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。
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.
在一个逻辑节点里，每个表空间的定义都跨越了两个阵列，使用了每个阵列中的13个驱动器，总共使用了26个硬盘驱动器。
Within a Logical Node, each tablespace is defined across two arrays, using 13 drives from each array, for a total of 26 hard drives.
事实上，在一个Symmetrix存储阵列中，一个EFD能够以大约1毫秒的响应时间实现与30个15,000r PM硬盘驱动器相同的IOPS。
In fact, in a Symmetrix storage array, one EFD can deliver IOPS equivalent to thirty 15,000 RPM hard disk drives with a response time of approximately 1 millisecond.
事实上，在一个Symmetrix存储阵列中，一个EFD能够以大约1毫秒的响应时间实现与30个15,000r PM硬盘驱动器相同的IOPS。
In fact, in a Symmetrix storage array, one EFD can deliver IOPS equivalent to thirty 15,000 RPM hard disk drives with a response time of approximately 1 millisecond.
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