rename to disk.go
rename to disk.go

pault84/openstorage,libopenstorage/openstorage,kunalkushwaha/openstorage,ModelRocket/openstorage,libopenstorage/openstorage,pault84/openstorage,phoenix-io/openstorage,ModelRocket/openstorage,jvinod/ost,libopenstorage/openstorage,pault84/openstorage