Hi, Which one do you prefer: 1- having a copy of data off-site by disk subsystem copy services: 2- implementing D/R with VTL-to-VTL communication
Number 1: -needs more disk capacity -copy services license price -more bandwidth is needed between sites even in asynchronous mode -more difficult LAN-free scenario if there are not many physical tape drives. So, something like SANergy is needed Number 2: - VTL price in both sites - less bandwith is needed (it is backup data, not the changing data itself. Furthermore, it is de-duped) - virtual tape drives make LAN-free easier to implement and operate ... Appreciate any comments, Mehdi
