它不能阻止由于硬件或磁盘驱动器故障、数据损坏或其它潜在物理灾难引起的数据丢失。

Nor does it protect you from situations where data has been lost due to a hardware or disk drive failure, data corruption, or other potential physical disasters.

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与 HA 相关的一个术语是灾难恢复（Disaster Recovery，DR），DR 与 HA 的不同之处在于，它侧重于保护数据，防止因灾难性故障导致数据丢失。

Related to HA is Disaster Recovery (DR), DR is different from HA in that it focuses on protecting data against data loss caused by a catastrophic failure.

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磁头划伤对于硬盘来讲是灾难，它意味着磁盘上的数据部分或全部丢失。

A head crash is a disaster for a hard disk. It means that some or all of the data on the disk is destroyed.

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