root@ceph-mon1:/var/lib/ceph/osd# mount /dev/sdb1 /var/lib/ceph/osd/ceph-0
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.

dmesg | tail
...
[    9.942030] vmxnet3 0000:03:00.0 ens160: NIC Link is Up 10000 Mbps
[    9.949789] cgroup: new mount options do not match the existing superblock, will be ignored
root@ceph-mon1:/var/lib/ceph/osd# ceph-disk activate -h