快照会保留与原始文件系统相同的权限。
The snapshot retains the same permissions as the original file system.
在执行回滚之前，必须卸载原始文件系统。
The original file system must be unmounted before executing the roll back.
快照会在修改原始文件系统期间保持稳定。
The snapshot remains stable while the original file system is still being modified.
如果原始文件系统是好的，就跳过这个步骤。
如果原始文件系统中的一个数据块发生更改，就会使用此空间。
This space is used if a block in the original file system changes.
Coda文件系统是改进原始的AFS系统的第一次尝试。
The Coda file system was the first attempt at improving the original AFS.
Coda文件系统是改进原始的AFS系统的第一次尝试。
The Coda file system was the first attempt at improving the original AFS.
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