在概念验证中，需要把虚拟服务器的一个完整映像从主数据中心复制或迁移到灾难恢复数据中心。

In this proof of concept, you need to copy or migrate a complete image of a virtual server from the primary data center to the disaster recovery data center.

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计算机灾难发生后恢复数据是减少损失的一个好方法。

Backing up data is a great way to minimize losses after a computing catastrophe.

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物理完整性是指保证数据库的数据不受物理故障的影响，并有可能在灾难性毁坏时重建和恢复数据库。

Refers to the physical integrity of the data from the database to ensure the physical failures, and there may be catastrophic damage to rebuild and restore the database.

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