1、查看硬盘信息，看看是否需要分区
[root@host-10-1-1-68 ~]# fdisk -l
Disk /dev/vda: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000ba41f
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 2099199 1048576 83 Linux
/dev/vda2 2099200 41943039 19921920 8e Linux LVM
Disk /dev/mapper/centos-root: 18.2 GB, 18249416704 bytes, 35643392 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-swap: 2147 MB, 2147483648 bytes, 4194304 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/vdb: 53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
2、对硬盘进行分区操作, 没有输入的直接回车
[root@host-10-1-1-68 ~]# fdisk /dev/vdb
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0xc4d5568d.
Command (m for help): p
Disk /dev/vdb: 53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xc4d5568d
Device Boot Start End Blocks Id System
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-104857599, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-104857599, default 104857599):
Using default value 104857599
Partition 1 of type Linux and of size 50 GiB is set
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
查看新的分区
[root@host-10-1-1-68 ~]# fdisk -l
3、分区好的盘格式化
[root@host-10-1-1-68 ~]# mkfs.ext4 /dev/vdb
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
3276800 inodes, 13107200 blocks
655360 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2162163712
400 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, 7962624, 11239424
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
4、挂在分区
[root@host-10-1-1-68 ~]# mkdir /var/lib/docker/
[root@host-10-1-1-68 ~]# mount /dev/vdb /var/lib/docker/
[root@host-10-1-1-68 ~]# cd /var/lib/docker/
[root@host-10-1-1-68 docker]# ls
lost+found
[root@host-10-1-1-68 docker]# touch q.sh
[root@host-10-1-1-68 docker]# vi q.sh
[root@host-10-1-1-68 docker]#
[root@host-10-1-1-68 docker]# ls
lost+found q.sh
[root@host-10-1-1-68 docker]# cat q.sh
iiii
[root@host-10-1-1-68 docker]# rm -rf q.sh
[root@host-10-1-1-68 docker]# cd
[root@host-10-1-1-68 ~]#
[root@host-10-1-1-68 ~]#
[root@host-10-1-1-68 ~]# umount /dev/vdb
[root@host-10-1-1-68 ~]# vi /etc/fstab
/dev/mapper/centos-root / xfs defaults 0 0
UUID=4cda1b18-f3f4-4031-bd45-71768526a9f8 /boot xfs defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0
/dev/vdb /var/lib/docker/ ext4 defaults 0 0
[root@host-10-1-1-68 ~]# reboot
[root@host-10-1-1-68 ~]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/centos-root 17811456 999188 16812268 6% /
devtmpfs 3994028 0 3994028 0% /dev
tmpfs 4005084 0 4005084 0% /dev/shm
tmpfs 4005084 16724 3988360 1% /run
tmpfs 4005084 0 4005084 0% /sys/fs/cgroup
/dev/vdb 51474912 53272 48783816 1% /var/lib/docker
/dev/vda1 1038336 145676 892660 15% /boot
tmpfs 801020 0 801020 0% /run/user/0
5、磁盘繁忙解决
切换到别的目录再卸载即可