删除/dev/sdf的所有分区

mkfs.ext4 /dev/sdf

[root@node61 /home/deploy]# lsblk 
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
...
sdf               8:80   0   20G  0 disk 
├─sdf1            8:81   0   15G  0 part 
└─sdf2            8:82   0    5G  0 part 


[root@node61 /home/deploy]# mkfs.ext4 /dev/sdf
mke2fs 1.42.9 (28-Dec-2013)
/dev/sdf is entire device, not just one partition!
无论如何也要继续? (y,n) y
文件系统标签=
OS type: Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
1310720 inodes, 5242880 blocks
262144 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=2153775104
160 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks: 
    32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
    4096000

Allocating group tables: 完成                            
正在写入inode表: 完成                            
Creating journal (32768 blocks): 完成
Writing superblocks and filesystem accounting information: 完成 



[root@node61 /home/deploy]# lsblk 
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   20G  0 disk 
├─sda1            8:1    0    1G  0 part /boot
└─sda2            8:2    0   19G  0 part 
  ├─centos-root 253:0    0   17G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0   15G  0 disk 
├─sdb1            8:17   0   10G  0 part /var/lib/ceph/osd/ceph-0
└─sdb2            8:18   0    5G  0 part 
sdc               8:32   0   15G  0 disk 
├─sdc1            8:33   0   10G  0 part /var/lib/ceph/osd/ceph-1
└─sdc2            8:34   0    5G  0 part 
sdd               8:48   0   10G  0 disk 
└─sdd1            8:49   0    5G  0 part 
sde               8:64   0   20G  0 disk 
├─sde1            8:65   0   15G  0 part 
└─sde2            8:66   0    5G  0 part 
sdf               8:80   0   20G  0 disk