Storage system and backend construction method for storage system

A backend construction method for a storage system,

• the storage system comprising:
• a switch that relays communication according to a communication interface in which the number of master devices that can be present in the same partition is defined;
• a plurality of storage devices coupled to the switch;
• a memory unit including one or more memories;
• and
• a processor unit which is one or more processors coupled to the memory unit and the switch and has a plurality of master devices, wherein
• the construction method comprising:
• logically partitioning the switch into a plurality of partitions including a plurality of first partitions and one or more second partitions;
• coupling the plurality of master devices of the processor unit to the plurality of first partitions via a plurality of paths without coupling the plurality of storage devices to the plurality of first partitions,
• coupling the plurality of storage devices to the one or more second partitions without coupling the processor unit to the one or more second partitions,
• allowing the switch to have an address conversion function which is a function of enabling transfer between different partitions,
• providing a virtual master device in each of the one or more second partitions, and
• allowing the virtual master device in each of the one or more second partitions to execute initial setting with respect to each of all storage devices coupled to the second partition.