Re: Grub2 with multiple Debians
On Sat, 15 Sep 2012 13:40:16 +0400, Dmitriy Matrosov wrote:
> On 09/15/12 00:42, Hendrik Boom wrote:
>> On Fri, 14 Sep 2012 23:25:03 +0300, Andrei POPESCU wrote:
>>
>>> On Vi, 14 sep 12, 17:12:38, Hendrik Boom wrote:
>>>>
>>>> Of course, after I've made my copy (with slight changes to
>>>> /etc/fstab) I have two nearly identical sets of partitions, so it may
>>>> be tricky to tell them apart. Is grub2 clever enough to figure it
>>>> all out anyway? And what data does it use to this end? (so I can make
>>>> sure it's right!)
>>>
>>> UUIDs? What failure mode(s) do you have in mind, because I can't think
>>> of any.
>>
>> It probably is os-prober that I mean. The misconfiguration I have in
>> mind is matching one system's /boot with another systems's /. I've had
>> it happen on a laptop sometime ago. and it sure messed up my upgrades.
>> I have no idea how it happened, but it has made me paranoid.
>>
>> -- hendrik
>>
>>
>>
>>
> Hi.
>
> Useless entries in grub.cfg (with non-matched kernel and root, e.g.
> kernel from stable and root from testing) or probably even no correct
> one - is normal for 30_os-prober and 10_linux scripts. I don't think,
> that there is a simply way to fix them.
You'd think that os-prober could use the entries in /etc/fstab to
identify the /boot that goes with a particular root partition.
(That assumes, or course, that /etc is in the root partition and not
separately mounted. But if it was separately mounted, there would be no
way for it to read /etc/fstab in order to find out what to mount for /
etc.)
-- hendrik
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