Traceback (most recent call last):

 "<string>", line 1, in <module>

 "test.pyx", line 3, in test.test1 (test.c:396)
l.append( "A" )AttributeError: 'NoneType' object has no attribute 'append'
Traceback (most recent call last):


 "/usr/lib/python2.7/site-packages/ceph_volume/decorators.py", line 59, in newfunc

return f(*a, **kw)


 "/usr/lib/python2.7/site-packages/ceph_volume/main.py", line 149, in main

terminal.dispatch(self.mapper, subcommand_args)


 "/usr/lib/python2.7/site-packages/ceph_volume/terminal.py", line 194, in dispatch

instance.main()


 "/usr/lib/python2.7/site-packages/ceph_volume/devices/lvm/main.py", line 40, in main

terminal.dispatch(self.mapper, self.argv)


 "/usr/lib/python2.7/site-packages/ceph_volume/terminal.py", line 194, in dispatch

instance.main()


 "/usr/lib/python2.7/site-packages/ceph_volume/decorators.py", line 16, in is_root

return func(*a, **kw)


 "/usr/lib/python2.7/site-packages/ceph_volume/devices/lvm/batch.py", line 320, in main

self._get_strategy()


 "/usr/lib/python2.7/site-packages/ceph_volume/devices/lvm/batch.py", line 303, in _get_strategy

self.strategy = strategy.with_auto_devices(self.args, unused_devices)


 "/usr/lib/python2.7/site-packages/ceph_volume/devices/lvm/strategies/bluestore.py", line 25, in with_auto_devices

return cls(args, devices)


 "/usr/lib/python2.7/site-packages/ceph_volume/devices/lvm/strategies/bluestore.py", line 20, in __init__

self.validate_compute()


 "/usr/lib/python2.7/site-packages/ceph_volume/devices/lvm/strategies/strategies.py", line 30, in validate_compute

self.validate()


 "/usr/lib/python2.7/site-packages/ceph_volume/devices/lvm/strategies/bluestore.py", line 65, in validate

validators.no_lvm_membership(self.data_devs)


 "/usr/lib/python2.7/site-packages/ceph_volume/devices/lvm/strategies/validators.py", line 38, in no_lvm_membership

raise RuntimeError(msg % device.abspath)
RuntimeError: Unable to use device, already a member of LVM: /dev/sdb
