RAID-Z is not the only type of disk array available to ZFS. Mirrors are usually faster and less memory-consuming, but require equal Numbers of hard drives to use it.
RAID - Z不是唯一可用于ZFS的磁盘阵列类型，镜像速度通常更快且消耗的内存更少，但需要等量的硬盘驱动器才能使用它。
Performance testing tools let you experiment with different system configurations, such as RAID array stripe size and hard disk file format, to see which combinations result in better performance.
性能测试工具允许您体验不同的系统配置，比如 RAID 阵列条带深度和硬盘文件格式，以便了解哪些结果能实现更好的性能。
First you specify the actual block device with a "device" line, and then you immediately follow it with a "raid-disk" entry that specifies its position in the array, starting with zero.
首先您用一个“ device ”行指定实际的块设备，接下来用一个“ raid - disk ”条目指定其在阵列中的位置，从零开始。
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