PPRC lets you allocate recovery system volumes on any number of recovery storage subsystems. The storage controls at the recovery site do not have to have a one-to-one correlation with their primary storage subsystem counterparts. Project the performance impact on recovery storage subsystems to be sure that it is within acceptable limits.
Higher recovery storage subsystem activity increases the write time between storage controls, thereby affecting primary disk I/O performance. Include all other recovery storage subsystem activity in your assessment, such as access by other applications and systems to non-PPRC volumes on the same storage subsystem.