diff --git a/compare_checksums.py b/compare_checksums.py
index 7a7286d..3a7450c 100644
--- a/compare_checksums.py
+++ b/compare_checksums.py
@@ -4,6 +4,7 @@ import pathlib
 import subprocess
 
 from copy_snapshots_to_remote import get_member_name
+from create_snapshot_backup import call, remote_call
 
 SSH_KEY_FILE = "/mnt/Datenspeicher/snap-backup-dataset/backup_key"
 SSH_REMOTE = "zfs_snap_backup@etha.cpi.imtek.uni-freiburg.de"
@@ -16,7 +17,7 @@ ZFS_ELAB_PREFIX = "elabfs-"
 TMP_BACKUP_FOLDER = "/mnt/Datenspeicher/snap-backup-dataset/temporary-backups"
 
 
-def remote_call(arguments):
+def xremote_call(arguments):
     """ makes runs an command on the remote backup server
 
     :params arguments: list of command line arguments and parameters
@@ -31,19 +32,38 @@ def remote_call(arguments):
     return result.stdout
 
 
-def get_local_backup_members():
+def get_local_backups():
     tmp_folder = pathlib.Path(TMP_BACKUP_FOLDER)
-    backups = (i for i in tmp_folder.iterdir() if i.suffix==".gz")
-    return {get_member_name(b.name) for b in backups}
+    return [i for i in tmp_folder.iterdir() if i.suffix==".gz"]
 
 
-def get_remote_checksums():
-    result = {}
-    for member in get_local_backup_members():
-        remote_path =  f"{REMOTE_PATH}/{member}/\*"
-        cmd_result = remote_call(["sha256sum", remote_path])
-        print(cmd_result)
+def get_remote_checksum(local_backup_path):
+    member = get_member_name(local_backup_path.name)
+    remote_path =  f"{REMOTE_PATH}/{member}/{local_backup_path.name}"
+    try:
+        result = remote_call(["sha256sum", remote_path])
+        parts = result.strip().split()
+        return parts[0].strip()
+    except subprocess.CalledProcessError as e:
+        print(f"ERROR: {remote_path} -> {e.stderr}")
+        return None
+
+def get_local_checksum(local_backup_path):
+    result = call(["sha256", str(local_backup_path), as_text=True)
+    parts = result.split("=")
+    return parts[1].strip()
+
+def batch_check()
+    for local_backup_path in get_local_backups():
+        remote_checksum = get_remote_checksum(local_backup_path)
+        local_checksum = get_local_checksum(local_backup_path)
+        if remote_checksum is None:
+            print("?    {local_checksum} -> (error)")
+        elif remote_checksum == local_checksum:
+            print("     {local_checksum} -> {remote_checksum}")
+        else
+            print("XXX  {local_checksum} -> {remote_checksum}")
 
 
 if __name__ == "__main__":
-    get_remote_checksums()
+    batch_check()