Patent ID: 8635391

Claim:
A system, comprising: a host including a plurality of physical ports; a source storage system; a target storage system; a first switch; and a host management server controlling I/O between the target storage system and the source storage system; wherein the host accesses the source storage system via a source logical path through the first switch; wherein in response to a migration request to migrate data from the source storage system to the target storage system: (a) a first logical path is added between the host and the target storage system via the first switch, (b) a second logical path is added between the host and the target storage system via the first switch, and (c) the first logical path is terminated after completion of the (b); wherein the source logical path between the host and the source storage system is terminated after completion of establishing connections for the first logical path and the second logical path; and wherein a second virtual port is created in the target storage system for the second logical path using a port name previously used for a first virtual port in the source storage system for the source logical path; wherein a logical volume is shared between the first virtual port and a port of the target storage system receiving access from the host via the first switch; wherein a notification is sent when the first logical path and the second logical path are added; and wherein the notification is sent to the host management server and the migration of data from the source storage system to the target storage system is performed after the notification is received by the host management server.