Patent ID: 7308604
Filing Date: 2007-12-11
Classification: G06F

Abstract:
1. A method for achieving fail-over recovery in a media area network having a storage system with at least one storage device for storing digitized information, a host system for providing overall control of the media area network; and a host bus adapter for providing a link between the host system and the storage system, the method comprising the steps of monitoring, at a lower-level port driver in the host bus adapter, communication status between the storage system and the host bus adapter, and in the event of a failure; checking whether cancellation of the outstanding commands occurred, and if not then initiating fail-over recovery of any failed storage system controller; initiating switching at the lower-level port driver to activate an alternative port, thereby achieving fail-over recovery, including the steps of: queuing requests from an original port that failed for retry on the alternative port; canceling all outstanding requests on the original port; and issuing commands via the alternative port, including commands associated with the requests previously queued for retry.