#重新分区干掉，然后wipefs -af /dev/sdc1清理一下分区
这样可以让原来残留ceph数据的硬盘能重新加入osd，同时也能满足同一块硬盘分N个区给N个OSD缓存区使用
sudo parted /dev/sdc mklabel gpt
sudo parted /dev/sdc mkpart primary 0% 25%
sudo parted /dev/sdc mkpart primary 25% 50%
sudo parted /dev/sdc mkpart primary 50% 75%
sudo parted /dev/sdc mkpart primary 75% 100%
sudo mkfs.ext4 /dev/sdc1
sudo mkfs.ext4 /dev/sdc2
sudo mkfs.ext4 /dev/sdc3
sudo mkfs.ext4 /dev/sdc4
#清空3块分区，重启后可作为ceph OSD挂载
wipefs -af /dev/sdc1
wipefs -af /dev/sdc2
wipefs -af /dev/sdc3
wipefs -af /dev/sdc4
lsblk
