Hi all, I merged today the last patches for supporting external leases. In storage domain version 4 (the default in ovirt 4.1), there is now a new volume named "xleases". When upgrading older storage domain (version 3), we create and format the new volume. If you used a development version with storage domain version 4, your storage domain may not work with current master. You should recreated such storage domain. As a workaround, you can create the special volume manually: File storage: sudo -u vdsm truncate -s 1G /rhev/data-center/mnt/server:_path/domain_uuid/dom_md/xleases Block storage: lvcreate --name xleases --size 1g domain_uuid Note that the volume should be also be formatted to actually use external leases, but having it should be good enough to keep the system happy. Thanks, Nir