I wonder how many consumer level HDDs in RAID5 will take to saturate a 10Gbps connection. My napkin math says that from 1,250 MB/s we can achieve around 1,150 MB/s due to network overhead so it means about 5 Red Pro/ Ironwolf Pro (reading at about 250–260 MB/s each) in RAID5 to saturate the connection.

I though raid5 is highly discouraged