diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index a236a12..74192f7 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -121,10 +121,6 @@
   makeint("boot_size")
 
   d["fstab"] = LoadRecoveryFSTab(zip)
-  if not d["fstab"]:
-    if "fs_type" not in d: d["fs_type"] = "yaffs2"
-    if "partition_type" not in d: d["partition_type"] = "MTD"
-
   return d
 
 def LoadRecoveryFSTab(zip):
@@ -134,9 +130,7 @@
   try:
     data = zip.read("RECOVERY/RAMDISK/etc/recovery.fstab")
   except KeyError:
-    # older target-files that doesn't have a recovery.fstab; fall back
-    # to the fs_type and partition_type keys.
-    return
+    raise ValueError("Could not find RECOVERY/RAMDISK/etc/recovery.fstab")
 
   d = {}
   for line in data.split("\n"):
@@ -350,9 +344,6 @@
     p = info_dict["fstab"][mount_point]
     fs_type = p.fs_type
     limit = info_dict.get(p.device + "_size", None)
-  else:
-    fs_type = info_dict.get("fs_type", None)
-    limit = info_dict.get(target + "_size", None)
   if not fs_type or not limit: return
 
   if fs_type == "yaffs2":
@@ -777,9 +768,4 @@
   if fstab:
     return PARTITION_TYPES[fstab[mount_point].fs_type], fstab[mount_point].device
   else:
-    devices = {"/boot": "boot",
-               "/recovery": "recovery",
-               "/radio": "radio",
-               "/data": "userdata",
-               "/cache": "cache"}
-    return info["partition_type"], info.get("partition_path", "") + devices[mount_point]
+    return None