All cached storage subsystems provide support for concurrent copy.
Concurrent copy operates with both 3380 and 3390 devices, but does not operate with 3390 devices in 3380 track compatibility mode.
To use concurrent copy with a particular cached storage subsystem, the subsystem cache must be active. The statuses of cache, nonvolatile storage (NVS), DASD fast write, and dual copy have no effect on your use of concurrent copy. Their statuses, however, can affect the overall performance of volumes with active concurrent copy sessions.