This is where online data backup services come in. Even in the event of a major disaster, if your data is stored online or 'in the cloud' then it is safe.

这就是为什么在线数据备份服务存在的必要，即使在发生重大灾害时，如果你的数据存储在网络上或者在“云”端，那它就是安全的。

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This will result in enormous redo logs to be generated for online backup data files.

对于联机备份数据文件，这将导致生成大量的重做日志。

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Unlike offline backup, online backup only requires that data files and control files be backed up.

与脱机备份不一样，联机备份只要求备份数据文件和控制文件。

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Clickfree Online Backup ushers in a new age in data protection and file recovery by offering the easiest online backup ever.

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For example, Symantec has started to offer Norton Online Backup, a data recovery software.

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Another option takes us back to the Web -- you can often get an online backup plan that will remove your valuable data not only from that main hard drive, but also from your computer's immediate vicinity.

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