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I've got a dual boot system on my disk:

  • Windows 10 64-bit: main OS
  • Ubuntu 64-bit: secondary OS

I installed VirtualBox; I'm trying to use my real Linux partition as a Virtual Machine using Windows as the host. I've used the methods described here.

Grub loads from the bootloader and allows me to select Ubuntu. I go through the loading screen, but never make it to the login page. Instead, it puts me into emergency mode on SystemD:

Emergency mode systemd

Looking into the logs, it seems that the VM is running a read-only system. How do I make the VM run a Read-write file system?

  • Ubuntu works completely fine when booted on its own
  • I have a CPU that supports 64-bit
  • I have EFI booting on my computer and on VirtualBox, because they literally demand it
  • I have virtualization on in BIOS, for sure (I've quadruple checked)
Bryan
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  • After reading the blog you posted, please post the output of wmic diskdrive list brief /format:list on Windows 10, and the output of fdisk -l from a Ubuntu LiveCD/USB. – eyoung100 Jun 21 '16 at 18:23
  • wmic diskdrive list on Windows (partition 4): http://pastebin.com/SyKPSLaw fdisk -l on my real Ubuntu partition (partition 6): http://pastebin.com/dbbCW843 Will do it from live Ubuntu as well, need to find my USB – Bryan Jun 21 '16 at 22:26
  • What is the output of: VBoxManage internalcommands listpartitions -rawdisk /dev/sda – eyoung100 Jun 21 '16 at 22:41

2 Answers2

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I have exacly same problem I followed these instructions and I end up with same error. Solution which allow me to complete booting process was to

edit sudo nano /etc/fstab

and comment line with /boot/efi (by using #)

Gajush
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Only your host OS, Windows 10, requires EFI. You need to disable EFI on the VM. Afterwards treat the virtual machine as if EFI didn't exist, and read How to install Ubuntu on VirtualBox?.

Community
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eyoung100
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  • See, the reason why I have EFI booting on is because now with the option unchecked I am getting "FATAL: INT18: BOOT FAILURE" – Bryan Jun 21 '16 at 01:54
  • Recreate the virtual machine – eyoung100 Jun 21 '16 at 01:59
  • Doesn't seem to change anything. My apologies if my post seemed vague, but I'm trying to virtualize an existing partition of Ubuntu. – Bryan Jun 21 '16 at 02:06
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    You cant virtualize a mounted partition. See VirtualBox INT18 Boot Failure and replace CDROM with your partition, For that matter I dont believe you can do what your attempting because the partition is not in the vmdk format. A virtual machine actually virtualizes a file. – eyoung100 Jun 21 '16 at 02:15