BR0
BR0
BR1
BR1
DIMM 7
DIMM 8
DIMM 9
CH2
DIMM 7
DIMM 8
DIMM 9
CH2
DIMM 10
DIMM 11
DIMM 12
CH3
DIMM 10
DIMM 11
DIMM 12
CH3
Rank 0
Rank 0 512 MB
Rank 4 1 GB
Rank 2 512 MB
Rank 1
Rank 1 Empty
Rank 5 Empty
Rank 3 512 MB
Minimum configuration: one pair of DIMMs
Other Configuration: Multiple Pairs of DIMMs
(Branch 0 works independently of Branch 1)
(Branch 0 works independently of Branch 1)
Rank 4 is used to spare any defective rank of rank 0, 2, and 3
A pair of two identical
double rank modules:
same size, speed,
and organization
Rank 1 is sparing to Rank 0
DIMM 1
DIMM 1
DIMM 2
DIMM 2
DIMM 3
DIMM 3
CH0
CH0
DIMM 4
DIMM 4
DIMM 5
DIMM 5
DIMM 6
DIMM 6
CH1
CH1
A pair of two identical
single rank modules
(512MB)
A pair of two identical
single rank modules
(1GB)
A pair of two identical
double rank modules
(1GB)
-
A
rank
is
defined
as
an
area
or
block
of
64
bits
that
is
created
by
using
some
or
all
of
the
chips
on
a
DIMM.
For
an
ECC
DIMM,
a
memory
rank
is
a
block
of
72
data
bits
(64
bits
plus
8
ECC
bits).
-
The
minimum
memory
configuration
is
two
single-rank
DIMMs
that
are
installed
in
branch
0,
DIMM
connector
1
(in
channel
0)
and
connector
4
(in
channel
1);
however,
online-sparing
is
not
supported
with
this
configuration.
-
To
support
online-sparing
in
branch
0,
you
must
add
a
second
pair
of
DIMMs.
The
spare
pair
of
DIMMs
can
be
single-rank
or
double-rank
and
must
be
the
same
speed,
type,
size
(or
larger),
and
technology
as
the
failed
pair
of
DIMMs.
The
spare
pair
must
be
installed
in
branch
0,
DIMM
connector
2
(in
channel
0)
and
connector
5
(in
channel
1).
Branch
0
and
branch
1
operate
independently.
v
The
following
notes
apply
when
the
server
operates
in
non-mirroring
mode
(normal
mode):
–
DIMMs
must
be
installed
in
matched
pairs.
If
you
install
a
second
pair
of
DIMMs
in
DIMM
connector
7
and
DIMM
connector
10,
they
do
not
have
to
be
the
same
size,
speed,
type,
and
technology
as
the
DIMMs
in
DIMM
connector
14
IBM
System
x3500
Type
7977:
Installation
Guide
Содержание x3500 - System - 7977
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