bstor@ceph04:~$ sudo ceph-disk deactivate /dev/sdc1
Traceback (most recent call last):
  File "/usr/sbin/ceph-disk", line 9, in <module>
    load_entry_point('ceph-disk==1.0.0', 'console_scripts', 'ceph-disk')()
  File "/usr/lib/python2.7/dist-packages/ceph_disk/main.py", line 5011, in run
    main(sys.argv[1:])
  File "/usr/lib/python2.7/dist-packages/ceph_disk/main.py", line 4964, in main
    main_catch(args.func, args)
  File "/usr/lib/python2.7/dist-packages/ceph_disk/main.py", line 4989, in main_catch
    func(args)
  File "/usr/lib/python2.7/dist-packages/ceph_disk/main.py", line 3450, in main_deactivate
    main_deactivate_locked(args)
  File "/usr/lib/python2.7/dist-packages/ceph_disk/main.py", line 3485, in main_deactivate_locked
    status_code = _check_osd_status(args.cluster, osd_id)
  File "/usr/lib/python2.7/dist-packages/ceph_disk/main.py", line 3404, in _check_osd_status
    out_json = json.loads(out)
  File "/usr/lib/python2.7/json/__init__.py", line 339, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python2.7/json/decoder.py", line 364, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python2.7/json/decoder.py", line 382, in raw_decode
    raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded