On Sat, 2 Jun 2018 02:49:39 -0500, VanguardLH wrote:

USB2 is [theoretically] 480 Mbps. Does the customer's computer have a
NIC that can support 1 Gbps? If so, how about a NAS drive? Obviously
the customer cannot swamp their network with traffic due to the
collision detection and conflict handling of the Ethernet protocol. If
he downloads huge files from the Internet or passed them between his
intranet hosts, issues huge print jobs, or otherwises dumps on his
network then the NAS drive will get slower because its portion of the
remaining bandwidth gets smaller.

If there's a concern about bandwidth exhaustion, as described above, I'd
just install a second 1gig NIC. Even good ones are cheap these days.
Connect the new NIC directly to the NAS, effectively removing backup
traffic from the primary LAN. Any Ethernet cable is fine, no crossover
needed. If multiple computers need to be backed up using the 'backup
LAN', add a 2nd NIC to each of them and stick a Gig switch in the middle
to make the physical connections. Problem solved. Not explicitly stated,
but hopefully obvious, configure the 2nd NICs and the NAS to use a
subnet different from the primary LAN. No default gateway needed.

USB2 is 0.48 Gbps. NAS would be 1 Gbps. USB3 would be 5 Gbps. eSATA
would be 6 Gbps.

USB3.1 Type C has 10gig versions. I haven't seen a NAS that supports
that yet, but I haven't checked. They could be out there, at a price.

--

Char Jackson