Methods to perform IPL
This topic provides information about methods that can be used to perform an 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 management console. For information about the control panel, see Control panel functions. For information about using the HMC, see Managing the 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 management console. |
| 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). |
