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Table 1. DST options (continued)
DST options
Paging environment
D-IPL (non-paging) Limited Full
Work with disk units Yes Yes Yes
Work with DST environment Yes Yes Yes
Work with Licensed Internal Code No Yes Yes
Work with remote service support Yes Yes Yes
Work with save storage and restore storage No Yes¹ No
Work with system partitions No Yes¹ Yes¹
Work with system capacity No Yes Yes
Work with system security No Yes Yes
Note: ¹ Indicates that this option is operating system-dependent. It is available only under certain operating
systems (see Appendix A, “OS/400 Operating System” on page 281).
Installing Licensed Internal Code
This option allows you to install or restore Licensed Internal Code. For more
information on how to use this option, see “Utilities to Install and Restore Licensed
Internal Code” on page 225.
Attention: Doing this to a system with multiple partitions can cause damage to
the partition configuration and loss of data.
This option is available only in the stand-alone environment.
Installing the operating system
Select the Install the operating system option from the Use Dedicated Service (DST)
Tools display.
This option installs the operating system from removable media (for example,
tape). The present operating system (if any) is replaced. Use this option to install a
new release of the presently installed operating system or to install the operating
system after a failure. You must run this option from the primary console.
This option is not available under basic DST authority. For more information about
authority, see “Work with service tools user IDs” on page 25.
Perform an IPL
Select the Perform an IPL option from the Use Dedicated Service Tools (DST)
display.
This option allows you to load and start the operating system from the disk. If you
have installed the Licensed Internal Code and there is no operating system
installed, load and start the operating system from the same removable media
device as the Licensed Internal Code.
Work with Licensed Internal Code
This option applies PTFs, removes PTFs, or makes PTFs permanent to the system
Licensed Internal Code from removable media when the operating system is not
available. It also allows you to rebuild the Licensed Internal Code, display the
Chapter 1. Dedicated Service Tools (DST) 11