IBM x3800 User Guide - Page 50

Adding, replacing, memory

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When a recoverable error is found by memory scrubbing, the Memory ProteXion feature writes the data that was to be stored in the damaged memory locations to spare memory locations within the same DIMM. Adding and replacing a memory card At least one memory card with one pair of DIMMs must be installed for the server to operate correctly. Adding a memory card To add a memory card, complete the following steps: 1. Read the safety information that begins on page v and "Installation guidelines" on page 21. 2. Turn off the server and peripheral devices, and disconnect the power cords and all external cables necessary to replace the device. 3. Unlock the front cover (tower model only), and remove the top cover (see "Removing the front cover, top cover, and bezel" on page 23). 4. Prepare the memory card: a. Touch the static-protective package that contains the memory card to any unpainted surface on the outside of the server; then, remove the memory card from the package. b. Place the memory card on a flat, static-protected surface with the DIMM connectors facing up. c. Install DIMMs in the memory card (see "Installing DIMMs" on page 39). 5. Install the memory card: Attention: When moving the memory card, do not allow it to touch any components or structures inside the server. a. Grasp the memory card by the retention levers and turn the memory card so that the connector aligns with the connector on the microprocessor board. b. Insert the memory card into the memory card connector. c. Press the memory card into the connector and close the retention levers. If you have other options to install or remove, do so now; otherwise, go to "Completing the installation" on page 49. Hot-replacing a memory card For you to hot-replace a memory card, memory mirroring must be enabled. See "Active Memory" on page 37 for information about how to enable memory mirroring. To hot-replace a memory card, complete the following steps: 1. Read the safety information that begins on page v and "Installation guidelines" on page 21. Attention: Static electricity that is released to internal server components when the server is powered-on might cause the server to halt, which could result in the loss of data. To avoid this potential problem, always use an electrostatic-discharge wrist strap or other grounding system when working inside the server with the power on. 2. Remove the front cover (tower model only), and the top cover (see "Removing the front cover, top cover, and bezel" on page 23). 3. Prepare the new memory card: 38 IBM System x3800 Type 8865: User's Guide

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When
a
recoverable
error
is
found
by
memory
scrubbing,
the
Memory
ProteXion
feature
writes
the
data
that
was
to
be
stored
in
the
damaged
memory
locations
to
spare
memory
locations
within
the
same
DIMM.
Adding
and
replacing
a
memory
card
At
least
one
memory
card
with
one
pair
of
DIMMs
must
be
installed
for
the
server
to
operate
correctly.
Adding
a
memory
card
To
add
a
memory
card,
complete
the
following
steps:
1.
Read
the
safety
information
that
begins
on
page
v
and
“Installation
guidelines”
on
page
21.
2.
Turn
off
the
server
and
peripheral
devices,
and
disconnect
the
power
cords
and
all
external
cables
necessary
to
replace
the
device.
3.
Unlock
the
front
cover
(tower
model
only),
and
remove
the
top
cover
(see
“Removing
the
front
cover,
top
cover,
and
bezel”
on
page
23).
4.
Prepare
the
memory
card:
a.
Touch
the
static-protective
package
that
contains
the
memory
card
to
any
unpainted
surface
on
the
outside
of
the
server;
then,
remove
the
memory
card
from
the
package.
b.
Place
the
memory
card
on
a
flat,
static-protected
surface
with
the
DIMM
connectors
facing
up.
c.
Install
DIMMs
in
the
memory
card
(see
“Installing
DIMMs”
on
page
39).
5.
Install
the
memory
card:
Attention:
When
moving
the
memory
card,
do
not
allow
it
to
touch
any
components
or
structures
inside
the
server.
a.
Grasp
the
memory
card
by
the
retention
levers
and
turn
the
memory
card
so
that
the
connector
aligns
with
the
connector
on
the
microprocessor
board.
b.
Insert
the
memory
card
into
the
memory
card
connector.
c.
Press
the
memory
card
into
the
connector
and
close
the
retention
levers.
If
you
have
other
options
to
install
or
remove,
do
so
now;
otherwise,
go
to
“Completing
the
installation”
on
page
49.
Hot-replacing
a
memory
card
For
you
to
hot-replace
a
memory
card,
memory
mirroring
must
be
enabled.
See
“Active
Memory”
on
page
37
for
information
about
how
to
enable
memory
mirroring.
To
hot-replace
a
memory
card,
complete
the
following
steps:
1.
Read
the
safety
information
that
begins
on
page
v
and
“Installation
guidelines”
on
page
21.
Attention:
Static
electricity
that
is
released
to
internal
server
components
when
the
server
is
powered-on
might
cause
the
server
to
halt,
which
could
result
in
the
loss
of
data.
To
avoid
this
potential
problem,
always
use
an
electrostatic-discharge
wrist
strap
or
other
grounding
system
when
working
inside
the
server
with
the
power
on.
2.
Remove
the
front
cover
(tower
model
only),
and
the
top
cover
(see
“Removing
the
front
cover,
top
cover,
and
bezel”
on
page
23).
3.
Prepare
the
new
memory
card:
38
IBM
System
x3800
Type
8865:
User’s
Guide