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I currently have both Ubuntu 10.04 LTS and Windows 7 installed on my Machine in dual boot. Prior to 10.04, I was able to fully virtualize my physically installed Ubuntu setup on Windows 7 using virtualbox and grub1. I had followed this tutorial. Now, I have upgraded my distribution to 10.04 LTS, removed grub1 and installed grub2 to it (since the upgrade wouldn't remove grub legacy) and tried to follow this tutorial even though it was listed working only on 9.10. As expected, I cannot seem to boot into my OS from Win 7 with grub 2 with Virtualbox. Dual booting into any OS though works perfectly.

I get the following grub2 error when launching the virtual vdi: Unknown file system.

Does anyone know a related issue or tutorial (or better, someone that knows the answer!) that could help me virtualize my physical installation of Ubuntu 10.04?

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Physical disks inside of Vbox is almost always painful. You can use raw disk access(not recommended) or reinstall grub from a virtual livecd once a vdi is loaded.

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You can allow raw disk access, check http://www.virtualbox.org/manual/ch09.html#rawdisk

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  • Well that is exactly what I am doing just like the tutorials impose when using VBoxManage
    – Steven Rosato
    Commented Nov 29, 2010 at 5:25
  • Are you 100% sure nothing else is accessing the disk? check lsof. I had that error once because I left cfdisk running while I was trying to access the disk through VB.
    – OneOfOne
    Commented Nov 29, 2010 at 15:18

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