Ceph

When I set up the development environment according to the official guide, it reports this problem.

ERROR: error accessing '/home/ceph/ceph/src/dev/osd0/*'
add osd0 f6bf7412-1e1d-4105-a901-474bd5c53b87

• DEVELOPER MODE: setting PATH, PYTHONPATH and LD_LIBRARY_PATH ***
  0
• DEVELOPER MODE: setting PATH, PYTHONPATH and LD_LIBRARY_PATH ***
  add item id 0 name 'osd.0' weight 1 at location {host=centos-linux,root=default} to crush map
  2016-07-30 17:38:39.221437 7f274c8267c0 -1 journal FileJournal::_open: disabling aio for non-block journal. Use journal_force_aio to force use of aio anyway
  2016-07-30 17:38:39.222047 7f274c8267c0 -1 journal check: ondisk fsid 7f521cbd-afa4-4d59-8630-c5c214f645bf doesn't match expected f6bf7412-1e1d-4105-a901-474bd5c53b87, invalid (someone else's?) journal
  2016-07-30 17:38:39.246990 7f274c8267c0 -1 journal FileJournal::_open: disabling aio for non-block journal. Use journal_force_aio to force use of aio anyway
  2016-07-30 17:38:39.250233 7f274c8267c0 -1 filestore(/home/ceph/ceph/src/dev/osd0) could not find -1/23c2fcde/osd_superblock/0 in index: (2) No such file or directory
  2016-07-30 17:38:39.273350 7f274c8267c0 -1 created object store /home/ceph/ceph/src/dev/osd0 journal /home/ceph/ceph/src/dev/osd0.journal for osd.0 fsid 93d9a950-ec69-49c9-9f55-a4dafcc4b8b6
  2016-07-30 17:38:39.273476 7f274c8267c0 -1 auth: error reading file: /home/ceph/ceph/src/dev/osd0/keyring: can't open /home/ceph/ceph/src/dev/osd0/keyring: (2) No such file or directory
  2016-07-30 17:38:39.273730 7f274c8267c0 -1 created new key in keyring /home/ceph/ceph/src/dev/osd0/keyring
  adding osd0 key to auth repository
• DEVELOPER MODE: setting PATH, PYTHONPATH and LD_LIBRARY_PATH ***
  added key for osd.0
  start osd0
  ./ceph-osd -i 0 -c /home/ceph/ceph/src/ceph.conf
  starting osd.0 at :/0 osd_data /home/ceph/ceph/src/dev/osd0 /home/ceph/ceph/src/dev/osd0.journal