Upon detection of a fault of a loop or any of disk apparatuses 30, 40, and 50, an FC-AL control unit 15 notifies an MPU11 of contents of the fault. The MPU11 records a fault history for each disk apparatus in a memory circuit 12 and also sets an order in which the disk apparatuses 30, 40, and 50 are...http://www.google.de/patents/US20020191537?utm_source=gb-gplus-sharePatent US20020191537 - Method and apparatus for diagnosing FC-AL system link
