In the following examples, I demonstrate how I used JFS2 snapshots to backup and recover a file system during an upgrade activity.
在下面的例子中，我将演示如何使用JFS2快照来在升级过程中备份和恢复文件系统。
Operating system examples include file access and network access.
操作系统的示例包括文件访问权和网络访问权。
Other examples of metadata include attributes, such as hidden or read-only, that the operating system USES to decide how to display the file and who gets to modify it.
metadata的其他例子包括属性，像是藏着或者唯读，作业系统使用决定，该如何显示文件而且谁开始修正它。
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