The relationship of sensitivity for the system failure probability was firstly constructed between multiple failure modes and single failure mode.
此模型首先给出了多个失效模式系统失效概率敏度与单夹杂裂纹扩展寿命失效概率敏度之间的关系；
No single point of failure: you can pop out a drive and the array will continue to function (albeit with a performance hit, known as "degraded mode"). Replace the drive and it will rebuild itself.
没有单点故障：你可以将其中的某块盘拔出而不影响磁盘阵列继续正常服务(虽然性能会有所下降，即所谓“降级模式”)，当你替换某块盘后RAID也会进行重建。
One bracket in a particularly critical place, a single point failure mode, that bracket was under-designed.
有一个在关键地方的托座，出了一个小问题，设计上不完善。
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