diff -r b04cc8651a63 -r c69e5911888d hgext/relink.py
--- a/hgext/relink.py	Mon Nov 11 22:59:26 2013 +0100
+++ b/hgext/relink.py	Sat Nov 09 14:50:58 2013 +0100
@@ -48,6 +48,10 @@
         ui.status(_('there is nothing to relink\n'))
         return
 
+    if not util.samedevice(src.store.path, repo.store.path):
+        # No point in continuing
+        raise util.Abort(_('source and destination are on different devices'))
+
     locallock = repo.lock()
     try:
         remotelock = src.lock()