Note: Pressing

the

3

key

(from

a

defined

terminal)

produces

a

Confirm

Exit popup

menu

which

offers

two

options: continuing

with

the shut

down

by

pressing

the

3

key;

or

returning

to

diagnostics

by

pressing Enter.

 

 

For undefined terminals, pressing 99 produces a

full-screen menu which

offers two options: continuing with the shutdown

by pressing 99 and then

Enter;

or

returning

to

diagnostics by

pressing

Enter.

 

 

 

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 b tested in concurrent mode. The following resources cannot be tested in concurrent mode:

Ÿ SCSI adapters connected to paging devices

Ÿ Disk drive used for paging

Ÿ Some display adapters and graphics related devices

Ÿ Memory (tested during POST)

ŸProcessor (tested during POST).

There are three levels of testing in concurrent mode:

ŸThe 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.

ŸThe 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

port of a multiport device

while the other ports are being

used

in normal

operation.

 

 

 

ŸThe full-test level requires the device not be assigned to or used by any other operation. This level of testing on a disk drive mayvaryoffrequire the use of the 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 operating system and have proper authority to issue the help from the system operator).

be logged on to the AI commands (if needed ge

Chapter 5. Using the Online and Standalone Diagnostics5-11

Page 143
Image 143
IBM B50 manual Concurrent Mode