Sparing Mode - Acer AT350 F1 Series User Manual

Sparing mode

• In this mode, if the system detects degrading memory and did not
crash, the data in the failed channel will be copied to the spare
channel. The failed channel is then isolated and the spare channel
becomes active. However, any uncorrectable error that happens
before the isolation will still cause the system to stop normal
operation.
• Channel 3 is the spare channel. Therefore, the effective size will be
reduced by one-third.
• Follow the population rules described in the independent mode.
• Sparing mode requires that all three channels use identical DIMMs.
1A, 2A and 3A should be the same type, size and manufacturer,
likewise for 1B, 2B and 3B. The same rule applies to processor 2.
• Intel® Xeon® Processor 5500 Series CPUs do NOT support the
memory sparing mode.
Memory population for sparing mode
Single processor configuration
Channel 1
DIMM slots
Configuration 1C
A
B
C X
Notes: 1. Place DIMMs in "X" location.
Channel 2
DIMM slots
1B 1A 2C 2B
X
X X X
X X X X
2. DIMM population must correspond to the above tables.
3. DIMM modules support 1 GB, 2 GB and 4 GB DIMMs.
4. DIMM modules support 8 GB and 16 GB DIMMs (support
depends on availability).
5. Do not mix UDIMMs with RDIMMs.
6. 3-DIMM per channel configuration is only available for
single/dual rank RDIMM.
Channel 3
DIMM slots
2A 3C 3B 3A
X X
X X X
X X X X
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Notes
SR, DR RDIMMs only