$ VBoxManage clonevdi source_file new_file
・複製する仮想ディスクディレクトリーに移動
・複製コマンド
$ cd ~/Library/VirtualBox/HardDisks/
$ /Applications/VirtualBox.app/Contents/MacOS/VBoxManage clonevdi CentOS.vdi CentOS2.vdi
Sun VirtualBox Command Line Management Interface Version 3.1.4
(C) 2005-2010 Sun Microsystems, Inc.
All rights reserved.
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
Clone hard disk created in format 'VDI'. UUID: 59fcb470-7876-4d1b-a9f2-31a61b3c1776
参考にした映像
http://www.youtube.com/watch?v=nBb9pyGJdeU
