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Memory mirroring enhances system reliability by keeping two
identical data images in memory.
This option is only available if you choose the mirroring option
for Memory RAS Config. It can be one of the following:
• inter-socket—Memory is mirroredbetween twoIntegrated
Memory Controllers (IMCs) across CPU sockets.
• intra-socket—One IMC is mirrored with another IMC in
the same socket.
• Platform Default—The BIOS uses the value for this
attribute contained in the BIOS defaults for the server type
and vendor.
Mirroring Mode
Sparing optimizes reliability by holding memory in reserve so
that it can be used in case other DIMMs fail. This option
provides some memory redundancy, but does not provide as
much redundancy as mirroring. The available sparing modes
depend on the current memory population.
This option is only available if you choose sparing option for
Memory RAS Config. It can be one of the following:
• dimm-sparing—One DIMMis heldin reserve.If a DIMM
fails, the contents of a failing DIMM are transferred to the
spare DIMM.
• rank-sparing—A spare rank of DIMMs is held in reserve.
If a rank of DIMMs fails, the contents of the failing rank
are transferred to the spare rank.
• Platform Default—The BIOS uses the value for this
attribute contained in the BIOS defaults for the server type
and vendor.
Sparing Mode
Whether the system prioritizes low voltage or high frequency
memory operations. This can be one of the following:
• power-saving-mode—The system prioritizes low voltage
memory operations over high frequency memory
operations. This mode may lower memory frequency in
order to keep the voltage low.
• performance-mode—The system prioritizes high
frequency operations over low voltage operations.
• Platform Default—The BIOS uses the value for this
attribute contained in the BIOS defaults for the server type
and vendor.
LV DDR Mode
Cisco UCS Manager GUI Configuration Guide, Release 2.0
OL-25712-04 393
Configuring BIOS Settings