Table
4.
Alternate
memory
card
installation
sequence
Installation
order
Memory
card
DIMM
pair
First
1
1
and
3
2
and
4
Second
3
1
and
3
2
and
4
Third
2
1
and
3
2
and
4
Fourth
4
1
and
3
2
and
4
Table
5.
Memory
card
installation
sequence
for
memory-mirrored
configuration
Installation
order
Memory
card
DIMM
pair
First
1
1
and
3
3
1
and
3
Second
2
1
and
3
4
1
and
3
Third
1
2
and
4
3
2
and
4
Fourth
2
2
and
4
4
2
and
4
v
There
are
two
memory
power
buses,
which
are
split
between
the
four
memory
cards.
Memory
cards
1
and
2
are
on
power
bus
1,
and
memory
cards
3
and
4
are
on
power
bus
2.
If
memory
mirroring
is
enabled,
you
can
hot-replace
one
memory
card
at
a
time
on
each
memory
power
bus.
v
If
a
problem
with
a
DIMM
is
detected,
light
path
diagnostics
will
light
the
system-error
LED
on
the
front
of
the
server,
indicating
that
there
is
a
problem
and
guide
you
to
the
defective
DIMM.
When
this
occurs,
first
identify
the
defective
DIMM;
then,
remove
and
replace
the
DIMM.
The
following
illustration
shows
the
LEDs
on
the
memory
card.
Memory Hot-Swap Enabled
Memory Port Power
Error
Memory
Hot-Swap
Enabled
LED:
When
this
LED
is
lit,
it
indicates
that
hot-swap
memory
is
enabled.
Error
LED:
When
this
LED
is
lit,
it
indicates
that
a
memory
card
or
DIMM
has
failed.
Memory
Port
Power
LED:
When
this
LED
is
off,
it
indicates
that
power
is
removed
from
the
port
and
that
you
can
remove
the
memory
card
and
replace
a
failed
DIMM.
This
LED
also
turns
off
when
the
release
levers
are
opened.
36
IBM
System
x3800
Type
8865:
User’s
Guide
Содержание x3800 - System - 8865
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