Patent ID: 8301812

Claim:
A method of verifying host path detection comprising: receiving first information from a first data storage system, said first information indicating a first set of one or more hosts and, for each host in the first set, which one or more devices of a first device set of the first data storage system are accessible to said each host in the first set over one or more associated paths to the first data storage system; receiving second information at a second data storage system, wherein the second data storage system also receives the first information from the first data storage system, said second information indicating a second set of one or more hosts and, for each host in the second set, which one or more devices of a second device set of the second data storage system are accessible to said each host in the second set over one or more associated paths to the second data storage system, wherein each of said devices in the first device set has an associated device in said second device set; and performing first processing at the second data storage system to determine whether each host included in the first set and also included in the second set has successfully completed path detection with respect to said second device set for the second data storage system, said first processing using information including the first information, the second information, first mapping information and second mapping information, the first mapping information indicating, for each device in the second device set, through which one or more ports of the second data storage system said each device in the second device set is accessible, and the second mapping information indicating, for each device in the first device set, an associated device in said second device set, and wherein prior to performing said first processing, each of one or more paths of a second path set for the second device set is in a passive state, said second path set identifying paths between hosts included in the first set and also included in the second set and target ports of the second data storage system, wherein each path in the second path set provides access to one of the devices in the second device set and is in said passive state thereby indicating that said each path of the second path set is not available for sending I/O operations to said one device and is available for sending host control operations to said one device.