Few situations are as distressing as having a physical server crash and discovering that your backup is useless and then that your machine must be rebuilt using bare metal procedures.
最让人痛苦的极端情况是物理服务器崩溃并发现备份不能用，然后不得不从裸机开始重新构建环境。
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The loss of a laptop or crash of a hard drive does not jeopardise the data because it is regularly saved in "the cloud" and can be accessed via the web from any machine.