Re: Having the configuration file embedded into core.img look for the grub partition by its label - Vladimir 'φ-coder/phcoder' Serbinenko

From: "Vladimir 'φ-coder/phcoder' Serbinenko" <phcoder@gmail.com>
To: The development of GNU GRUB <grub-devel@gnu.org>
Subject: Re: Having the configuration file embedded into core.img look for the grub partition by its label
Date: Fri, 26 Sep 2014 21:00:39 +0200	[thread overview]
Message-ID: <5425B7D7.2010404@gmail.com> (raw)
In-Reply-To: <54212B29.80907@gmx.fr>

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On 23.09.2014 10:11, Arbiel Perlacremaz wrote:
> Having the grub directory on the external device is not what I'm looking
> for.
> 
> I indeed use several external devices and I've installed GRUB on each of
> them so that it is always available, whatsoever my configuration is. To
> avoid confusion when updating GRUB, all my fstab files mount a unique
> directory, always the same, on /boot/grub. This is the reason why I want
> GRUB on my hard drive.
> 
Upgrading modules without rerunning grub-install on all devices is not
supported. It may work for few revisions but when core functions change
it will break.
> 
> Le 23/09/2014 01:09, Vladimir 'φ-coder/phcoder' Serbinenko a écrit :
>> On 22.09.2014 22:49, Arbiel Perlacremaz wrote:
>>> Hi
>>>
>>> A way I'm using to avoid any Window's reinstallation to overwrite GRUB
>>> in a multiboot environment is to install the later on the MBR of a USB
>>> key. That way, when booting with no key pluged, the PC boots into
>>> Windows and when booting with the key pluged, the PC boots according to
>>> the choice of the user in the grub menu's.
>>>
>>> I do locate the grub.cfg file in a partition of the internal hard drive.
>>> In such a situation, grub-install embeddes a config file which reads
>>> something like
>>>
>>>     search.fs_uuid 367C9BBD7C9B75F9 root hd0,msdos1
>>>     set prefix=($root)'/'
>>>
>>> This is great.
>>>
>>> However, any undesired modification by any piece of software of the
>>> partition's uuid will prevent GRUB to find it and lead to a boot
>>> failure. As the Windows partition is less prone to such modifications as
>>> Linux partitions, I do locate the grub.cfg file in that Windows
>>> partition. However it would be more straightforward to locate the file
>>> into a Linux partition, and to have grub search this partition by its label.
>>>
>>> How could this be done ? If this can't presently be done, can it be
>>> included in a future grub release ?
>> use --boot-directory to place all files on usb stick and make it load
>> any other grub.cfg you might want.
>>> Regards
>>>
>>> Arbiel
>>>
>>> _______________________________________________
>>> Grub-devel mailing list
>>> Grub-devel@gnu.org
>>> https://lists.gnu.org/mailman/listinfo/grub-devel
>>>
>>
>>
>>
>> _______________________________________________
>> Grub-devel mailing list
>> Grub-devel@gnu.org
>> https://lists.gnu.org/mailman/listinfo/grub-devel
> 
> 
> _______________________________________________
> Grub-devel mailing list
> Grub-devel@gnu.org
> https://lists.gnu.org/mailman/listinfo/grub-devel
> 


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