[SOLVED] Re: Changing grub default boot order

[Jim Byrnes]

On 03/30/2013 02:57 AM, Colin Law wrote:
> On 29 March 2013 22:41, JD <jd1008 at gmail.com> wrote:
>>
>> On 03/29/2013 01:00 PM, Colin Law wrote:
>>>
>>> On 29 March 2013 18:01, Jim Byrnes <jf_byrnes at comcast.net> wrote:
>>>>
>>>> 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.
>>>
>>> The reason I said that there may be confusion is that if the kernel in
>>> 12.04 is updated and it runs update-grub I am not sure that the right
>>> files will get updated for the new kernel to appear in the menu.
>>> Someone who knows more about how it all works would have to answer
>>> that.
>>>
>>> Colin
>>
>>
>> That is why I had asked: during install of 12.04, on which
>> disk did the OP choose to install the grub.
>> If he had chosen sdb, the while booting and running off of sdb, and
>> the system is updated, the new kernel will indeed reside on sdb.
>> If the OP had chosed sda, then the new updated kernel will go
>> to sda.
>
> I believe that when the OP installed 12.04 the other disk was not connected.
>
> Colin
>

That is correct.

Regards,  Jim