The sarcomere struture of HMP also remained basic structure except the weakening at Z disk.
肉样经HMP处理后，肌节基本上保持原有结构，只是Z盘处稍有弱化发生。
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。
RAID-Z traverses the available metadata to read only the data that's relevant for the geometry and avoids reading the unused space on the disk.
RAID - Z遍历可用的元数据以便只读取有关几何学的数据并避免读取磁盘上未使用的空间。
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