A virtualization system is introduced between a host and a storage system.
An apparatus, system, and method of migrating replication includes
stopping or making dormant applications on a host, or checking whether
the applications are stopped or dormant. The statuses of a primary volume
and a secondary volume that is a replica of the primary volume are
checked to determine whether they have become identical. A primary
virtual volume is defined to map to the primary volume and a secondary
virtual volume is defined to map to the secondary volume. Replication is
defined from the primary virtual volume to the secondary virtual volume.
Replication is started with a NOCOPY option, and the applications may be
restarted or a message is sent indicating that the applications can be
restarted. There is no actual migration of application data, and as
result, the time required for migrating replication can be eliminated.