Acer Altos R710 - Manual (Page 87)

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from the Primary mirror, the chipset will automatically replace the data
in the defective slot with data from the Secondary mirror.
Below table list the suggested memory population for memory
mirroring:
Power Supply
The Acer Altos R710 server used 700 watt 1 + 0 / 1+1 hot-swappable
redundant power supply. Default one power module installed.