From what I know about the Fedora on ARM,
Please check your "what you know" against the current situtation, it's
very easy to let obsolete impressions carry forth, but they're no
longer applicable.
they use a rather scary looking pile of development boards with very
poor I/O.
Buy a trimslice and run it with iSCSI. It's a very clean package, and
I can get 80 MB/sec to my file server's disks. That is neither
"scary" nor "poor I/O".
http://www.delorie.com/arm/trimslice/iscsi.html