Ubuntu - host. Windows 7 guest (but real system)

[JulianDC]

I have installed Ubuntu 13.10 SS with Virtual Box on it. (dev/sda2)

I want to run installed windows 7 (already exists on dev/sda1) real system

I created windows7.vmdk using this instruction -
help.ubuntu.РУ/wiki/virtualbox
kubuntu.РУ/node/11199

created grub.iso for loader
created windows.vmdk image using

~/.VirtualBox/VM$ sudo VBoxManage internalcommands createrawvmdk -filename /home/$USER/sdb.vmdk -rawdisk /dev/sda1
(My real Windows 7 system installed on dev/sda1)
it ends seccesfull.

But my system cant load
1. I see grub menu and chose WIndows 7 string
2. After that it shows just black screen

It can whisper
1 that my image of disk created wrong
2 Grub cant find windows7 by that path.
but how to create normal image of may be something other wrong?

[JulianDC]

may be I need to give some rights to virtual box for using direction dev/sda1?

[JulianDC]

IS that forum of pro users who knows Virtual Box very good?

[Perryg]

Due to the topic being for expert users no one wants to help you trash your system. That said your answer is in the manual.
Chapter 9.9.1.2 Access to individual physical hard disk partitions, and see the part about -relative.