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Running the online diagnostics in concurrent mode

With concurrent mode, you can run the 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:
  • SCSI adapters connected to paging devices
  • Disk drive used for paging
  • Some display adapters and graphics-related devices
The following levels of testing are available in concurrent mode:
Share-test level
This level tests a resource while the resource is being shared by programs that are running in normal operation. This testing is limited to normal commands that test for the presence of a device or adapter.
Subtest level
This level tests a portion of a resource while the remaining part of the resource is being used in normal operation. For example, you could test one port of a multiport device while the other ports are being used in normal operation.
Full-test level
This level of testing requires the device to be unassigned, and not in use by another process. This level of testing on a disk drive might require the use of the vary off command. Use the diagnostics menus to vary off the resource that requires testing.

Perform the following steps to run online diagnostics in concurrent mode:

  1. Log in to the AIX® operating system as the root user, or use the CE login. If you need help, contact the system administrator.
  2. Enter diag to load the diagnostic controller and to display the online diagnostic menus.
  3. If requested, enter a password.
  4. When the Diagnostic Operating Instructions display is shown, follow the online instructions to check the wanted resources.
    Note: If you do not see the Diagnostic Operating Instructions display, try to run the stand-alone diagnostics.
  5. When testing is complete, press F3 (Exit) to return to the Diagnostic Operating Instructions display.
  6. Press F3 (Exit) again to return to the AIX operating system prompt.
  7. Vary on any resources that you varied off.
  8. Press Ctrl+D to log off from the root user or the CE login.
  9. When finished, contact your next level of support or your hardware service provider about any information you received during the diagnostics, including service request numbers (SRNs).
Parent topic: Running the online diagnostics
Related concepts:
Using the problem reporting forms
Related tasks:
Running stand-alone diagnostics

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Last updated: Mon, June 02, 2014