So what if it is a fiber channel over ethernet drive?

I got bad news for you: they're always unreliable.

I've got a setup where the network filesystem is more reliable than the local filesystem. The local filesystem is running on a RAID-0 with fiber channel over ethernet and the network storage is a RAID-5 of a bunch of RAM block devices all linked over infiniband.

Your typical SSD these days is effectively a very complex distributed RAID, but it pretends to be a very simple local disk... and that's what most local filesystems are running on.

Honestly, NFS was designed to run over UDP originally. Failure was totally an option. When I was in school, the NFS filesystem was way more reliable than the local filesystems on the same computer. Yes, distributed filesystems are hard, but... NFS is comparatively straightforward for a lot of what passes for "reliable" these days.