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Category: Virtualization

Resizing a VirtualBox Linux VDI Disk under Windows Host – VBoxManage error – Resize hard disk operation for this format is not implemented yet!

Using my VirtualBox linux machines (KaliLinux in my case) together with applying a couple of updates brought a problem, where the VB machine starts run out of disk space and I'm not able to update neither extend the system. This could be an often problem once we are trying to save some host system hard disk space using a small initial size of virtual machine disk partitions (12GB here).

The disk file cmd (df) reports:


Upgrade on Virtualbox 4.3.4 – fail to start virtual machines – VT-x error

I'm using virtualbox to run couple of my virtual machines inside of the Windows 7 64bit. Two days ago I have upgraded my running Virtualbox software to new version 4.3.4. After upgrade I was not able to start and run any of my virtual machines (Win7 32it, Xubuntu, KaliLinux, Mint) which works fine inside of previous virtualbox version.
After start I have received window with message telling that VT-x is disabled inside of the BIOS. The log file I have found inside one of the machines telling the same:

VirtualBox – how to assign more video memory as 128MB

Graphical desktops (for example Mageia) usually run faster with more video memory, however VBox application (through setting menu) allows setup the maximal size of video mamory to 128MB only. We are able add more memory using command line. The maximal value is now 256MB.

Windows (tested under win 7 64bit)

1) go to the VBox install directory and start win command line there