Hot-plugging nodes in a modular system having redundant power supplies

An information handling system, comprising:

• a plurality of power supplies;
• at least one operating hot-pluggable node;
• a plurality of power switches for coupling the plurality of power supplies to the at least one operating hot-pluggable node;
• and
• control logic for controlling the plurality of power switches and detecting removal of the at least one operating hot-pluggable node, wherein
• when a one of the at least one operating hot-pluggable node is to be removed,
• all processes running in the at least one operating hot-pluggable node to be removed are stopped,
• at least one of the plurality of power supplies is isolated from other ones of the plurality of power supplies, and
• the isolated at least one of the plurality of power supplies is coupled to the one of the at least one hot-pluggable node to be removed.

A method of adding a hot-pluggable node into an information handling system without disturbing existing operational nodes, said method comprising the steps of:

• providing a plurality of power supplies;
• adding a hot-pluggable node into an information handling system;
• detecting the added hot-pluggable node;
• isolating a one of the plurality of power supplies from other ones of the plurality of power supplies;
• coupling the added hot-pluggable node to the isolated one of the plurality of power supplies;
• determining when power to the added hot-pluggable node has stabilized;
• and
• coupling the added hot-pluggable node to the other ones of the plurality of power supplies after the power has stabilized.

A method of removing a hot-pluggable node in an information handling system without disturbing existing operational nodes, said method comprising the steps of:

• providing a plurality of power supplies;
• detecting when a one of at least one operating hot-pluggable node is to be removed;
• stopping all processes running in the detected one to be removed of the at least one operating hot-pluggable node;
• isolating a one of the plurality of power supplies from other ones of the plurality of power supplies;
• and
• coupling the detected one to be removed of the at least one operating hot-pluggable node to the isolated one of the plurality of power supplies.