdown command to stop the system unit; loss of data can occur if
this command is not used.
1. Ensure that the Key Mode switch is in Normal or Service Position.
Note: It is possible to run the shutdown procedure from the system console (local or
remote line) with the key mode switch set to the Secure position. Set the key mode
switch to Normal or Service position before rebooting the system.
2. Perform the following Powering Down procedure.
Powering Down Procedure
The system should not be powered down before the operating system has stopped. The
following three steps must be followed to shut down the system.
Note: It is possible to run the shutdown procedure from the system console (local or
remote line) with the key mode switch set to the Secure position. Set the key mode
switch to Normal or Service position before rebooting the system.
1. Ensure that the key mode switch is in Normal or Service position
Note: You can run the shutdown command only if you are logged onto the system as root
user.
2. Run the shutdown command.
When the shutdown program is run, a warning message will be sent to all connected
terminals. The user can specify the time period between the sending of the warning
message and the system shutdown. This time is given with a default of 60 seconds.
shutdown –h +5
represents a period of 5 minutes
Attention: This period should allow enough time to finish your session and save your data.
The amount of time can vary from a few seconds, enabling the user to exit the vi editor, for
example, to several minutes, allowing you to properly finish the update of a database. If you
are updating a database, if the system is shut down before you have properly finished your
update session, the integrity of the database can be negatively affected and there can be
loss of important data.
The display of the message halt completed indicates the procedure is ended.
Note: In Standby-mode you can prevent unauthorized access to the system by turning the
key mode switch to the Secure position.
3. To complete the power-off procedure, turn the key mode switch to the Secure position;
set the power switch (located both on the system console and on the other terminals) to
Key Mode Switch in
Normal Position
Using the System Unit
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