Just to confirm, you created the raid from ssdb, ssdc and ssdd AFTER you had booted the original system configured under the Fedora GUI system? You were running this system when you re-created the RAID volume /dev/md0? I'm confused
If you created the RAID while running the OS, didn't you just format md0 which means that you've just overwritten your initial system? (apart from the /boot on ssda which contains the kernel)
You need to initialise disks and RAID systems BEFORE you load an OS surely?
Maybe I've missed something in what you've written...