Gluster users - Feb 2015 - volume create: gsfiles: failed: /gfiles/data is already part of a volume

Hi

I have somehow put my Gluster 3.6 in a state where I am unable to create any
volumes. Even having unmounted all Gluster-related mounts, deleting all relevant
files/directories I get the following error when attempting to create a volume.
Here is what I am trying to do:
> mkdir -p /gfiles/data
> mount /dev/mapper/vg.files-lvfiles /gfiles -o
noatime,errors=remount-ro,data=writeback
> gluster volume create gsfiles replica 2 transport tcp
10.2.3.100:/gfiles/data  10.2.4.100:/gfiles/data
volume create: gsfiles: failed: /gfiles/data is already part of a volume

It does not matter if I create completely new directories, mounts and volume
names. I get the same error. I have re-installed Gluster. I have restarted all
services.
I am on CentOS6.4.

What could be going on here? Anything I can do?

Regards,
Eric Mortensen