diff --git a/azurelinuxagent/daemon/resourcedisk/default.py b/azurelinuxagent/daemon/resourcedisk/default.py
index df4bb76f8..17473e732 100644
--- a/azurelinuxagent/daemon/resourcedisk/default.py
+++ b/azurelinuxagent/daemon/resourcedisk/default.py
@@ -373,6 +373,7 @@ def mkfile(self, filename, nbytes):
         if blocks > 0:
             ret = shellutil.run(dd_cmd.format(dd_maxbs, blocks, fn_sh)) << 8
 
+        dd_cmd += " oflag=append"
         remains = int(nbytes % dd_maxbs)
         if remains > 0:
             ret += shellutil.run(dd_cmd.format(remains, 1, fn_sh))