Methods to perform IPL

Methods used to perform IPL.

Table 1. Methods to perform IPL
Methods	Description
POR	Power on reset IPL. The system was powered off and powered on. During the power on, all hardware runs diagnostic tests if the IPL speed is set to slow. If the IPL speed is set to fast, some diagnostic functions will be overridden. For more information on IPL speeds, see IPL type, mode, and speed options. You can perform this IPL from either the control panel or the Hardware Management Console (HMC). For information on the control panel, see Control panel functions. For information on using the HMC, see Powering on and off the system using HMC.
F03	Attention: No system shutdown is performed before the IPL. The use of this function can cause loss of data. Control panel Function 03 starts a Load IPL. This differs from a POR IPL because no power off and power on sequence is done. This means a system shutdown is not performed and not all hardware diagnostics are performed during the IPL. Input-output processors (IOP) are reset using a software POR equivalent. You can perform this IPL from either the control panel or the Hardware Management Console (HMC). For information on the control panel, see Control panel functions. For information on using the HMC, see Powering on and off the system using HMC.
Programmed IPL without parameters	This IPL is started by the operating system. A PWRDWNSYS command with RESTART (*YES) will initiate this IPL.
Remote power on	An unattended IPL is started from a remote location. Normal mode must be selected, the system power must be turned off, and the user must set specific indicators (see the system operation information).
Automatic restart	An unattended IPL is started automatically after a power failure. Normal mode must be selected and the user must set specific indicators (see the system operation information).
Power on by date/time	This IPL is started by an internal clock. Normal mode must be selected and the user must set specific indicators (see the system operation information).