Desktop Virtual Machine Tips
mount virtual disk
original reference: How to mount a VirtualBox VDI image.
The following the essential steps needed
# you need to be root ## max_part is needed, as sometimes it defaults to 0 modprobe nbd max_part=16 # nbd0 is established by last cmd qemu-nbd -c /dev/nbd0 .VirtualBox/Machines/win_xp/LargeData.vdi mount /dev/mbd0p1 /mnt/tmp