Abstract: Procedures and systems for avoiding undesired trespass may be deployed in host processors that use storage arrays with automated fail-back and fail-over functions. In one embodiment, a method may synchronize path records in a storage array with path records in a host processor. The method may detect a failure of a first data path through a first controller on the storage array to a logical unit (LUN) on the storage array. In response to the failure, the host processor may initiate a failover on the storage array of the LUN, so that the LUN is accessed through a backup controller on the storage array. The host processor may also issue commands to pin the failed-over LUN to the backup controller. For example, the host processor may issue commands to set the default owner of the LUN to be the backup controller.

Abstract: A method for controlling data traffic within a storage area network can be provided. The method can comprise analyzing data for a path in a storage area network to determine whether the path should be identified as a less preferred path, and controlling data traffic routing to avoid use of a path identified as a less preferred path. In some embodiments, the data can be obtained from a host bus adaptor in the path. In some embodiments, the controlling can comprise throttling traffic over a path identified as a less preferred path.

Abstract: Procedures and systems for avoiding undesired trespass may be deployed in host processors that use storage arrays with automated fail-back and fail-over functions. In one embodiment, a method may synchronize path records in a storage array with path records in a host processor. The method may detect a failure of a first data path through a first controller on the storage array to a logical unit (LUN) on the storage array. In response to the failure, the host processor may initiate a failover on the storage array of the LUN, so that the LUN is accessed through a backup controller on the storage array. The host processor may also issue commands to pin the failed-over LUN to the backup controller. For example, the host processor may issue commands to set the default owner of the LUN to be the backup controller.