Storage apparatus and method of controlling the same

Appropriate parameters can be efficiently set for network ports included in a storage apparatus. A storage apparatus performing I/O processing on a storage drive in response to an I/O request manages a first table in which a network device (SAS controller, SAS expander) is associated with location information of the network ports, a second table in which the cable length of a network cable coupled to each of the network ports is associated with a port ID of the network port, and a relationship between the cable length of the network cable and the parameter (output amplitude, pre-emphasis) set for the network port. The storage apparatus acquires the cable length of the network cable from the second table, determines the parameters corresponding to the acquired cable length from the above relationship, and sets the determined parameter for the network port.