VBoxManage modifyhd disk.vdi compact
http://maketecheasier.com/shrink-your-virtualbox-vm/2009/04/06
http://www.dedoimedo.com/computers/virtualbox-shrink-expand-disks.html
VBoxManage modifyhd disk.vdi compact
http://maketecheasier.com/shrink-your-virtualbox-vm/2009/04/06
http://www.dedoimedo.com/computers/virtualbox-shrink-expand-disks.html