Index: xen-4.0.0-testing/tools/python/xen/util/blkif.py
===================================================================
--- xen-4.0.0-testing.orig/tools/python/xen/util/blkif.py
+++ xen-4.0.0-testing/tools/python/xen/util/blkif.py
@@ -81,7 +81,7 @@ def parse_uname(uname):
 
         if typ == "drbd":
             if not fn.startswith("drbd"):
-                (drbdadmstdin, drbdadmstdout) = os.popen2(["/sbin/drbdadm", "sh-dev", fn])
+                (drbdadmstdin, drbdadmstdout) = os.popen2("/sbin/drbdadm "+"sh-dev "+fn)
                 fn = drbdadmstdout.readline().strip()
             else:
                 fn = "/dev/%s" %(fn,)