为键控物理或逻辑文件创建索引。

An index is created for a keyed physical or logical file.

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了解逻辑文件系统和虚拟文件系统。

Understanding the logical file system and the virtual file system.

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然而，可以对这些逻辑文件进行备份以用于日后恢复。

However, you can backup these logical log files for restore purposes.

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然而，可以对这些逻辑文件进行备份以用于日后恢复。

However, you can backup these logical log files for restore purposes.

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