Storage subsystem and power supply system

A storage subsystem connected to a host computer via a communication network, comprising:

• a plurality of storage apparatuses for storing data from said host computer;
• a plurality of DC power supplies arranged in correspondence to each of said storage apparatuses, and for supplying DC power to each of said storage apparatuses via a main power supply wiring;
• a redundant DC power supply for generating, with any one of the storage apparatuses among said plurality of storage apparatus as a load, DC power to said load;
• and
• an auxiliary power supply wiring for guiding the output of said redundant DC power supply to each of said storage apparatuses;
• wherein said auxiliary power supply wiring is configured by partially including a wiring that is common to the respective power supplies,
• wherein said auxiliary power supply wiring includes:
• a common power supply wiring that is common to each of said DC power supplies;
• a plurality of branch power supply wirings branching from said common power supply wiring and connected to another storage apparatus that is different from the load of a respective DC power supply via each of said DC power supplies;
• and
• a redundant power supply wiring for connecting said redundant DC power supply and said common power supply wiring.