A remote copy system includes a first storage system including a first
storage controller and a first data volume. The first storage controller
is configured to control data access requests to the first data volume.
The first storage system is configured to store write data in the first
data volume upon receiving a write request from a first host associated
with the first storage system and generate a journal including control
data and journal data. A second storage system includes a journal volume
and configured to receive and store the journal generated by the first
storage system in the journal volume. A third storage system includes a
second data volume and configured to receive the journal from the second
storage system and store the journal data of the journal to the second
storage system according to information provided in the control data.