Post by Jeff Asher (thank you)
A LOOK BACK AT FCoE and iSCSI HISTORY — There are two entrenched standards for block storage protocols over Ethernet networks. FCoE was ratified in 2009, while iSCSI was ratified in 2004. Of course, various vendors and early adopters supported these protocols before ratification, so the history of these protocols is a couple of years longer than it looks, respectively. While iSCSI simply encapsulates the SCSI protocol in IP, FCoE operates lower in the network stack and to do so required many enhancements to Ethernet. While iSCSI runs on any IP network (mostly Ethernet these days), FCoE requires Data Center Bridging and Converged Network Adapters all running at 10 Gbps or faster.
Read on here