Restarting A System With Logical Partitions - IBM AS/400e Manual

From a command line at a workstation on that secondary partition type PWRDWNSYS OPTION
(*CNTRLD) DELAY (600) and press Enter.
If you power down a secondary partition, you will not affect any other logical partitions. This command is
the preferred way to power down a secondary partition.
Powering down the primary partition
Before you power down the primary partition, power down all of the secondary partitions. Then, use the
PWRDWNSYS command to power down the primary partition.
From a command line at a workstation on the primary partition type PWRDWNSYS OPTION (*CNTRLD)
DELAY (600) and press Enter.
If you do not power down the secondary partitions before the primary partition, all of the active secondary
partitions will power down abnormally. If the secondary partitions power down abnormally, it may take
much longer to power down and to perform an IPL of each secondary partition.
Delayed power off
Use delayed power off (option 7 on the Work with Partition Status display) only when you must power
down a logical partition, and the PWRDWNSYS command does not work.
When you use the delayed power off option, the partition waits a predetermined amount of time to power
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down. This allows the partition time to end jobs and write data to disks. However this command will cause
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| an abnormal initial program load (IPL) of the logical partition if OS/400 is running.
Immediate power off
Use immediate power off (option 8 on the Work with Partition Status display) only when a logical partition
cannot power down using PWRDWNSYS or delayed power off.
When you use the immediate power off option from the Work with Partition Status display, the system
powers down without any preset delay. This will cause an abnormal IPL of the logical partition and possibly
cause loss of data.
To power down using Delayed power off or Immediate power off, follow these steps:
1. From a dedicated service tools (DST) menu, select option 11 (Work with system partitions).
2. Select option 2 (Work with partition status).
3. Use the cursor to select the logical partition you want to power off.
4. Type 7 (Delayed power off) or 8 (Immediate power off).
5. At the confirmation display, press F10 to confirm your choice

Restarting a system with logical partitions

To restart the whole system (perform a power down and an initial program load (IPL)) the secondary
partitions must power down with the primary partition. If you are going to restart the primary partition, first
power down all of the secondary partitions.
You can restart a secondary partition without affecting the other secondary partitions. If the secondary
partition is powered on, you can restart it using PWRDWNSYS OPTION *CNTRLD DELAY (600)
RESTART (*YES). You can use this command from a command line at one of its workstations. However, if
you have powered off a secondary partition , you can only restart it from the primary partition.
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AS/400e: Logical Partitions: Managing