Besides the fact that your BW is off a factor of 2.81, which would bring it to ~18.65h, note that: * That's why they are often rather on the receiving end of b

Besides the fact that your BW is off a factor of 2.81, which would bring it to ~18.65h, note that: * That's why they are often rather on the receiving end of backups ;-) * Are often in RAID10 systems, for redundancy/uptime + performance, roughly doubling their bandwidth * Delta syncs/backups exists and thus normally only something like tens to hundreds of GiB need to be actually read, that can be done i way less than an hour Depends naturally on the whole setup and actual workload, but if you have a high data rate change between backup times you may want to go for a SSD only system using ZFS or Ceph or the like (again depending on actual use case) which could do both cheap differential syncs.