There's no "file-io" and "block-io" settings when making a fibre channel volume. There's an "initialize," so perhaps it's like file-io, but whatever. There's a place where you select what block size to use (512B, 1024B, 2048B, or 4096B) and whether you want volume replication. I'm assuming that 4096B would be the best setting, usually, right? (Unless you're writing really tiny pieces of data, like with a database...)

What are the other options that I should be aware of? (Keep in mind that this is fibre channel, not iscsi)

Also, is it reasonable to expect a little higher throughput with fibrechannel (given the same linespeed) since there isn't the tcp/ip overhead?

We are planning to use build 3278, unless you recommend the Atlanta version for any good reason.