Cisco UCS C200 M2 - Page 13

Cisco UCS C200 M2 High-Density SFF Drive Rack-Mount Server
CONFIGURING the SERVER
13
Select DIMMs and Memory Mirroring
Select the memory configuration and whether or not you want the memory mirroring option.
The available memory DIMMs and mirroring option are listed in
Table 4.
Approved Configurations
(1) 1-CPU configuration without memory mirroring:
■ Select from one to six DIMMs (note that there are six DIMM slots per CPU)
(2) 1-CPU configuration with memory mirroring:
■ Select either two or four DIMMs. The DIMMs will be placed by the factory as shown in the
following table:
NOTE: When memory mirroring is enabled, the memory subsystem simultaneously
writes identical data to two channels. If a memory read from one of the channels
returns incorrect data due to an uncorrectable memory error, the system
automatically retrieves the data from the other channel. A transient or soft error in
one channel does not affect the mirrored data, and operation continues unless there
is a simultaneous error in exactly the same location on a DIMM and its mirrored
DIMM. Memory mirroring reduces the amount of memory available to the operating
system by 50% because only one of the two populated channels provides data.
Table 4 Available DDR3 DIMMs
Product ID (PID) PID Description Voltage
Ranks/
DIMM
DIMM Options
UCS-MR-1X041RX-A 4GB DDR3-1333-MHz RDIMM/PC3-10600/single rank/1.35v 1.35 1
UCS-MR-1X082RX-A 8GB DDR3-1333-MHz RDIMM/PC3-10600/dual rank/1.35v 1.35 2
UCS-MR-1X162RY-A 16GB DDR3-1600-MHz RDIMM/PC3-12800/dual rank/1.35v 1.35 2
Memory Mirroring Option
N01-MMIRROR Memory mirroring option
Number of
DIMMs
DIMM Placement in Channels
(Channel C is not used with memory mirroring)
2 1 DIMM in Channel A, 1 DIMM in Channel B
4 2 DIMMs in Channel A, 2 DIMMs in Channel B