Accessing Dedicated Service Tools; Selecting Function 21 From The Control Panel - IBM Power System POWER7 Series Common Service Procedures

DST operates in stand-alone, limited, and full paging environments. The DST tools and functions vary
depending on the paging environment and the release level of the operating system.
Dedicated service tools requirements
Note: It is a requirement to change the password the first time anyone signs on to DST or SST. The
authorized service provider needs to give the new or changed password to the customer or have the
customer change the password.
To use DST, you must have the following items:
v The disk that contains the Licensed Internal Code, which is shown as the load-source disk.
Note: When you perform an alternate initial program load (IPL) to DST, you do not need the
load-source disk.
v An operational workstation on bus 1 as either a primary console or an operations console.
v One workstation capable of communicating with each system partition.
v A valid service tools user ID and password to sign on to DST. IBM supplies service tools user IDs that
have different levels of privileges.
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.

Accessing dedicated service tools

This information covers how to start dedicated service tools (DST).
You can start DST in the following ways:
v Performing an IPL to DST (see "Performing an IPL to dedicated service tools" on page 50).
v Pressing the System Request key while the system is operational.
v Selecting function 21 while the system is operational (see "Selecting function 21 from the control
panel").
This is available from the primary partition only.
v Performing an alternate IPL to DST (type D IPL) (see "Performing an alternate IPL to DST (type D
IPL)" on page 51).
After performing a type D IPL on a primary partition, the first step in DST must be configuration
recovery.
v Pressing F16, which is not displayed, while in DST debug mode during a step-mode IPL.

Selecting function 21 from the control panel

Use this information to learn about the detailed instructions for selecting function 21 while the system is
operational.
Perform the following steps:
1. Select control panel function 21 (Make DST available).
Select manual mode, and then push the increment (↑) or decrement (↓) button on the control panel
until 21 is shown in the Function/Data display. Press the Enter button on the control panel.
Note: If you enter function 21 and the primary console is powered off or not usable, reference code
A600 500x is shown on the control panel. Enter Function 21 again to force the DST Sign On display to
be shown on one of the alternative consoles.
The primary console or alternative console shows the DST sign-on display.
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