I am creating a new cluster, and I initially set it up without an sbd (since my
shared disk wasn't up at OS install). I got multipathd setup and /dev/md-0 is
the map to the shared disk of 50 MB. fdisk shows it as empty (no partitions).
When I try to run sbdutil -c -d /dev/dm-0 I get
"evms_get_object_handle_for_name: No such file or directory". I tried using the
/dev/disk/by-{uuid,id,name,etc} and they all give the same thing.

What am I doing wrong?