120Rh-1
Standard memory mode
Memory Mirroring
Configuration
Functions
Capacity
Hot plug
Reliability
data1
データ
1
data2
データ
2
Da
ta
3
データ
3
Mirrored
Memory Mirroring / On-line Spare Memory
MB
Memory branch #0
Memory branch #1
MB
Memory branch #0
Memory branch #1
On-line Spare Memory
Mirrored set
=
=
=
Group#1
DIMM#11,#21
Group#2
DIMM#31,#41
Group#3
DIMM#12,#22
Group#4
DIMM#32,#42
Group#5
DIMM#13,#23
Group#6
DIMM#33,#43
Physical
capacity
Logical
capacity
2GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
4GB
4GB
4GB
4GB
4GB
4GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
1GB
2GB
1GB
2GB
1GB
1GB
1GB
1GB
1GB
1GB
1GB
1GB
2GB
2GB
2GB
2GB
4GB
4GB
2GB
2GB
2GB
2GB
4GB
4GB
4GB
4GB
4GB
4GB
4GB
4GB
4GB
4GB
4GB
4GB
2GB
2GB
2GB
2GB
1GB
1GB
1GB
1GB
4GB
6GB
8GB
8GB
10GB
10GB
12GB
12GB
14GB
14GB
16GB
16GB
20GB
24GB
2GB
3GB
4GB
4GB
5GB
5GB
6GB
6GB
7GB
7GB
8GB
8GB
10GB
12GB
combination1
combination2
combination3
combination4
combination5
combination6
combination7
combination8
combination9
combination10
combination11
combination12
combination13
combination14
Group#1
Group#2
Group#3
Group#4
Group#5
Group#6
The mirrored branch
must have the same
DIMMs in the same
positions as
configured on the
primary branch.
MemoryBranch#0
MemoryBranch#1
Memory combinations for memory mirroring
=
=
=
=
MB
8GB
8GB
8GB
8GB
8GB
8GB
48GB
24GB
combination22
Memory branch #0
Memory branch #1
2GB
:standard
Group#1
DIMM#11
DIMM#12
DIMM#13
DIMM#21
DIMM#22
DIMM#23
DIMM#31
DIMM#32
DIMM#33
DIMM#41
DIMM#42
DIMM#43
Group#3
Group#5
Group#2
Group#4
Group#6
Memory Branch #0
Memory Branch #1
Chipset (Memory Controller)
The 120Rh-1 supports memory mirroring and online spare memory as standard to improve memory reliability.
• Follow the rules for installing memory DIMMs.
• To enable online spare memory, go to BIOS Setup.
• You cannot use the standard memory mode, memory mirroring, and online spare memory at the same time in the same
system.
Not redundant
(default)
Same as physical capacity
Not removable during operation
Not redundant
In the event
of a memory
failure, a
spare DIMM
takes over a
faulty DIMM
online.
A faulty DIMM automatically fails over to a
spare memory on the same memory branch.
Physical capacity does not include spare
memory.
Not removable during operation
A faulty DIMM automatically fails over to a
spare memory on the same memory branch.
Data mirrored between memory branch #0
and #1
Half the physical capacity
Not removable during operation
Fully redundant
• The branch #0 and #1 must be identical in DIMM configuration
(size and position).
• No mirroring can be configured between the DIMMs on the same
memory branch.
Requirements for Memory Mirroring
Requirements for Online Spare Memory
• Memory sizes must be the same across memory groups on the
same memory branch.
• Memory sizes may vary by memory branches.
• The memory groups farthest from the memory branches are spares.
Memory Mirroring
and Online Spare
Memory are not
available at the same
time.
Memory combinations for Online Spare Memory
Memory branch #0
12GB
16GB
8GB
8GB
7
20GB
24GB
8GB
8GB
8GB
8
10GB
12GB
4GB
4GB
4GB
6
6GB
8GB
4GB
4GB
5
5GB
6GB
2GB
2GB
2GB (std.)
4
3GB
4GB
2GB
2GB (std.)
3
2GB
3GB
1GB
1GB
1GB
2
1GB
2GB
1GB
1GB
1
Logical
capacity
Physical
capacity
Group#3
DIMM#A3,#B3
Group#2
DIMM#A2,#B2
Group#1
DIMM#A1,#B1
Config.
When you are using Standard 1GB memory or
Additional 2GB/4GB//8GB Memory Module Set [N8102-310/-311/-312]:
[Logical capacity]
= [Total of physical capacities] – [Physical capacity per memory group]] / 2
Your logical memory capacity is calculated using one of the following two formulas:
When you are using 1GB Memory Module Set [
When you are using 1GB Memory Module Set [
N8102
N8102
-
-
309]:
309]:
[Logical capacity]
[Logical capacity]
=
=
[Total of physical capacities
[Total of physical capacities
]
]
–
–
[Physical capacity per memory group]
[Physical capacity per memory group]
