centos虚拟机挂载新磁盘

确认新挂载的磁盘

[root@share-redis ~]# fdisk -l

Disk /dev/sda: 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: 0x000e05e5

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 4196351 2097152 83 Linux
/dev/sda2 4196352 88082431 41943040 83 Linux
/dev/sda3 88082432 104466431 8192000 82 Linux swap / Solaris

Disk /dev/sdb: 214.7 GB, 214748364800 bytes, 419430400 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

在新挂载的磁盘上创建主分区

[root@share-redis ~]# fdisk /dev/sdb
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 0xe8f92863.

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 (2048-419430399, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-419430399, default 419430399):
Using default value 419430399
Partition 1 of type Linux and of size 200 GiB is set

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@share-redis ~]# partprobe /dev/sdb

对新创建的分区进行格式化

[root@share-redis ~]# fdisk -l

Disk /dev/sda: 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: 0x000e05e5

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 4196351 2097152 83 Linux
/dev/sda2 4196352 88082431 41943040 83 Linux
/dev/sda3 88082432 104466431 8192000 82 Linux swap / Solaris

Disk /dev/sdb: 214.7 GB, 214748364800 bytes, 419430400 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: 0xe8f92863

Device Boot Start End Blocks Id System
/dev/sdb1 2048 419430399 209714176 83 Linux

[root@share-redis ~]# mkfs.ext4 /dev/sdb1
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
13107200 inodes, 52428544 blocks
2621427 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2199912448
1600 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, 20480000, 23887872

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

建立新目录，挂载到刚创建的新分区上

[root@share-redis ~]# mkdir /data
[root@share-redis ~]# mount /dev/sdb1 /data

确认分区和目录的状态和大小

[root@share-redis ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 40G 3.6G 34G 10% /
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 9.9M 7.8G 1% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/sda1 2.0G 147M 1.7G 8% /boot
tmpfs 1.6G 12K 1.6G 1% /run/user/42
tmpfs 1.6G 0 1.6G 0% /run/user/0
/dev/sdb1 197G 61M 187G 1% /data

修改启动项，启动时自动挂载

[root@share-redis ~]# echo "/dev/sdb1 /data ext4 defaults 0 0" >> /etc/fstab

重启服务器

[root@share-mysql ~]# reboot

再次确认分区和目录

[root@share-redis ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 40G 3.6G 34G 10% /
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 10M 7.8G 1% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/sdb1 197G 61M 187G 1% /data
/dev/sda1 2.0G 147M 1.7G 8% /boot
tmpfs 1.6G 8.0K 1.6G 1% /run/user/42
tmpfs 1.6G 0 1.6G 0% /run/user/0

操作完毕！