BainwoodHuang
Data storage system providing asymmetric multipath storage access
A data storage system provides asymmetric multi-path access to a storage device from a host computer using a storage protocol such as SCSI. Device state information is maintained indicating that one path of set of paths between the host computer and the storage device is a non-fully-functional path. In response to receiving device discovery commands from the host computer on the one path and the one path being indicated to be a non-fully-functional path, the data storage system returns respective good responses indicating that the storage device is accessible to the host computer via the non-fully-functional path. However, in response to receiving a test unit readiness command from the host computer on the one path and the one path being indicated to be a non-fully-functional path, an error response is returned which causes the host computer to select an alternative path of the set of paths for the data transfer.
EMC IP Holding Company LLC
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H04L H04L
inventional inventional
William Subin Benjamin Kevin Arieh Weiqun Deepak
Hatstat George Yoder Loehfelm Don Li Vokaliga