查看硬盘：

# fdisk -l
...
Disk /dev/sdb: 274.9 GB, 274877906944 bytes
255 heads, 63 sectors/track, 33418 cylinders, total     536870912 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 identifier: 0x00000000
Disk /dev/sdb doesn"t contain a valid partition table

可以看到，有一块大小为256G的磁盘未初始化

格式化硬盘（如果需要多个分区，请先创建磁盘分区）：

# mkfs.ext4 /dev/sdb
mke2fs 1.42.9 (4-Feb-2014)
/dev/sdb is entire device, not just one partition!
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
16777216 inodes, 67108864 blocks
3355443 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
2048 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

查看磁盘的UUID：

# blkid
/dev/sda1: UUID="05003145-9b91-4943-aaa8-22cb496fd4d8" TYPE="ext4"
/dev/sda5: UUID="ca0012ba-2bf1-4d0b-94d3-3e4043746a14" TYPE="swap"
/dev/sdb: UUID="e23a1c1e-8d91-4df8-8fba-f0656a1080ab" TYPE="ext4"

记录下/dev/sdb（刚才格式化的分区）的UUID。

注意：你看到的UUID的值与例子不同

编辑/etc/fstab

# editor /etc/fstab

添加以下行

UUID=e23a1c1e-8d91-4df8-8fba-f0656a1080ab    /home    ext4    defaults,errors=remount-ro    0    1

注意：UUID替换为上一步你获取到的值

P.S./home为你要挂载的目标目录

现在重启电脑，应用新的磁盘配置

# reboot

查看磁盘配置：

# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       8.8G  1.3G  7.1G  15% /
none            4.0K     0  4.0K   0% /sys/fs/cgroup
udev            8.2G  4.0K  8.2G   1% /dev
tmpfs           1.7G  492K  1.7G   1% /run
none            5.0M  8.0K  5.0M   1% /run/lock
none            8.2G     0  8.2G   0% /run/shm
none            100M     0  100M   0% /run/user
/dev/sdb        252G   60M  239G   1% /home