Re: Grub rescue

[David WE Roberts]

On Mon, 25 Mar 2013 09:36:45 +0400, Andrey Borzenkov wrote:

> On Mon, Mar 25, 2013 at 8:19 AM, Jordan Uggla
> <address@hidden> wrote:
>> On Sun, Mar 24, 2013 at 3:19 PM, David WE Roberts
>> <address@hidden> wrote:
>>> Now the 3TB [when did the notation move from GB to GiB?] permanent
>>> data disc has turned up I need to move my partitions across from an
>>> MBR disc to a GPT disc but keep the booting organisation effectively
>>> the same.
>>>
>>> So I seem to be stuck in a transition between old and new disc
>>> formats, and old and new BIOS formats.
>>
>> The normal procedure is to just run grub-install and (if needed)
>> grub-mkconfig after making whatever partitioning changes you want. Is
>> there any reason you can't do that?
>>
>>
> To run grub-install you need to boot first, and to boot you need access
> to /boot/grub and to access /boot/grub you need part_gpt. Which is not
> available until you can access /boot/grub. Catch 22.

Yeah - summary of my problem to date.

Presumably enabling GPT with grub-install will allow me to use the grub 
rescue prompt to get the copy of Ubuntu on the GPT disc booted up.

All I need now is the correct set of grub rescue commands to achieve this.

Cheers

Dave R