扩展oracle VM VirtualBox硬盘容量

1.首先对于box的扩展，只支持VDI VHD两种格式
DOC下，访问到vbox安装目录下：

//VirtualBox  的安装目录cd D:\Oracle\VirtualBox  d:

如果硬盘是vmdk格式，首先需要克隆并转格式，命令如下：
VDI:

VBoxManage clonehd "C:\Users\pactera\VirtualBox VMs\centos\centos.vmdk" "C:\Users\pactera\VirtualBox VMs\centos\centos.vdi" --format VDI

VHD:

VBoxManage clonehd "C:\Users\pactera\VirtualBox VMs\centos\centos.vmdk" "C:\Users\pactera\VirtualBox VMs\centos\centos.vhd" --format VHD

其他实用命令：

删除
D:\Oracle\VirtualBox>VBoxManage storagectl <”C:\Users\pactera\VirtualBox VMs\cen
tos\centos.vdi”> –remove
浏览
D:\Oracle\VirtualBox>VBoxManage.exe list hdds

2、修改硬盘大小
示例为：15G即25600M

VBoxManage modifyhd "C:\Users\pactera\VirtualBox VMs\centos\centos.vhd" --resize 25600

3、用新增的空间新建分区

[root@localhost ~]# fdisk /dev/sdaWelcome to fdisk (util-linux 2.23.2).Changes will remain in memory only, until you decide to write them.Be careful before using the write command.Command (m for help): mCommand action   a   toggle a bootable flag   b   edit bsd disklabel   c   toggle the dos compatibility flag   d   delete a partition   g   create a new empty GPT partition table   G   create an IRIX (SGI) partition table   l   list known partition types   m   print this menu   n   add a new partition   o   create a new empty DOS partition table   p   print the partition table   q   quit without saving changes   s   create a new empty Sun disklabel   t   change a partition's system id   u   change display/entry units   v   verify the partition table   w   write table to disk and exit   x   extra functionality (experts only)Command (m for help): nPartition type:   p   primary (3 primary, 0 extended, 1 free)   e   extendedSelect (default e): pSelected partition 4No free sectors availableCommand (m for help): xfs_growfs /dev/mapper/centos-root enter后输入w再enter

4、用以下命令可以看到 多了一个/dev/sda3的分区

[root@localhost ~]# fdisk -l
Disk /dev/sda: 26.8 GB, 26843545600 bytes, 52428800 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 label type: dos
Disk identifier: 0x000d51e5

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 20971519 9436160 8e Linux LVM
/dev/sda3 20971520 52428799 15728640 83 Linux

Disk /dev/mapper/centos-root: 24.7 GB, 24687673344 bytes, 48218112 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 /dev/mapper/centos-swap: 1073 MB, 1073741824 bytes, 2097152 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

c . reboot 重启，然后格式化/dev/sda3
mkfs.ext3 /dev/sda3

5、创建物理卷
[root@localhost ~]# pvcreate /dev/sda3
Physical volume “/dev/sda3” successfully created

使用新增物理卷扩展vg
[root@localhost ~]# vgextend centos /dev/sda3
Volume group “centos” successfully extended

[root@localhost ~]#xfs_growfs /dev/mapper/centos-root

6、lvresize -l +100%FREE /dev/mapper/centos-root

Size of logical volume centos/root changed from <8.00 GiB (2047 extents) to 22.99 GiB (5886 extents).
Logical volume centos/root successfully resized.

7、最后扩展在线扩展文件系统：
[root@localhost ~]#xfs_growfs /dev/mapper/centos-root

说明： 很多资料是说这个: resize2fs -f /dev/mapper/centos-root
但是报错，因为centOS默认文件系统是xfs的只能用，NND坑了我好久（直到看到别人的http://blog.itpub.net/24486203/viewspace-1790666）才知道要用这个:xfs_growfs
/dev/mapper/centos-root

[root@localhost ~]#df -h

Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 23G 3.6G 20G 16% /
devtmpfs 486M 0 486M 0% /dev
tmpfs 497M 0 497M 0% /dev/shm
tmpfs 497M 6.7M 490M 2% /run
tmpfs 497M 0 497M 0% /sys/fs/cgroup
/dev/sda1 1014M 125M 890M 13% /boot
tmpfs 100M 0 100M 0% /run/user/0

/dev/sda3 20971520 52428799 15728640 83 Linux

报错：
1>操作过程如果有报错：
WARNING: Re-reading the partition table failed with error 22:
执行：
[root@localhost ~]#/sbin/kpartx -a /dev/sda3
后继续操作

参考文章：
主：http://blog.csdn.net/laiyangwen1120/article/details/51036404
其他：
http://blog.163.com/zhu329599788@126/blog/static/66693350201731521131776/

http://blog.csdn.net/weiguang1017/article/details/52252448

https://zhidao.baidu.com/question/468894513.html