When the GAD status is Mirrored, the I/O mode of the P-VOL and S-VOL is Mirror (RL).
As shown in the following figure, a write request sent to a GAD volume is written to both pair volumes, and then a write-completed response is returned to the host.
Read requests are read from the volume connected to the server and then sent to the server. There is no communication between the primary and secondary storage systems.
