方式：LVM方式

第一步 增加分区：

1、VM—>编辑设置—>硬盘 下扩大磁盘(菜单操作不再赘复)。

2、使用fdisk 命令

fdisk  /dev/sda

＃用n命令建个P类型的磁盘，然后用t命令更改ID为8e(LVM类别)。

#  p查看一下：

Disk /dev/sda: 17.1 GB, 17179869184 bytes

255 heads, 63 sectors/track, 2088 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *           1          13      104391   83  Linux

/dev/sda2              14        1044     8281507+  8e  Linux LVM

/dev/sda3            1045        1545     4024282+  8e  Linux LVM

最后w保存

3、重启一下服务器，不然挂载不上新建的sda3、sda4，

备注：如果在原来的VM磁盘基础上来扩大，一定要重启服务器。不然有可能报错。

如下报错No free sectors available

第二步 加入VLM:

root#mkfs.ext3 /dev/sda3                   ##格式化新增的分区)

root#lvm

lvm>pvcreate /dev/sda3                     ##创建LVM硬分区

Physical volume "/dev/sda3" successfully created

lvm> vgextend VolGroup00 /dev/sda3          ##加入与/目录同一个LVM组

Volume group "VolGroup00" successfully extended

查看一下：

lvm>pvdisplay

--- Physical volume ---

PV Name               /dev/sda2

VG Name               VolGroup00

PV Size               7.90 GB / not usable 23.41 MB

Allocatable           yes (but full)

PE Size (KByte)       32768

Total PE              252

Free PE               0

Allocated PE          252

PV UUID               ua5FJN-jSLL-bGkp-w0XO-N8JG-MBR0-1yDzGW

--- Physical volume ---

PV Name               /dev/sda3

VG Name               VolGroup00

PV Size               3.84 GB / not usable 25.96 MB

Allocatable           yes

PE Size (KByte)       32768

Total PE              122

Free PE               122

Allocated PE          0

PV UUID               mHKWzk-mQ1o-jkQB-0DZC-PVqW-w2R9-14y19G

把sda3变为LVM的虚拟磁盘(增加容量的关键)

lvm>vgextend /dev/VolGroup00/LogVol102 /dev/sda3

第三步 增加 /目录容量

lvm> lvextend -L +3.8G /dev/VolGroup00/LogVol00

Rounding up size to full physical extent 3.81 GB

Extending logical volume LogVol00 to 9.69 GB

Logical volume LogVol00 successfully resized

# resize2fs /dev/VolGroup00/LogVol00        ##还要重新一下识别磁盘容量

resize2fs 1.39 (29-May-2006)

Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required

Performing an on-line resize of /dev/VolGroup00/LogVol00 to 2539520 (4k) blocks.

The filesystem on /dev/VolGroup00/LogVol00 is now 2539520 blocks long.

最终确认结果：

lvm> lvdisplay

--- Logical volume ---

LV Name                /dev/VolGroup00/LogVol00

VG Name                VolGroup00

LV UUID                r9eG4x-njBD-z2HT-lmL2-2l81-P3XV-KVd0e4

LV Write Access        read/write

LV Status              available

# open                 1

LV Size                9.69 GB

Current LE             310

Segments               2

Allocation             inherit

Read ahead sectors     auto

- currently set to     256

Block device           253:0

增加一块新硬盘

1。增加前先关闭VM，然后编辑VM属性，增加一个vritual disk(scsi)，其实是增加一个虚拟磁盘文件。

hard disk2就是我新增加的

2。查看目前的磁盘结构

[root@mail ~]# fdisk -l

Disk /dev/sda: 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/sda1   *           1          13      104391   83  Linux

/dev/sda2              14         905     7164990   83  Linux

Disk /dev/sdb: 1073 MB, 1073741824 bytes

255 heads, 63 sectors/track, 130 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

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

//说明磁盘/dev/sdb还没有被系统识别

3。分区

[root@mail ~]# fdisk /dev/sbd

Command (m for help): n  //输入m获得帮助信息，n创建分区

Command action

e   extended

p   primary partition (1-4)

p //创建主分区

Partition number (1-4): 1 //指定分区的起始柱面

First cylinder (1-130, default 1):

Using default value 1

Last cylinder or +size or +sizeM or +sizeK (1-130, default 130):  //设置分区容量，直接回车表示全部

Using default value 130

Command (m for help): t //改变一个分区的系统ID

Selected partition 1

Hex code (type L to list codes): L //查看文件类型对应的Hex

85  Linux extended //linux  ext3的hex是85

Hex code (type L to list codes): 85

You cannot change a partition into an extended one or vice versa

Delete it first.

Command (m for help): p //列出当前硬盘的分区

Disk /dev/sdb: 1073 MB, 1073741824 bytes

255 heads, 63 sectors/track, 130 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System

/dev/sdb1               1         130     1044193+  83  Linux

Command (m for help): w  //保存

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

4。查看现在的分区

[root@mail ~]# fdisk -l

Disk /dev/sda: 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/sda1   *           1          13      104391   83  Linux

/dev/sda2              14         905     7164990   83  Linux

Disk /dev/sdb: 1073 MB, 1073741824 bytes

255 heads, 63 sectors/track, 130 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System

/dev/sdb1               1         130     1044193+  83  Linux

5。格式化分区

[root@mail ~]# mkfs.ext3 /dev/sdb1  //格式化成ext3格式

6。挂载分区

[root@mail ~]# mount /dev/sdb1 /tmp

[root@mail ~]# df -h  /tmp

Filesystem            Size  Used Avail Use% Mounted on

/dev/sdb1            1004M  1.3M  952M   1% /tmp

7。自动挂载

修改/etc/fstab

增加一行

/dev/sdb1               /sdb1                   ext3    defaults        0 0

重起