Running online diagnostics in concurrent mode

Use this procedure to run the online diagnostics in 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:
  • SCSI adapters connected to paging devices
  • Disk drive used for paging
  • Some display adapters and graphics related devices
The following levels of testing exist in concurrent mode:
Share-test level
This 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.
Sub-test 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 requires the device to not be assigned or used by any other operation. This level of testing on a disk drive might require the use of the vary off command. Use the diagnostics display menus to allow you to vary off the needed resource.

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

  1. Log in to the AIX® operating system as root user, or use CE login. If you need help, contact the system administrator.
  2. Enter the diag command to load the diagnostic controller, and display the online diagnostic menus.
  3. If requested, enter a password.
  4. When the Diagnostic Operating Instructions screen displays, follow the online instructions to check the desired resources.
    Note: If you do not receive the Diagnostic Operating Instructions display, try to run the stand-alone diagnostics. For details, see Running the stand-alone hardware diagnostics.
  5. When testing is complete, press F3 to return to the Diagnostic Operating Instructions display.
  6. Press F3 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 root user or CE login.
  9. When finished, contact your next level of support or your hardware service provider with any information you received during the diagnostics, including service request numbers (SRNs).
Parent topic: Running the online diagnostics


Last updated: Mon, March 23, 2020