IBM 887022X Maintenance Manual - Page 117

Active, Memory

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DIMM Figure 58. DIMM installation Active Memory Active Memory is an IBM technology that improves the reliability of the DIMMs through memory mirroring, memory scrubbing, and Memory ProteXion™ features. The following notes describe the Active Memory features: v Memory mirroring allows you to improve the memory reliability of the server by creating a mirror of the data in memory port one and storing it in memory port two. Note: When using memory mirroring, the DIMMs in each partner bank must be the same size and clock speed. For example, if the DIMMs in port 1, bank 1 are 512 MB, then the DIMMs in port 2, bank 1 (the partner bank) must also be 512 MB (see Table 5 on page 106 for port and bank assignments). Complete the following steps to enable memory mirroring: 1. Check your operating system documentation to be sure that it supports memory mirroring. 2. Install DIMMs of the same size and clock speed in the two memory ports. 3. Enable memory mirroring in the Configuration/Setup Utility: a. Turn on the server and watch the monitor screen. b. When the message Press F1 for Configuration/Setup appears, press F1. c. From the Configuration/Setup Utility main menu, select Advanced Setup. d. Select Memory Settings. Chapter 4. Installing options 107

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Active
Memory
Active
Memory
is
an
IBM
technology
that
improves
the
reliability
of
the
DIMMs
through
memory
mirroring,
memory
scrubbing,
and
Memory
ProteXion
™
features.
The
following
notes
describe
the
Active
Memory
features:
v
Memory
mirroring
allows
you
to
improve
the
memory
reliability
of
the
server
by
creating
a
mirror
of
the
data
in
memory
port
one
and
storing
it
in
memory
port
two.
Note:
When
using
memory
mirroring,
the
DIMMs
in
each
partner
bank
must
be
the
same
size
and
clock
speed.
For
example,
if
the
DIMMs
in
port
1,
bank
1
are
512
MB,
then
the
DIMMs
in
port
2,
bank
1
(the
partner
bank)
must
also
be
512
MB
(see
Table
5
on
page
106
for
port
and
bank
assignments).
Complete
the
following
steps
to
enable
memory
mirroring:
1.
Check
your
operating
system
documentation
to
be
sure
that
it
supports
memory
mirroring.
2.
Install
DIMMs
of
the
same
size
and
clock
speed
in
the
two
memory
ports.
3.
Enable
memory
mirroring
in
the
Configuration/Setup
Utility:
a.
Turn
on
the
server
and
watch
the
monitor
screen.
b.
When
the
message
Press
F1
for
Configuration/Setup
appears,
press
F1.
c.
From
the
Configuration/Setup
Utility
main
menu,
select
Advanced
Setup
.
d.
Select
Memory
Settings
.
DIMM
Figure
58.
DIMM
installation
Chapter
4.
Installing
options
107