grub - vlm - help virtualbox machine won't boot

Posted on 2011-10-11
Last Modified: 2012-05-12
background: Ubuntu Natty, VirtualBox 4.1.4, USA.

problem: a hard drive died. I replaced it and copied my .VDI (virtual hard disks) to that the new drive. My 3 Windows machines are working great. My OpenFiler VM (Ubuntu 64 bit) which uses LVM, simply says GRUB -- and never advances -- while booting, probably because the MBR changed enough to confuse GRUB. I'm not an expert in MBR and LVM to fix it. Please see attachments for details.

question: How do I tell grub to boot properly?
Question by:light-blue
    LVL 8

    Accepted Solution

    basically just need to get to a command like with your vm partition as the root /
    after that you can issue the:
    sudo update-grub
    command and it will rebuild your grub config.
    getting to the command prompt may be a pain - i cant remember if natty will let you use the boot cd to boot from the system partition.  if not you can extrapolate the guidance found here:
    LVL 1

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