Some notes on software development... RSS 2.0
# Friday, 23 August 2013 have a great article describing how to shrink a VirtualBox disk image with lots of screenshots, but here are the basic steps for shrinking a VirtualBox image that runs a Windows 7 guest OS. This only works on VDI disk images.

On the Windows 7 guest OS follow these steps:

  1. Uninstall any unused programs
  2. Delete any files you don’t need
  3. Run Disk Cleanup Start->All Programs->Accessories->System Tools->Disk Cleanup
  4. Download CCLEANER and run it.
  5. Run Disk Defragmenter Start->All Programs->Accessories->System Tools->Disk Defragmenter
  6. Download SDELETE and run this command: sdelete –z C:\

The guest Windows 7 OS has now had all the free space zeroed out and is ready for compacting. So from a command line on the host OS:

  1. Navigate to the VirtualBox installation folder, on my Windows 7 x64 OS it’s located here: C:\Program Files\Oracle\VirtualBox\
  2. Run: vboxmanage modifyvdi YOUR-VDI-FILENAME.vdi compact

Job done!

How To Shrink Your Virtualbox VM And Free Up Space For Your Hard Disk

Friday, 23 August 2013 08:04:31 (GMT Standard Time, UTC+00:00)  #    -
# Thursday, 06 March 2008

Rather annoyingly Virtual PC 2004 & 2007 set the default folder location for Virtual Machine Configuration (.vmc) and Virtual Hard Disk (.vhd) files to a folder called My Virtual Machines in your My Documents.
This means users could inadvertently end up saving huge VPC disk images to their My Documents folder, not good if you use profile roaming ;-)

Luckily we can add a new environment variable called MYVIRTUALMACHINES with our preferred default location.


The next time Virtual PC is loaded it will pick up the environment variable as the new default.

Thursday, 06 March 2008 15:54:17 (GMT Standard Time, UTC+00:00)  #    -

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