Gluster users - Oct 2011 - Adding secondary mount point

Greetings,

I have glusterfs 3.2.3 installed with one mount point directory
(/data/export). Due to the capacity, we add another disk and mount in
the /data/export2 for example. I have read the documentation but still
dont' understand on how to add the new disk into glusterfs server.
It's preferred to see one (big) logical mount point from the client if
possible, but make another another mount point is fine too.

Server (glusterd.vol):
volume posix
  type storage/posix
  option directory /data/export
end-volume

volume locks
  type features/locks
  subvolumes posix
end-volume

volume brick
  type performance/io-threads
  option thread-count 8
  subvolumes locks
end-volume

volume server
  type protocol/server
  option transport-type tcp
  option auth.addr.brick.allow 172.16.10.*
  subvolumes brick
end-volume

Client (glusterfs.vol):

volume remote1
  type protocol/client
  option transport-type tcp
  option remote-host 172.16.10.2
  option remote-subvolume brick
end-volume

volume distribute
  type cluster/distribute
  subvolumes remote1
end-volume

volume writebehind
  type performance/write-behind
  option window-size 1MB
  subvolumes distribute
end-volume

volume cache
  type performance/io-cache
  option cache-size 512MB
  subvolumes writebehind
end-volume

Thank you.

Regards,
Asfihani