But for this data to be useful after a disk or server crash, it must be stored on another server.

但对于在磁盘或服务器崩溃后有用的数据，必须存储在另外一台服务器上。

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This feature eliminates the need to switch access to the disk from one server to the other.

该功能免除了将磁盘访问从一台服务器切换至另一台的需要。

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Technical events: "Hard disk failure", "Server started" or "Database 80% full" are examples of events that relate to the technical activity and configuration of the system.

技术事件：“硬盘故障”、“服务器启动”或者“数据库空间80%已满”这些都是与系统技术活动以及配置相关的事件的例子。

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Retrieving and storing data from a hard-disk drive takes one million times longer than accessing it from server memory, a difference that can severely degrade application performance.

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This coupled with the fact that big businesses have to cope with increasing computing workloads in server virtualization environments and cloud computing, that soon disk storage will look outdated.

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