ceph -s
ceph osd tree | grep down
ceph osd find 1
service ceph status
ps -ef | grep "ceph-osd" | grep "\-i 1\b"
mount | grep "ceph-1\b"
lsblk | grep ceph "ceph-1\b"
umount /dev/sda2
lsblk | grep ceph "ceph-1\b"
xfs_repair /dev/sda2
service ceph restart osd.1