reference: http://virtualization.sysprobs.com/access-physical-disk-virtualbox-desktop-virtualization-software http://vbox.innotek.de/pipermail/vbox-users/2009-August/006868.html http://ubuntuforums.org/showthread.php?t=951588 http://www.supergrubdisk.org/w/index.php5?title=Howto_Boot_Linux_only Background: Host: Windows 7 Ultimate 64 bit Guest: ubunut 9.04 64 bit VirtualBox: 3.0.8 (someone report 3.0.10 fail to access raw disk,maybe fix on .11/.12) Harddisk: 4 virtual disks on LSI 8344ELP RAID controller Disk /dev/sda: 42.9 GB, 42949410816 bytes Disk /dev/sdb: 64.4 GB, 64424509440 bytes Disk /dev/sdc: 763.7 GB, …