手头一台P6 570带一个扩展柜，巡检时发现扩展柜有一个电源故障；
目前准备停机进行更换电源模块，在更换时需要把主机所有电源线都拔掉吗？还是只需要拔掉故障电源的线，直接进行更换？
求各位大手给点建议。
PS：在官网查询是提示需要拔掉所有电源线的，也查询到P6 570电源是支持热插拔的；比较纠结。
原文如下：
Disconnect the power cable from the back of the power supply that you want to remove.
Note: This system might be equipped with a second power supply. Before continuing with this procedure, ensure that all power sources to the system have been completely disconnected.
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