LINUX系统的VPS里挂载第二个硬盘且重装系统数据也不会丢失

1、查看系统里是否已经有了这个磁盘，命令及结果如下：

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[root@MyCloudServer ~]# fdisk -l

 

Disk /dev/xvdb: 75.2 GB, 75161927680 bytes

255 heads, 63 sectors/track, 9137 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x000d68a3

 

    Device Boot      Start         End      Blocks   Id  System

 

Disk /dev/xvda: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x0000aba6

 

    Device Boot      Start         End      Blocks   Id  System

/dev/xvda1   *           1          64      512000   83  Linux

Partition 1 does not end on cylinder boundary.

/dev/xvda2              64        1306     9972736   8e  Linux LVM

 

Disk /dev/mapper/vg_501153278-lv_root: 9135 MB, 9135194112 bytes

255 heads, 63 sectors/track, 1110 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

 

 

Disk /dev/mapper/vg_501153278-lv_swap: 1073 MB, 1073741824 bytes

255 heads, 63 sectors/track, 130 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00000000

看到了确实存在这个磁盘

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Disk/dev/xvdb:75.2GB,75161927680bytes

2、我们现在要将它建立新的分区

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fdisk /dev/xvdb

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[root@MyServer~]# fdisk /dev/xvdb

 

WARNING:DOS-compatiblemodeisdeprecated.It's strongly recommended to

         switch off the mode (command 'c') and change display units to

         sectors (command 'u').

 

Command(mforhelp):n

Commandaction

  e  extended

  p  primarypartition(1-4)

p

Partitionnumber(1-4):1

Firstcylinder(1-9137,default1):

Usingdefaultvalue1

Lastcylinder,+cylindersor+size{K,M,G}(1-9137,default9137):

Usingdefaultvalue9137

 

Command(mforhelp):t

Selectedpartition1

Hexcode(typeLtolistcodes):83

 

Command(mforhelp):w

Thepartitiontablehasbeenaltered!

 

Callingioctl()tore-readpartitiontable.

Syncingdisks.

[root@MyServer~]#

3、这样新分区就创立好了，下一步我们将该分区格式化为ext3的格式

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[root@MyServer ~]# mkfs.ext3 /dev/xvdb1

mke2fs 1.41.12 (17-May-2010)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

4587520 inodes, 18348230 blocks

917411 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=0

560 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

 

Writing inode tables: done                            

Creating journal (32768 blocks): done

Writing superblocks and filesystem accounting information: done

 

This filesystem will be automatically checked every 27 mounts or

180 days, whichever comes first.  Use tune2fs -c or -i to override.

[root@MyServer ~]#

4、然后我们挂载到需要的目录上，通常可以挂载在/home/web/这里，并开机自动挂载

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[root@MyServer~]# mkdir -p /home

[root@MyServer~]# mount /dev/xvdb1 /home

[root@MyServer~]# echo "/dev/xvdb1 /home ext3 defaults 1 3" >> /etc/fstab

如果您重装系统后，想保留这个数据，那么选择默认的只格式化系统盘就可以，如图：

然后再重复第4步即可。