Oct 29 08:16:11 localhost kernel: [1338849.034909] EXT4-fs (sdb): mounted filesystem with ordered data mode. Opts: (null)
Oct 29 08:16:11 localhost systemd[1]: Unit backup.mount is bound to inactive unit dev-sdc.device. Stopping, too.
Oct 29 08:16:11 localhost systemd[1]: Unmounting /backup...
Oct 29 08:16:11 localhost systemd[1]: Unmounted /backup.
Oct 29 08:16:11 localhost systemd[1]: Unit backup.mount entered failed state.