Abstract: Methods and apparatus for migrating data with minimal disruption in a storage virtualization system. In one embodiment, a method includes collecting information on a backend logical unit (LUN) having a direct path from a host, presenting the backend LUN to the host through a virtual target via the storage virtualization application, disconnecting the direct path from the host to the backend LUN so that the backend LUN is accessed by the host via the storage virtualization application transparently to the host, and migrating data from the backend LUN to a destination storage transparently to the host.

Abstract: Methods and apparatus for a storage virtualization system with distributed event processing. In an exemplary embodiment, a method comprises receiving an event by an intelligent switch in a storage virtualization system in which the intelligent switch is coupled to a control path cluster, identifying a type of the event to determine whether the event can be processed by the intelligent switch, processing the event by the intelligent switch where the event type is of a type that can be processed by the intelligent switch, wherein the intelligent switch continues to run in the absence of the control path cluster without direct communication between data path controllers, and processing the event at a control path cluster if the event type cannot be processed by the intelligent switch.