Comment # 7 on bug 1095744 from Josef Reidinger

(In reply to Stefan Hundhammer from comment #6)
> After a "device not found" exception by libstorage, the code (unclear if
> Ruby RootPart.rb or somewhere in libstorage) tries to get more info by
> calling /sbin/udevadm info UUID=..., but that command does not accept UUIDs.
> 
> So, we'll need to handle this situation in a better way: If there is an
> entry in /etc/fstab that refers to a nonexistent filesystem, we need a more
> graceful error handling.

correct way to call that udevadm command is

udevadm info /dev/disk/by-uuid/23b55cd4-bf24-4d6a-acd1-2aa1e2d3870e

so if you have UUID=X

then you need to call it as 

udevadm info /dev/disk/by-uuid/X