fdisk -l

[root@MyVPS ~]# fdisk -l
Disk /dev/xvda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/xvda1 * 1 13 104391 83 Linux
/dev/xvda2 14 1044 8281507+ 8e Linux LVM

Disk /dev/xvdb: 23.6 GB, 23622320128 bytes
255 heads, 63 sectors/track, 2871 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System

对/dev/xvdb(此名称因系统而异)进行分区：

fdisk /dev/xvdb

[root@MyVPS ~]# fdisk /dev/xvdb
The number of cylinders for this disk is set to 2871.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)

输入n新建分区

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p

/dev/xvdb中第1个分区

Partition number (1-4): 1
First cylinder (1-2871, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-2871, default 2871):
Using default value 2871

输入W保存退出

Command (m for help): w

The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.

将新分区xvdb1(此名称因系统而异)格式化为ext3或ext4格式

mkfs -t ext3 /dev/xvdb1

[root@MyVPS ~]# mkfs -t ext3 /dev/xvdb1
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
2883584 inodes, 5765319 blocks
288265 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
176 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks:

32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000

Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 24 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.

我们示范将新分区xvdb1挂载到目录/home1
新建目录/home1，然后挂载

mkdir /home1
mount /dev/xvdb1 /home1

完成后我们通过df -hal可以看到，新分区已经挂载到目录/home1上了

[root@MyVPS ~]# df -hal

/dev/xvdb1 22G 173M 21G 1% /home1

最后添加开机自动挂载：

echo "/dev/xvdb1 /home1 ext3 defaults 1 2" >> /etc/fstab

这样就完成了！

通过面板重装后的处理
重新建立目录/home1，然后重新挂载，xvdb1的文件内容不受影响
mkdir /home1

mount /dev/xvdb1 /home1
最后，重新添加自动挂载即可：
echo "/dev/xvdb1 /home1 ext3 defaults 1 2" >> /etc/fstab