Accessing dedicated service tools
This information covers how to start dedicated service tools (DST).
You can start DST in the following ways:
- Performing an IPL to DST (see Performing an IPL to dedicated service tools).
- Pressing the System Request key while the system is operational.
- Selecting function 21 while the system is operational (see Selecting function 21 from the control panel).
This is available from the primary partition only.
- Performing an alternate IPL to DST (type D IPL) (see Performing an alternate IPL to DST (type D IPL)).
After performing a type D IPL on a primary partition, the first step in DST must be configuration recovery.
- Pressing F16, which is not displayed, while in DST debug mode during a step-mode IPL.
