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-rw-r--r--nova/virt/disk/mount.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/nova/virt/disk/mount.py b/nova/virt/disk/mount.py
index be2f22ba0..e499e8e8e 100644
--- a/nova/virt/disk/mount.py
+++ b/nova/virt/disk/mount.py
@@ -30,6 +30,8 @@ class Mount(object):
to be called in that order.
"""
+ mode = device_id_string = None # to be overridden in subclasses
+
def __init__(self, image, mount_dir, partition=None, device=None):
# Input