Restarting and powering down a system with logical partitions

At times you will need to perform an initial program load (IPL) or power down the entire system or a single partition. It is important to remember that when you perform an IPL on the hosting partition you are also performing an IPL on all the client partitions.

If you power down the hosting partition, you will also power down any client partitions that are running. Unless you power down the client partitions before the hosting partition, any client partitions that are still running may have an abnormal IPL.

Refer to Basic system operations for more information on abnormal IPLs.

Some of the IPL tasks you can perform are as follows:

• Power down the system.
• Restart the system.
• Change operating mode for a logical partition.
• Change the IPL source for a logical partition.