만약에 rook-ceph을 재설치해야한다면, rook-ceph osd가 올라갔던 datadir (예를 들어 /dev/vdb ...) 을 클러스터마다 찾아가서 아래 방법으로 초기화해줘야한다.
DISK="/dev/<<<DATADIR NAME으로 수정>>>"
# Zap the disk to a fresh, usable state (zap-all is important, b/c MBR has to be clean)
sgdisk --zap-all $DISK
# <<<< HDD Volume인경우 >>>>
# Wipe a large portion of the beginning of the disk to remove more LVM metadata that may be present
dd if=/dev/zero of="$DISK" bs=1M count=100 oflag=direct,dsync
# <<<< SSD Volume인경우 >>>>
# SSDs may be better cleaned with blkdiscard instead of dd
blkdiscard $DISK
# Inform the OS of partition table changes
partprobe $DISK