Optimizing off-loaded input/output (i/o) requests

A computer program product comprising:

• one or more computer readable storage media and program instructions stored on the one or more computer readable storage media, the program instructions comprising:
• program instructions to determine whether a replication relationship is established between a first storage device and a second storage device for an asynchronous data replication process over a network, wherein the replication relationship establishes data parity between a first region of the first storage device and a first region of the second storage device, and data parity between a second region of the first storage device and a second region of the second storage device;
• program instructions to, responsive to determining that the replication relationship is established between the first storage device and the second storage device, determine whether data in the first region of the first storage device has changed;
• program instructions to, responsive to determining that the data in the first region of the first storage device has changed, determine whether the changed data in the first storage device is data copied from the second region of the first storage device;
• and
• program instructions to, responsive to determining that the changed data in the first region of the first storage device is data copied from the second region of the first storage device, replicate data from the second region of the second storage device to the first region of the second storage device.

A computer system comprising:

• one or more computer processors;
• one or more computer readable storage media;
• program instructions stored on the one or more non-transitory computer readable storage media for execution by at least one of the one or more processors, the program instructions comprising:
• program instructions to determine whether a replication relationship is established between a first storage device and a second storage device for an asynchronous data replication process over a network, wherein the replication relationship establishes data parity between a first region of the first storage device and a first region of the second storage device, and data parity between a second region of the first storage device and a second region of the second storage device;
• program instructions to, responsive to determining that the replication relationship is established between the first storage device and the second storage device, determine whether data in the first region of the first storage device has changed;
• program instructions to, responsive to determining that the data in the first region of the first storage device has changed, determine whether the changed data in the first storage device is data copied from the second region of the first storage device;
• and
• program instructions to, responsive to determining that the changed data in the first region of the first storage device is data copied from the second region of the first storage device, replicate data from the second region of the second storage device to the first region of the second storage device.