ceph log

root@sto0:~#  ceph osd tree

# id    weight  type name       up/down reweight
-1      8       root default
-3      6               rack unknownrack
-2      4                       host sto0
0       1                               osd.0   up      1
1       1                               osd.1   up      1
2       1                               osd.2   up      1
3       1                               osd.3   up      1
-4      2                       host sto1
4       1                               osd.4   up      1
5       1                               osd.5   up      1
6       2               osd.6   up      1

root@sto0:~#