Concurrent Mode; Running The Online Diagnostics In Concurrent Mode - IBM Enterprise Server S80 User Manual

Concurrent Mode

Concurrent mode provides a way 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, some of the resources cannot be
tested in concurrent mode. 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).
There are three levels of testing 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 may 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 on to the AIX
operating system and have proper authority to issue the commands (if needed get help
from 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, use the following steps:
1. Log on to the AIX operating system as root or superuser (su).
2. Enter the diag command.
3. When the DIAGNOSTIC OPERATING INSTRUCTIONS display, follow the
instructions to check out the desired resources.
4. When testing is complete; use the 3 key to return to the DIAGNOSTIC OPERATING
INSTRUCTIONS. Then press the 3 key again to return to the AIX operating system
prompt. Be sure to vary on any resource you had varied to off.
5. Press the Ctrl-D key sequence to log off from root or superuser (su).
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S80 and S85 User's Guide