Note: The termPOST indicator refers to the Icons (graphic display) or devicemnemonics (ASCII terminal) that are displayed while the POST isexecuting.6. Enter any requested password.7. Follow any instructions to select a console.8. After the diagnostic controller loads, DIAGNOSTIC OPERATING INSTRUCTIONSappear on the console display.9. Follow the displayed instructions to check out the desired resources.10. When testing is complete, use the F3 key to return to the DIAGNOSTICOPERATING INSTRUCTIONS.11. Press the F3 key (from a defined terminal) or press 99 (for an undefined terminal)to shut down the diagnostics before turning off the system unit.Note: Pressing the F3 key (from a defined terminal) produces a Confirm Exit menucontaining two options:v Continue with the shutdown by pressing F3.v Return to diagnostics by pressing Enter.For undefined terminals, pressing 99 produces a menu containing two options:v Continue with the shutdown by pressing 99, then Enterv Return to diagnostics by pressing Enter.Concurrent ModeConcurrent mode provides a way to run Online diagnostics on some of the systemresources while the system is running normal activity.Because the system is running in normal operation, some of the resources cannot betested. The following resources cannot be tested in concurrent mode:v SCSI adapters connected to paging devicesv Disk drive used for pagingv Any graphics-related device if running X, CDE, or windowing environment.v Memoryv ProcessorThree levels of testing are available in concurrent mode:v The share-test level tests a resource while the resource is being shared byprograms running in the normal operation. This testing is mostly limited to normalcommands 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 theresource is being used in normal operation. For example, this test could test one portof 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 otheroperation. This level of testing on a disk drive might require the use of the varyoffcommand. The diagnostics display menus allow you to vary off the needed resource.110 User’s Guide
