POWER FAILURE MANAGEMENT IN COMPONENTS OF STORAGE AREA NETWORK

摘要

A storage area network (SAN) is provided with redundancy and recovery mechanism. A primary storage switch performs dynamic address translation between logical storage addresses received from host devices and physical addresses of SAN storage arrays. When power failure in the primary storage switch is detected, metadata associated with the dynamic address translation operation is sent to a secondary storage switch via a network connection to provide the dynamic address translation in lieu of the primary storage switch. A storage array experiencing power failure similarly sends cached data to another storage array via a network connection so that the other storage array can substitute the failed storage array. During the power failure, a data backup module in the primary storage switch or the storage array is powered by a temporary power source.