损耗：这项告诉我们在不破坏阵列的功能和数据丢失的前提下，我们阵列中的设备会损失多少。

Attrition: this tells us how many devices in the array can be lost without breaking the functionality of the array and losing data.

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使用RAID阵列代替单独磁盘时，考虑到部分磁盘用于提供故障转移功能，最优的磁盘数量更高。

When using RAID arrays instead of individual disks, the optimum number of disks is higher, taking into consideration that some of the disks are used to provide failover capabilities.

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该方案没有出现在已安装的程序或正在运行的程序和一个有用的阵列或功能允许。

The program does not show up under installed programs or running programs and allows for a useful array or features.

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