Ceph

Hi,

I'm using ceph-docker and when running

ceph-disk -v prepare ${OSD_DEVICE} ${OSD_JOURNAL}

It comes to the point where it's time to run blkid. But the problem is that prepare have earlier created /dev/sda1, and blkid is running against /dev/sda, which doesn't contain a xfs partition. So ceph-disk fails and the docker container ends up in a boot loop.
Referring to the original issue at the ceph-docker project [[https://github.com/ceph/ceph-docker/issues/324]]

command: Running command: /sbin/blkid -p -s TYPE -o value -- /dev/sda
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 4994, in run
    main(sys.argv[1:])
  File "/usr/lib/python2.7/dist-packages/ceph_disk/main.py", line 4945, in main
    args.func(args)
  File "/usr/lib/python2.7/dist-packages/ceph_disk/main.py", line 3299, in main_activate
    reactivate=args.reactivate,
  File "/usr/lib/python2.7/dist-packages/ceph_disk/main.py", line 3009, in mount_activate
    e,
ceph_disk.main.FilesystemTypeError: Cannot discover filesystem type: device /dev/sda: Line is truncated:

I wondering if it just shouldn't run blkid against /dev/sd?1..