--- a/lib/storage/bdev.py       2018-09-06 19:20:03.970318746 +0000
+++ b/lib/storage/bdev.py       2018-09-06 19:18:59.799346241 +0000
@@ -413,6 +413,16 @@
     if not self.minor and not self.Attach():
       # the LV does not exist
       return
+
+    import glob
+
+    for partdev in glob.glob("/dev/mapper/%s-%sp*" % (self._vg_name, self._lv_name.replace("-", "--"))):
+        result = utils.RunCmd(["dmsetup", "remove", partdev])
+
+        if result.failed:
+          base.ThrowError("Can't dmsetup remove %s: %s-%s",
+                          partdev, result.fail_reason, result.output)
+