Patent ID: 7577775

Claim:
A storage system comprising: a management terminal for managing the configuration information of the storage system; and wherein the control logical circuit manages, based on the combination of signal potentials of the connection confirmation signals output from the connect signal lines respectively connected to the controller boards, a plurality of models related to the connections between the controller boards and the FC switching boards, wherein the plurality of models are a standard model where one controller board is connected to one FC switching board and a high performance model where a plurality of controller boards are connected to one FC switching board, and wherein the configuration change from the standard model to the high performance model is performed such that: the management terminal changes the controller board assigned to control a first disk drive connected to a first FC switch of the plurality of FC switches to a first controller board connected to the currently relevant FC switching board and changes the controller board assigned to control a second disk drive connected to a second FC switch of the plurality of FC switches from the first controller board to a currently non-connected second controller board, the second controller board is connected to the FC switching board while the plurality of disk drives are in operation, a first control circuit connected to the first controller board configures settings for the first FC switch to set the access target of the first controller board to the first disk drive, and a second control circuit connected to the second controller board configures settings for the second FC switch to set the access target of the second controller board to the second disk drive.