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Note: If you are unable to load the diagnostics to the point when the DIAGNOSTIC
OPERATING INSTRUCTIONS display, go to “Step 2.5 Loading the Standalone
Diagnostics from CD-ROM” on page 142.
Concurrent Mode
Use concurrent mode to run online diagnostics on some of the system resources while
the system is running normal activity.
Because the system is running in normal operation, the following resources cannot be
tested in concurrent mode:
v SCSI adapters connected to paging devices
v Disk drive used for paging
v Some display adapters and graphics related devices
v Memory (tested during POST)
v Processor (tested during POST)
The following levels of testing exist in concurrent mode:
v The share-test level tests a resource while the resource is being shared by
programs running in the normal operation. This testing is mostly limited to normal
commands that test for the presence of a device or adapter.
v The sub-test level tests a portion of a resource while the remaining part of the
resource is being used in normal operation. For example, this test could test one port
of a multiport device while the other ports are being used in normal operation.
v The full-test level requires the device not be assigned to or used by any other
operation. This level of testing on a disk drive might require the use of the varyoff
command. The diagnostics display menus to allow you to vary off the needed
resource.
Error-log analysis is done in concurrent mode when you select the Problem
Determination option on the DIAGNOSTIC MODE SELECTION menu.
To run the online diagnostics in concurrent mode, you must be logged in to the AIX
operating system and have proper authority to issue the commands (if help is needed,
see the system operator).
The diag command loads the diagnostic controller and displays the online diagnostic
menus.
Running the Online Diagnostics in Concurrent Mode
To run online diagnostics in concurrent mode, do the following:
1. Log in to the AIX operating system as root user or use CE Login.
2. Enter the diag command.
3. When the DIAGNOSTIC OPERATING INSTRUCTIONS display, follow the
instructions to check out the desired resources.
86 Eserver pSeries 690 User’s Guide