Start the system without making configuration changes (unattended IPL)

This is the most common way to start the iSeries™ server. This topic provides instruction on how to start your system during normal operation.

Prerequisites

This procedure assumes the iSeries server is running, and requires that several additional conditions be met before you begin an initial program load (IPL). While most of these settings are the default values, you must verify them if you are unsure.

The IPL mode for the iSeries server must be set to Normal (unattended IPL).
The Type of restart (QIPLTYPE) system value must be set to unattended (0).
Turn on any devices, such as display stations, printers, tape devices, and controllers you or others may want to use.

Situation

Unattended IPLs reset system storage and recognize any configuration changes automatically. The amount of time required for any IPL depends on the size and complexity of the system, ranging from a few minutes to several hours. When the unattended IPL is complete, the Sign On display appears on the display station.

Note: If you are working on a system that has logical partitions, you need to understand how to restart and turn off the system with logical partitions.

To perform an unattended IPL

Enter different options on the command line to perform an unattended IPL.

Type ENDSYS or ENDSBS *ALL on any command line and press Enter.
Note: More options are available for the End System (ENDSYS) and the End Subsystem (ENDSBS) commands, for example, to set delay time.
Type WRKSBS to verify that the controlling subsystems have ended and are in the restricted state. The subsystems status must be RSTD.
Type PWRDWNSYS *IMMED RESTART(*YES) on any command line and press Enter.

When the unattended IPL is done, the sign on display appears on the display station. To schedule an unattended IPL, see Schedule a system shutdown and restart.