+# probe filesystem metadata of optical drives which have a media inserted
+KERNEL=="sr*", ENV{ID_CDROM_MEDIA_TRACK_COUNT}=="?*", IMPORT{program}="vol_id --export --skip-raid --offset=$env{ID_CDROM_MEDIA_SESSION_LAST_OFFSET} $tempnode"
+
+# probe filesystem metadata of disks
+KERNEL!="sr*", IMPORT{program}="vol_id --export $tempnode"