volume and failure management method on a network having a storage device

In a system comprising a computer, a virtualization switch coupled to the computer, a plurality of storage systems coupled to the virtualization switch, and a management computer coupled to the plurality of storage systems and the virtualization switch, the management computer comprising:

• an interface coupled to the plurality of storage systems and the virtualization switch;
• and
• a processor coupled to the interface,
• wherein the processor receives volume information from the plurality of storage systems and virtual volume information from the virtualization switch via the interface,
• wherein the volume information includes a first configuration information of a plurality of volumes constructed in the plurality of storage systems, and the virtual volume information includes a second configuration information of a plurality of virtual volumes constructed by one or more of the plurality of volumes in the virtualization switch,
• wherein the processor receives a first error notification from the virtualization switch and a second error notification from one of the plurality of storage systems via the interface,
• wherein the processor determines whether or not a failure notified by the second error notification causes an issuance of the first error notification based on a relationship between the volume information and the virtual volume information, and outputs information indicating that the failure notified by the second error notification is a causal error of the first error notification if the failure notified by the second error notification causes the issuance of the first error notification.