Acer AT150 F1 - Manual (Page 68)

3 System upgrades 56
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
Notes: 1. Place DIMMs in “X” location.
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 DIMMs (support depends
on availability).
5. Do not mix UDIMMs with RDIMMs.
Channel 1
DIMM slots
Channel 2
DIMM slots
Channel 3
DIMM slots
Notes
Configuration 1B 1A 2B 2A 3B 3A
A X X X
B X X X X X X