Patent ID: 8732354

Claim:
A method comprising: sending an input/output request from a volume manager layer to an operating system small computer system interface (SCSI) driver layer, wherein the input/output request is initiated by a host computer, and the host computer is coupled to a storage area network; sending the input/output request from the operating system SCSI driver layer to a dynamic multipath management layer; determining whether to grant the input/output request by comparing information of the input/output request with information in an access control list, wherein the determining is performed at the dynamic multipath management layer, the determining is configured to prevent unauthorized access to the storage area network, any access not specifically allowed by the access control list is unauthorized, and the access control list indicates whether the host computer is allowed access to a volume of the storage area network needed to process the input/output request; and in response to determining that the input/output request is granted, sending the input/output request from the dynamic multipath management layer to an operating system host bus adapter driver layer.