[SOLVED] Re: Changing grub default boot order

[Jim Byrnes]

On 03/29/2013 12:40 PM, Jim Byrnes wrote:
<snip>

>>> I also found some info on the web about changing GRUB_DEFAULT=. I tried
>>> changing it to GRUB_DEFAULT=14. (sdb1 is on line 15) and I tried
>>> changing it
>>> to "Ubuntu, with Linux 3.2.0-39 generic (on /dev/sdb1)". Both of
>>> these were
>>> suggestions I found on line but neither worked.
>>
>> You may be changing it on the wrong file.  Remember there will be one
>> on each disk.  I think as you have it you probably have to boot into
>> the old ubuntu (so the default boot) and change it there.  this is
>> going to cause continuous confusion however, hence my suggestion to
>> boot off the second disk by one means or another.
>
> Something else I never thought of.  Not sure what confusion you are
> referring to here. Anyway I am going to try this before making anymore
> physical changes.
>

Changing both files worked.  The sdb1 line is highlighted and it boots 
to 12.04.  The only side effect seems to be sda1 line no longer appears 
in the menu.  I can curor up to the first kernal entry and boot to 10.04 
so that's not a problem.

Thanks Colin for this solution.

Regards,  Jim

>> Alternatively, you could boot into the new Ubuntu and, assuming that
>> it is booting of /dev/sda, then run
>> sudo grub-install /dev/sda
>> and
>> sudo update-grub
>>
>> That should re-install grub with the new one as the default.
>
> The new Ubuntu is on /dev/sdb. Not having a real good idea of how all
> this works I worry a little abut this confusing my system.
>
>> You have backed up everything important on both disks before doing any
>> of this haven't you?  There is always some risk involved in this sort
>> of activity.
>
>
> As luck would have it I just did a full backup yesterday.  I spent the
> first part of the week working with a the author of Backintime to get it
> to do a snapshot of my system.  There was nothing wrong with Backintime,
> I made a couple poor choices in what to backup.  I might add that he was
> very supportive and worked with me until I was able to get a good backup.
>
>
> Regards,  JIm
>
>