How to resize VirtualBox Disk

VirtualBox中我们可以使用多种磁盘格式，有vmdk（虚拟机磁盘），vdi（VirtualBox 磁盘映像），vhd（虚拟硬盘）

在VirtualBox中，如何使用了vmdk格式的磁盘，当磁盘空间用尽时，除了新增磁盘外，我们还可以通过下面的方法扩大磁盘的容量

如果直接扩张会出现以下的错误

C:\Program Files\Oracle\VirtualBox>VBoxManage.exe modifymedium e:\vm\ohs5\ohs5-disk1.vmdk --resize 40960
0%...
Progress state: VBOX_E_NOT_SUPPORTED
VBoxManage.exe: error: Resize medium operation for this format is not implemented yet!

C:\Program Files\Oracle\VirtualBox>
C:\Program Files\Oracle\VirtualBox>VBoxManage createhd --filename e:\vm\ohs5\ohs5.vdi --size 40960
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
Medium created. UUID: c7b78b15-9c71-4eeb-9d68-28cb45781731

C:\Program Files\Oracle\VirtualBox>VBoxManage clonehd e:\vm\ohs5\ohs5-disk1.vmdk --existing e:\vm\ohs5\ohs5.vdi
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
Clone medium created in format 'VDI'. UUID: c7b78b15-9c71-4eeb-9d68-28cb45781731
C:\Program Files\Oracle\VirtualBox>

然后可以通过fdisk增加新的分区，然后可以直接格式化分区或通过LVM等方式添加

[root@ohs5 ~]# mkfs.ext4 /dev/sda3
mke2fs 1.43-WIP (20-Jun-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
2105344 inodes, 8417732 blocks
420886 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
257 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

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

[root@ohs5 ~]#

如果想继续使用vmdk格式，可以通过下面的方式把vdi格式转化为vmdk

C:\Program Files\Oracle\VirtualBox>VBoxManage.exe clonehd G:\virtual\od\ohs1.vdi G:\virtual\od\od.vmdk --format VMDK
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
Clone medium created in format 'VMDK'. UUID: a7c779c6-0925-4700-8f2e-6d379518181b

C:\Program Files\Oracle\VirtualBox> 

Reference

https://www.virtualbox.org/manual/ch08.html

https://www.virtualbox.org/manual/index.html