AIX 5L Problem Determination - IBM Redbooks

3. Place the CD-ROM into the drive.
4. After a short period of time, you will see the Icons screen. At this point, press
F5 if you are using a graphics console, or 5 if you are using an ASCII terminal.
If you are using the graphics console, sometimes the display screen will have
power saving enabled, and will take time to warm up before anything can be
seen on the screen. This can cause you to miss the Icon screen display. In
this situation, observe the power LED on the display device, and when it
changes from orange to green, then press the F5 key (E1F1 LEDs are
shown).
After performing the previous steps, you will get various screens displayed, one
of which will indicate to you the SCSI address of the device that the machine is
booting from. Following this screen, the Diagnostic Entry screen is displayed.
4.2.4 Task selection or service aids
The diagnostics described in this section are known by two names: task selection
or service aids, depending upon the level of diagnostics you are using. Task
selection is the name used by AIX Version 4.3.2; however, in AIX Version 4.1.4,
the same menu is known as service aids. This portion of the diagnostic package
is equally as useful in the diagnosis of faults as the diagnostic routines
themselves. The next few sections will cover a selection of the service aids
available.
Local area network service aid
This service aid is useful in the diagnosis of network problems. It enables you to
type in IP addresses of both a source machine and a target machine. When
activated, it will tell you if it managed to connect to the target machine. If it failed,
it will try and give you a reason why it could not reach the destination host. The
result of this can help in fault diagnosis.
Microcode download
Using this service aid makes manipulation of microcode much easier than doing
it from the command line. As a result, you are less liable to make a mistake.
The microcode download facility is also available when using the Diagnostic
CD-ROM. This enables you to download microcode to devices that are not
capable of being updated when AIX is running.
SCSI bus analyzer
This is one of the most useful service aids. It enables you to issue a SCSI inquiry
command to any device on any SCSI bus connected to the machine. The results
that are returned give you a good idea of the problem.
52 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques