diff --git a/zfs_autobackup/ZfsAutoverify.py b/zfs_autobackup/ZfsAutoverify.py
index 38d3f8c..993acda 100644
--- a/zfs_autobackup/ZfsAutoverify.py
+++ b/zfs_autobackup/ZfsAutoverify.py
@@ -6,6 +6,7 @@ from .ZfsAuto import ZfsAuto
 from .ZfsNode import ZfsNode
 import sys
 
+raise("need to be rewritten to use zfs-check")
 
 # # try to be as unix compatible as possible, while still having decent performance
 # def compare_trees_find(source_node, source_path, target_node, target_path):
diff --git a/zfs_autobackup/ZfsCheck.py b/zfs_autobackup/ZfsCheck.py
index 190a809..f0a0cab 100644
--- a/zfs_autobackup/ZfsCheck.py
+++ b/zfs_autobackup/ZfsCheck.py
@@ -106,7 +106,7 @@ class ZfsCheck(CliBase):
 
             time.sleep(1)
 
-        raise (Exception("Timeout while waiting for /dev entry to appear. (looking in: {})".format(locations)))
+        raise (Exception("Timeout while waiting for /dev entry to appear. (looking in: {}). Hint: did you forget to load the encryption key?".format(locations)))
 
     def cleanup_zfs_volume(self, snapshot):
         """destroys temporary volume snapshot"""