Well, that doesn't look odd at all. If you do an 'ls -al' in that /var/lib/pgsql directory, what do you see? A subdirectory beginning with a number as 9.4, 9.2, or something else, like maybe 'data'? And are absolutely certain that this volume is mounted? I know /proc/mounts says it is, but if nothing is under that directory, then either the volume disappeared or someone deleted it.