关于存储容量方面RAID - 5和RAID - 6更节省，但是它们通常需要额外硬件处理来避免奇偶校验计算加重处理器负荷。
RAID-5 and RAID-6 are more frugal with respect to storage capacity, but they typically require additional hardware processing to avoid burdening the processor with the parity calculations.
尽管RAID - 5支持一个驱动器故障，而RAID - 6可以支持两个驱动器故障(尽管奇偶校验信息消耗更多的容量)。
Although RAID-5 can support failure of a single drive, RAID-6 can support two drive failures (though more capacity is consumed through parity information).
RAID - Z 2安装的最低要求是应该配置5个驱动器(两个用于奇偶校验)，剩下三个驱动器全部用于存储。
At a minimum, a RAID-Z2 setup should be configured with five drives total (two used for parity) which will leave three drives to be counted as overall storage.
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