Hitachi TrueCopy for z/OS (T1711-96009, June 2006)

TrueCopy for z/OS user guide 53
N-to-1 or 1-to-n remote copy connections (n≤4) can also be configured by using the dynamic switching
capability of the ESCDs to share the physical interface cables between the components.
Figure 12 N-to-1 and 1-to-n remote copy connections (n≤4)
NOTE: 1-to-n configurations (one main disk array and multiple remote disk arrays) are valid for TC390A,
as long as a consistency group does not span remote disk arrays.
In addition, the ESCDs can accommodate channel-to-MCU and channel-to-RCU connections in addition to
the remote copy connections.
Figure 13 Remote copy connections shared with channel-to-RCU connections