IBM SY44-5902-05 manual System paging environments, Stand-alone paging non-paging, Limited paging

vOne workstation for each system partition.

vA valid service tools user ID and password to sign on to DST. IBM supplies service tools user IDs that have different levels of privileges. See “Work with service tools user IDs” on page 25 for more information.

To make a printout, attach the printer to the workstation I/O processor or storage media unit that is performing the service function. The printer that is used with DST for service tool output must be an SCS-type data stream printer (for example, type 5224).

System paging environments

The amount of assistance that software provides for service depends on how you perform the system IPL. The service tools and functions that are available depend on how you access DST and which operating system is in use. Service environments for the system are:

vStand-alone (also called non-paging)

vLimited paging

vFull paging

Stand-alone paging (non-paging)

You can reach this environment only by performing an alternate IPL to DST (see “Performing an alternate IPL to DST (type D IPL)” on page 8).

You can access dedicated service tools (DST) while the system is in the stand-alone paging environment, but not all DST options are available. In this environment, no operating system is available, and only some functions of Licensed Internal Code are operational.

The following options are available in the stand-alone environment for all operating systems:

vInstall Licensed Internal Code

vWork with disk units

vWork with DST environment

vStart a service tool

vWork with remote service support

For a description of each option, see “DST options” on page 10.

Attention: Performing an IPL on the primary partition will cause an IPL of all secondary partitions.

Limited paging

You can reach this environment by performing an IPL to DST (see “Performing an IPL to DST” on page 4).

The limited paging environment is the first servicing environment you access when you start to bring up the system in Manual mode. This environment contains all the functions of the Licensed Internal Code, including storage management.

You can access dedicated service tools (DST) while the system is in the limited paging environment. This environment accesses the temporary files that are needed and the Licensed Internal Code on the load-source disk. The operating system is not available.

2Service Functions V5R2