19.1 Global Copy basic options19.1.1 Establishing a Global Copy pair19.1.2 Suspending a Global Copy pair19.1.3 Resuming a Global Copy pair19.1.4 Terminating a Global Copy pair19.1.5 Converting a Global Copy pair to Metro Mirror19.2 Creating a consistent point-in-time copy19.3 Cascading19.4 Hardware requirements19.4.1 License19.4.2 Interoperability19.4.3 Global Copy connectivity: Ports, paths, and links19.4.4 LSS and consistency group considerations19.5 Bandwidth considerations19.6 Distance considerations19.6.1 Channel extender19.6.2 Dense Wavelength Division Multiplexor (DWDM)19.7 Other planning considerations