Patent ID: 6910075

Claim:
A method for dynamically modifying a communication path between a first group of devices in a first data storage system and a second group of devices in a second data storage system comprising: issuing a command request to said first data storage system to dynamically modify said communication path; pushing setup data from said first data storage system to said second data storage system using a first communication link that is not used to transmit user data; obtaining a second communication link, different from said first communication link, between said first group of devices and said second group of devices; preparing a first part of a connection to said first group of devices; after successfully preparing said first part, preparing a second part of said connection to said second group of devices; and after successfully preparing said first and second parts of said connection, indicating that said communication path is ready to transmit user data via said second communication link, wherein, in response to a user writing user data to the first group of devices, the user data is automatically copied from the first group of devices to the second group of devices.