Memory
problems
v
Follow
the
suggested
actions
in
the
order
in
which
they
are
listed
in
the
Action
column
until
the
problem
is
solved.
v
See
to
determine
which
components
are
customer
replaceable
units
(CRU)
and
which
components
are
field
replaceable
units
(FRU).
v
If
an
action
step
is
preceded
by
“(Trained
service
technician
only),”
that
step
must
be
performed
only
by
a
trained
service
technician.
Symptom
Action
The
amount
of
system
memory
that
is
displayed
is
less
than
the
amount
of
installed
physical
memory.
Note:
If
you
change
the
memory,
you
must
updated
the
memory
configuration
in
the
Configuration/Setup
Utility
program.
1.
Make
sure
that:
v
No
error
LEDs
are
lit
on
the
operator
information
panel
or
on
the
memory
card.
v
Memory
mirroring
does
not
account
for
the
discrepancy.
v
The
memory
modules
are
seated
correctly.
v
You
have
installed
the
correct
type
of
memory.
v
All
banks
of
memory
are
enabled.
The
server
might
have
automatically
disabled
a
memory
bank
when
it
detected
a
problem,
or
a
memory
bank
might
have
been
manually
disabled.
2.
Check
the
POST
error
log
for
error
message
289:
v
If
a
DIMM
was
disabled
by
a
system-management
interrupt
(SMI),
replace
the
DIMM.
v
If
a
DIMM
was
disabled
by
the
user
or
by
POST,
run
the
Configuration/Setup
Utility
program
and
enable
the
DIMM.
3.
Run
memory
diagnostics
(see
4.
Make
sure
there
is
no
memory
mismatch
when
the
server
is
at
the
minimum
memory
configuration
(two
1GB
DIMMs;
see
“Minimum
configuration”
on
page
5.
Add
one
pair
of
DIMMs
at
a
time,
making
sure
the
DIMMs
match
for
each
pair
added.
6.
Add
one
memory
card
at
a
time,
making
sure
the
memory
matches
for
each
card
added.
7.
Reseat
the
following
components:
a.
DIMM
b.
Memory
card
8.
Replace
the
components
listed
in
step
one
at
a
time,
in
the
order
shown,
restarting
the
server
each
time.
42
IBM
System
x3950
Type
8878
and
System
x3950
E
Type
8879:
Problem
Determination
and
Service
Guide
