Chapter
9.
Hardware
Problem
Determination
This
chapter
provides
information
on
using
standalone
or
online
diagnostics
to
help
you
solve
hardware
problems.
You
may
obtain
more
extensive
problem
isolation
by
running
online
diagnostics
in
service
mode.
This
requires
that
the
partition
be
rebooted
(in
a
partitioned
system)
with
no
other
users
on
that
partition
or
that
the
system
be
rebooted
(in
a
full
system
partition)
with
no
other
users
on
the
system.
Alternatively,
if
AIX
online
diagnostics
are
installed
on
the
partition
or
system,
you
can
run
online
diagnostics
in
concurrent
mode.
If
the
system
or
partition
does
not
have
AIX
diagnostics
installed,
or
if
you
cannot
boot
AIX
or
online
diagnostics
in
service
mode,
run
standalone
diagnostics
instead.
Problem
Determination
Using
the
Standalone
or
Online
Diagnostics
Use
this
procedure
to
obtain
a
service
request
number
(SRN)
when
you
load
the
standalone
or
online
diagnostics.
If
you
are
unable
to
load
the
standalone
or
online
diagnostics,
go
to
“Problem
Determination
When
Unable
to
Load
Diagnostics”
on
page
120.
The
service
organization
uses
the
SRN
to
determine
which
field
replaceable
units
(FRUs)
are
needed
to
restore
the
system
to
correct
operation.
Step
1.
Considerations
before
Running
This
Procedure
Note:
To
find
the
key
sequences
you
need
for
your
Hardware
Management
Console
for
pSeries
(HMC)
virtual
terminal
window
to
respond
to
the
diagnostic
programs,
see
the
IBM
Hardware
Management
Console
for
pSeries
Installation
and
Operations
Guide
.
v
The
diagnostics
may
be
run
within
a
virtual
terminal
window
on
the
HMC
connected
to
the
system.
v
This
procedure
requires
that
you
select
the
type
of
diagnostics
you
want
to
run.
v
Go
to
“Step
2.”
Step
2
Are
the
online
diagnostics
installed
on
this
system?
NO
Go
to
“Step
6”
on
page
116.
YES
Go
to
“Step
3.”
Step
3
Determine
if
the
partition
is
accepting
commands.
Is
the
operating
system
accepting
commands?
NO
If
a
partition
is
not
accepting
commands
(or
if
the
partition
has
an
operating
system
other
than
AIX
installed),
run
standalone
diagnostics.
YES
Go
to
“Step
4.”
Step
4
Diagnostic
tests
can
be
run
on
many
resources
while
the
operating
system
is
running.
However,
you
can
obtain
more
extensive
problem
isolation
by
running
online
diagnostics
in
service
mode.
Do
you
want
to
run
the
online
diagnostics
in
service
mode?
NO
Go
to
“Step
5”
on
page
116.
YES
Go
to
“Step
6”
on
page
116.
115
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