To provide an integrated storage system or the like capable of smoothly executing resetting of address information following adding of a network node, or replacement at failure.

In the integrated storage systems 1-4, a host adapter HAD is equipped between a switch device SW and each of computers C0 and C1 to provide smooth resetting of the address information following adding of a network node, or replacement at failure. In other words, address translation information is written before adding, and after adding, the address translation information written at initial starting is written into each storage device. At starting, address change information related to oneself is collected from each storage device, and one's address translation information is updated. When adding of a storage device SD is detected, address translation information of the added storage device is obtained in response.