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Step 4
Determine if the operating system is accepting commands.
Is the operating system accepting commands?
NO The system must be turned off in order to run diagnostics.
Verify with the system administrator and users that the system can be
turned off. If so, turn off the system unit and go to “Step 7” on
page 159.
YES Go to “Step 5”.
Step 5
Diagnostic tests can be run on many resources while the operating system is running.
However, you can obtain more extensive problem isolation by running online
diagnostics in service mode.
Do you want to run the online diagnostics in service mode?
NO Go to “Step 6”.
YES Do the following to shut down your system:
1. At the system prompt, stop the operating system using the
appropriate command for your operating system.
2. After the operating system is stopped, turn off the system unit.
3. Go to “Step 7” on page 159.
Step 6
This step invokes the online diagnostics in concurrent mode.
1. Log in as root user.
2. Enter the diag command.
3. Wait until the Diagnostic Operating Instructions are displayed, or wait for three
minutes.
Are the Diagnostic Operating Instructions displayed without any obvious console
display problems?
NO Do the following to shut down your system:
1. At the system prompt, stop the operating system using the
appropriate command for your operating system.
2. After the operating system is stopped, turn off the system unit.
3. Go to “Step 7” on page 159.
YES Go to “Step 10” on page 160.
158 pSeries 630 Model 6C4 and Model 6E4 User’s Guide