Of course it does not help to mirror your data by adding more disks to your own computer because a fire, flood, power surge, etc. could still wipe out your local data center.

 
  • 当然通过在你的机子上增加更多的磁盘来镜像你的数据也是无助的,因为一次火,洪水,电力波动等因素将仍然破坏你局部的数据中心。
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