iSCSI off-load that is available on a variety of network cards, along with network policies that are similar to FCoE (never drop a packet) allow you to get the same speed/reliability as FCoE for a lot less.
FCoE requires that the networking gear drops only one packet in 10 million or something like it, if you can make the same guarantees for iSCSI, it is for all intents and purposes the same thing. With iSCSI off-load it is even better.
iSCSI also runs across your existing network stack, and doesn't require purchasing special equipment and is better supporter across a variety of different vendors, thereby making it easier to find the gear with the features you need, rather than settling for something that supports FCoE.
FCoE requires that the networking gear drops only one packet in 10 million or something like it, if you can make the same guarantees for iSCSI, it is for all intents and purposes the same thing. With iSCSI off-load it is even better.
iSCSI also runs across your existing network stack, and doesn't require purchasing special equipment and is better supporter across a variety of different vendors, thereby making it easier to find the gear with the features you need, rather than settling for something that supports FCoE.