Originally Posted by arnvid
Fiber Channel is the term for connecting storage generally over fiber.. low latency high speeds. And generally used for SANs -but can also be used with DAS.
strictly speaking, it is "fibre" channel when speaking of the communication, and "fiber" when talking about fiber optic cable or optical communication/signal transmission.
"fibre channel" is a communication protocol, which is directly incompatible with ethernet. However, FCoE - or "Fibre Channel Over Ethernet" is quite literally the transmission of FC protocols over an ethernet network, but not using TCP/IP frames. FC and FCoE are primarily used in storage networking.
Note that Fibre Channel can run over copper or optical cables, hence the distinction between "fibre" and "fiber".
Note that ethernet protocols such as TCP/IP can ALSO run over copper or optical cables. the electronics handling the physical communication are incompatible (you could not, for instance, connect an optical cable carrying Fibre Channel to an optical ethernet switch or network interface adapter *unless the device specifically supports dual formats*.)