Datasheet

Cisco UCS B250 M2 Blade Server
CONFIGURING the SERVER
11
Choose DIMMs and Memory Mirroring
Choose 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. DIMMs are available as
two-DIMM kits. Each of the product IDs in Ta ble 4 specifies two DIMMs.
NOTE: When memory mirroring is enabled, the memory subsystem simultaneously
writes identical data to two channels. If a memory read operation 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 percent because only one of the two populated channels provides data.
Table 4 Available DDR3 DIMMs
Product ID (PID) PID Description Voltage
Ranks/
DIMM
DIMM Pair Kit Options (2 DIMMs per kit)
UCS-MR-2X041RX-B 2X4GB DDR3-1333-MHz RDIMM/PC3-10600/1R/x4/Low-Volt 1.35/1.5 V 1
UCS-MR-2X082RX-B 2X8GB DDR3-1333-MHz RDIMM/PC3-10600/2R/x4/Low-Volt 1.35/1.5 V 2
Memory Mirroring Option
N01-MMIRROR Memory mirroring option