rename to disk.go
rename to disk.go

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