Online storage migration of replicated storage arrays

摘要

Various systems and methods for migrating replicated storage arrays. For example, one method can involve transferring a set of data from a first storage device to a second storage device. The method also involves terminating a replication relationship between the first storage device and establishing a new replication relationship between the second storage device and either the third storage device or a fourth storage device. Between the time that the replication relationship with the first storage device is terminated and the new replication relationship with the second storage device is established, the second storage device receives a plurality of change operations. The method involves applying the change operations to either the third storage device or fourth storage device.