System information

Chapter 6. Working with the HMC 193
6.3.3 Restarting a running partition
The preferred method of restarting an active partition is to issue the following command:
PWRDWNSYS OPTION(*CNTRLD) DELAY(user specified delay) RESTART(*YES)
The default delay time for a controlled power down is 3600 seconds or one hour. Depending
on the particular circumstances, this value may need to be changed. A logical partition can
also be restarted using the HMC GUI:
1. Access the LPAR functions menu using one of the methods in 6.1, “Accessing LPAR
functions” on page 178.
2. Select Restart Partition. A dialog like the one in Figure 6-20 on page 193 is shown.
3. Several options are listed for reboot type. Immediate should rarely be used, if at all. Dump
and Dump Retry are discussed in 6.5.3, “Performing main storage dumps” on page 200.
4. Select the restart type and press OK to start. See Figure 6-20.
Figure 6-20 Partition restart options
Note: Activating a second profile for an active partition is not allowed and results in an
error. To switch profiles for an active partition, the first profile needs to be deactivated
(powered off) before the second profile can be activated (powered on).
Attention: Except under the direction of your next level of support, the use of the
Immediate reboot option is discouraged. This is an abnormal end of the system. Improper
use can result in an extremely long IPL and potentially in damaged objects.