boot – Creating a VirtualBox image from a physical Ubuntu Machine

I am trying to create a virtualbox image from a physical ununtu machine. I already have a raw image of the physical disk that I got using:

dd if=/dev/sda1 of=/mnt/f/disk.raw bs=1024

Then converted this image to VMDK using this command:

VBoxManage convertfromraw /mnt/f/disk.raw /mnt/f/disk.vmdk --format VMDK

After that I created a new virtual machine in Virtual box. I choose “Linux” and “Ubuntu 64-bit” when creating the image then I choose the vmdk file that I created as the hard disk.

Now when I run the image I am getting this error: “No bootable Medium found!”

I made sure that it’s using the hard disk to boot. Your help is much appreciated I have been stuck on this for a while now!