Linux VPS 挂载磁盘ext3格式(重装系统数据不丢失)

傲游出于数据保护机制，我们都会给客户准备2块硬盘，一块用来存放用户数据（即网站数据等），一块用来存放系统，这样在您的系统出现问题之后后台选择重装系统，另外一个磁盘分区的数据就不会丢失了，所以在购买VPS之后，要手动将另外一块硬盘挂载到用户数据的目录。这个机制有一个缺点就是存放系统的分区将无法应用于用户数据（网站数据等），所以如果您需要充分利用您的磁盘，您可以挂载磁盘为LVM格式，教程参考这里：Linux
VPS 挂载磁盘LVM格式(充分利用磁盘)傲游主机不提供Raid10，请注意备份数据！

下面教程开始：

[root@MyVPS ~]# fdisk -l （查看磁盘分区）

Disk /dev/xvdb: 7516 MB, 7516192768 bytes
255 heads, 63 sectors/track, 913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/xvdb doesn't contain a valid partition table

Disk /dev/xvda: 10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 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
/dev/xvda3            1045        1305     2096482+  8e  Linux LVM
[root@MyVPS ~]# df -hal //*查看已划分区空间使用情况*//
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
9.3G  1.2G  7.7G  13% /
proc                     0     0     0   -  /proc
sysfs                    0     0     0   -  /sys
devpts                   0     0     0   -  /dev/pts
/dev/xvda1             99M   29M   66M  31% /boot
tmpfs                 151M     0  151M   0% /dev/shm
none                     0     0     0   -  /proc/sys/fs/binfmt_misc
sunrpc                   0     0     0   -  /var/lib/nfs/rpc_pipefs
[root@MyVPS ~]# fdisk /dev/xvdb //*对硬盘/dev/xvdb进行增加分区操作*//
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that, of course, the previous
content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

Command (m for help): n //*输入n新建分区*//
Command action
e   extended
p   primary partition (1-4)
p //*输入p主分区*//
Partition number (1-4): 1 //*输入1第一个分区*//
First cylinder (1-913, default 1): //*回车跳过*//
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-913, default 913): //*回车跳过*//
Using default value 913

Command (m for help): w //*输入W保存退出*//
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@MyVPS ~]# mkfs -t ext3 /dev/xvdb1 //*将新分区xvdb1(此名称因系统而异)格式化为ext3格式*//
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
917504 inodes, 1833410 blocks
91670 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=1879048192
56 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

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

This filesystem will be automatically checked every 21 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to overri
8c0a
de.
[root@MyVPS ~]# mount /dev/xvdb1 /home //*将新分区xvdb1挂载到目录/home*//
[root@MyVPS ~]# df -hal
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
9.3G  1.2G  7.7G  13% /
proc                     0     0     0   -  /proc
sysfs                    0     0     0   -  /sys
devpts                   0     0     0   -  /dev/pts
/dev/xvda1             99M   29M   66M  31% /boot
tmpfs                 151M     0  151M   0% /dev/shm
none                     0     0     0   -  /proc/sys/fs/binfmt_misc
sunrpc                   0     0     0   -  /var/lib/nfs/rpc_pipefs
/dev/xvdb1            6.9G  144M  6.4G   3% /home
[root@MyVPS ~]# echo "/dev/xvdb1 /home ext3 defaults 1 2" >> /etc/fstab //*添加开机自动挂载*//
//*S4 Did For aoyouhost*//

注意事项：

1.请勿在有数据存于/home目录的情况下进行此操作，请注意备份数据。

2.尽管理论上可以实现重装系统第二块磁盘的数据不丢失，但是我们依然强烈建议您备份好自己的数据，备份才是王道！