Patent ID: 9639290
Date: 2017-05-02
CPC Classifications: G06F

Claim:
1. A method, comprising: receiving, by a secondary storage controller, an identifier that uniquely identifies a source volume controlled by a primary storage controller; copying data stored in the source volume controlled by the primary storage controller to a target volume controlled by the secondary storage controller; receiving, at the secondary storage controller, a command from a primary host to write data associated with the command, to the source volume, wherein the primary host is coupled to the primary storage controller and the secondary storage controller; and in response to receiving the command at the secondary storage controller from the primary host to write the data associated with the command to the source volume controlled by the primary storage controller, using the identifier that uniquely identifies the source volume controlled by the primary storage controller and was previously received by the secondary storage controller, to write the data associated with the command to the target volume controlled by the secondary storage controller.