Someone in our company bought 4 Dell r7525 with 40Tb of disks and built a DFS replication ring. It failed horribly :D Two of the servers where corrupt( due to remote sync limitations) and needed a complete reconfiguration. I pulled those two back to HQ and since we have a bunch of small NFS and SMB servers , I am going to consolidate. I'm not sure if "scale" means that there is some sort of inherent ability to create an HA pair out of these two but I am certain that an rsync job between them would at minimum protect the data well enough as to not need to backup to another disk farm.