IBM 8688 Manuale Utente
Chapter
3.
Diagnostics
This
section
provides
basic
troubleshooting
information
to
help
you
resolve
some
common
problems
that
might
occur
with
your
server.
If
you
cannot
locate
and
correct
the
problem
using
the
information
in
this
section,
see
for
more
information.
General
checkout
The
server
diagnostic
programs
are
stored
in
the
upgradeable
electronically
erasable
programmable
read-only
memory
(EEPROM)
on
the
I/O
board
and
on
the
Resource
CD.
These
programs
provide
the
primary
methods
of
testing
the
major
components
of
the
server.
If
you
cannot
determine
whether
a
problem
is
caused
by
the
hardware
or
by
the
software,
run
the
diagnostic
programs
to
confirm
that
the
hardware
is
working
properly.
Note:
A
single
problem
might
cause
several
error
messages.
When
this
occurs,
work
to
correct
the
cause
of
the
first
error
message.
After
you
correct
the
cause
of
the
first
error
message,
the
other
error
messages
usually
will
not
occur
the
next
time
you
run
the
test.
A
failed
server
might
be
part
of
a
shared
hard
disk
drive
cluster
(two
or
more
servers
sharing
one
or
more
external
storage
devices).
Before
you
run
diagnostics,
verify
that
the
failing
server
is
not
part
of
a
shared
storage
device
cluster.
A
server
might
be
part
of
a
cluster
if:
v
The
server
is
identified
as
part
of
a
cluster.
v
One
or
more
external
storage
units
are
attached
to
the
server
and
at
least
one
of
the
attached
storage
units
is
also
attached
to
another
server
or
unidentifiable
source.
v
One
or
more
servers
are
located
near
the
failing
server.
If
the
failing
server
is
suspected
to
be
part
of
a
shared
hard
disk
drive
cluster,
run
all
diagnostic
tests
except
those
that
test
the
storage
unit
(storage
device
residing
in
the
storage
unit)
or
the
storage
adapter
attached
to
the
storage
unit.
Notes:
1.
For
servers
that
are
part
of
a
shared
hard
disk
drive
cluster,
run
one
test
at
a
time
in
looped
mode.
Do
not
run
all
tests
in
looped
mode,
because
this
could
enable
the
hard
disk
drive
diagnostic
tests.
2.
If
multiple
error
codes
are
displayed,
diagnose
the
first
error
code
that
is
displayed.
3.
If
the
server
stops
with
a
POST
error,
see
4.
If
the
server
stops
and
no
error
is
displayed,
see
5.
For
power
supply
problems,
see
6.
For
safety
information,
see
7.
For
intermittent
problems,
check
the
system-error
log.
©
Copyright
IBM
Corp.
2003
33