User`s guide

5-4
ESCALA T610 and PL 600T User’s Guide
Note: Pressing the F3 key (from a defined terminal) produces a Confirm Exit menu which
offers two options: continuing with the shutdown by pressing the F3 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
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
• Memory (tested during POST)
• Processor (tested during POST)
Three levels of testing exist in concurrent mode:
• 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.
• 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.
• 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 might 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 help is needed, see
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 F3 key to return to the DIAGNOSTIC OPERATING
INSTRUCTIONS. Press the F3 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).