hot swapping

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hot swapping
1. The process of changing power modules while a system is operating. It is important in large computer installations involving servers that must run continuously. In such systems there may be multiple power supply modules, designed to provide redundancy and so enhance the system reliability.

2. A facility that enables interface connections to be inserted and removed while the system is powered up. For example, extra removable storage may be attached through a USB port, without having to reboot the system.

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