IBM 88743RU User Guide - Page 45

Active, Memory

Get IBM 88743RU - System x3950 E PDF manuals and user guides
UPC - 000435945938
View all IBM 88743RU manuals
Add to My Manuals
Save this manual to your list of manuals

Page 45 highlights

Table 4. Alternate memory card installation sequence (continued) Memory card order Memory card DIMM pair Fourth 4 1 and 3 2 and 4 Table 5. Memory card installation sequence for memory-mirrored configuration Memory card 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 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 Port Power Error Memory Hot-Swap Enabled 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 will also turn off when the release levers are opened. Note: Add odd numbered DIMMs to each available memory card first, then add the even numbered pairs. Active Memory Active Memory is an IBM technology that improves the reliability of the DIMMs through the memory mirroring, memory scrubbing, and Memory ProteXion™ features. Chapter 2. Installing options 33

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
Table
4.
Alternate
memory
card
installation
sequence
(continued)
Memory
card
order
Memory
card
DIMM
pair
Fourth
4
1
and
3
2
and
4
Table
5.
Memory
card
installation
sequence
for
memory-mirrored
configuration
Memory
card
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
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
will
also
turn
off
when
the
release
levers
are
opened.
Note:
Add
odd
numbered
DIMMs
to
each
available
memory
card
first,
then
add
the
even
numbered
pairs.
Active
Memory
Active
Memory
is
an
IBM
technology
that
improves
the
reliability
of
the
DIMMs
through
the
memory
mirroring,
memory
scrubbing,
and
Memory
ProteXion
™
features.
Chapter
2.
Installing
options
33