You might need to stop the system to complete another task. If your system is not managed
by the Hardware Management Console (HMC), use the instructions in this topic to stop the system by
using the power button.
Procedure
Log in to the host partition as a user with the authority to run the
shutdown or pwrdwnsys (Power Down System) command.
On the command line, enter one of the following commands:
If your system is running the AIX® operating system,
type shutdown.
If your system is running the Linux® operating system,
type shutdown -h now.
If your system is running the IBM® i operating system,
type PWRDWNSYS. If your system is partitioned, use the PWRDWNSYS
command to power off each of the secondary partitions. Then, use the PWRDWNSYS
command to power off the primary partition.
The command stops the operating system. Choose from the following options:
If the system power turns off, the power-on light begins to slowly flash, and the system goes
into a standby state, continue with step 5.
If your system does not power off when the last partition powers off, continue with step 3.
Open the front rack door, if necessary.
Hold the power button (A) on the control panel, as shown in the
following figure. The control panel shows a countdown from 4 to 0. After the countdown is complete,
release the power button.
The system power turns off, the power-on light begins to slowly flash, and the system goes into a
standby state.
Figure 1. Control panel LEDs
Record the IPL type and the IPL mode from the control panel display to help you return the
system to this state when the installation or replacement procedure is completed.
Set the power switches of any devices that are connected to the system to off.
