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The installation guidelines for memory modules are as follows:
•
Memory modules must be identical in size, speed, and technology.
•
Memory modules installed in memory module sockets with white release levers must be identical and the same rule applies for sockets
with black and green release tabs. This ensures that identical memory modules are installed in matched pairs—for example, A1 with A2,
A3 with A4, A5 with A6, and so on.
•
Memory modules installed in memory module sockets with white release levers must be identical and the same rule applies for sockets
with black and green release tabs. This ensures that identical memory modules are installed in matched pairs—for example, A1 with A3,
A2 with A4, A5 with A7, and so on.
Table 35. Processor configuration
Processor
Configuration
Single CPU
Memory population order
Fault Resilient Memory
Fault Resilient Memory (FRM) mode operates with the parts of redundant system memory, leaving the rest of the system memory in non-
mirror mode. It reduces the cost of memory mirroring by mirroring just the critical portion of memory versus mirroring the entire memory
space. It provides additional flexibility to optimize cost, performance, or RAS by providing high degree of reliability to memory at lower cost
than mirroring the entire system memory.
Memory Mirroring is a RAS feature that enables duplicating memory content at a remote DIMM in the partition. This capability enables high
data availability from memory subsystem. Fault Resilient Memory enables you to select the segments of system memory that contains the
most critical code.
Sample memory configurations
The following table shows sample memory configurations for a single processor that follow the appropriate memory guidelines stated in this
section.
NOTE:
DIMMs populated must be identical for each riser. In the mirroring mode, only one of the two CPUs is populated.
Table 36. Memory configurations—single riser
Memory Mode
System Capacity
(in GB)
64
96
128
192
64
Advanced ECC
Lockstep
96
128
128
192
256
384
Memory population rules
{1,2}, {3,4}
DIMM Size
Number of
(in GB)
DIMMs
8
8
8
12
8
16
8
24
16
4
16
6
16
8
32
4
32
6
32
8
32
12
Memory population information
See Memory mirroring note
DIMM Slot Population for CPU 1 (Riser A)
2
6
10
4
8
12
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Installing and removing system components
1
5
9
3
7
11
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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Troubleshooting
