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I have a Samsung ATIV Book 8 with Windows 8.1 and Ubuntu 13.10 on the internal 1T drive. Recently I acquired a 250G external USB hard drive. I booted the Samsung from the same USB thumb drive that I had used to install Ubuntu 13.10 on the internal drive but chose to install Ubuntu 13.10 on the entire external USB 250G hard drive, but, and this is important, I set the device for the bootloader as /dev/sda5 which is the boot partition on the INTERNAL drive for the original Ubuntu.

Now - with the external USB drive connected, I hit F10 and boot from the Linux boot loader which brings up the Grub2 menu and I can choose either of the two Ubuntus (the internal or the external) and boot and all is well.


If I disconnect the external USB drive and hit F10 on boot up and select the Linux boot loader, I do NOT get the grub2 menu, and can not choose to boot from the internal Ubuntu. I get an error and it drops immediately into grub in a terminal.

So, the problem is, IF I do not have the external drive connected, I can NOT get to the grub2 menu and therefore can not boot to the INTERNAL Ubuntu.

Any advice would be greately appreciated.


Update 12/3/2013 --- Well, I have not solved it yet, and I do not understand it yet but I have found a work-around. If I boot the Samsung without the external drive connected, I get dropped into the grub CLI. I can then issue the following commands and it will boot Ubuntu from the internal drive.

grub> linux (hd0,5)/boot/vmlinuz-3.11.0-14-generic root=/dev/sda5

grub> initrd (hd0,5)/boot/initrd.img-3.11.0-14-generic

grub> boot

I am just posting this in case it may somehow help someone else. I am sure when I have time to read more about groub2 (which is great) I will understand it and fix it correctly.

Thanks for reading


share|improve this question
Are all systems installed in UEFI boot mode. May be best to see details. help.ubuntu.com/community/Boot-Info –  oldfred Dec 3 '13 at 18:33

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