Groups > linux.debian.user > #200325

Re: Yet another UEFI/BIOS question

From	steve <dlist@bluewin.ch>
Newsgroups	linux.debian.user
Subject	Re: Yet another UEFI/BIOS question
Date	2018-09-20 09:00 +0200
Message-ID	<wA16p-eF-3@gated-at.bofh.it> (permalink)
References	<wzM7n-8j8-3@gated-at.bofh.it> <wzSmt-3Bs-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hi Pascal,

Thank you for your answer

Le 19-09-2018, à 23:30:40 +0200, Pascal Hambourg a écrit :

>Le 19/09/2018 à 16:50, steve a écrit :
>>
>>Googling around, I suspect that these errors come from the fact that the
>>BIOS is configured to but in Legacy mode (aka Bios mode) rather than in
>>the more modern UEFI mode. Just an hypothesis.
>>
>>But the problem is that my old sdd's have all (except /dev/sdd, 
>>which I just noticed) a msdos partition table:
>
>So what ?

Nothing, I just noticed that while writing my message.

>
>>Partition Table: gpt
>>1      1049kB  524MB  523MB   ntfs         Basic data partition          
>>2      524MB   629MB  105MB   fat32        EFI system partition          
>>3      629MB   646MB  16.8MB               Microsoft reserved 
>>partition  4      646MB   250GB  249GB   ntfs         Basic data 
>>partition
>>
>>Grub-pc is currently installed on /dev/sda1 (/boot) and /dev/sda.
>(...)
>>My questions are rather simple. Is it conceivable to convert the 
>>sdd's to gpt partition table (...) so I can switch my BIOS to UEFI?
>You don't need to convert anything. UEFI can use DOS partition tables.

I know since that's what I'm currently doing. But as mentioned in my
first message, I suspect the ACPI issues arising during boot time might
be linked to that fact. So that's why I'd like to try to be 100% UEFI
compliant. 

>All you need is an EFI system partition. As you can see above, Windows 
>already created one. You can mount it on /boot/efi and install GRUB 
>EFI.

Do you mean that I can use the Windows disk to dual boot and leave alone
the sda disk where I have the GNU/Linux system installed on?


>Note that registering GRUB into the UEFI boot variables requires to 
>boot in EFI mode. You can do it with a Debian installation or live 
>image.

Does that mean that I cannot

1) mount /boot/efi on windows disk on Debian's /mnt
2) install grub-efi on it
3) shutdown
4) modify the BIOS to load only in UEFI mode 
5) reboot

Thanks,

Steve

Thread

Yet another UEFI/BIOS question steve <dlist@bluewin.ch> - 2018-09-19 17:00 +0200
  Re: Yet another UEFI/BIOS question Darac Marjal <mailinglist@darac.org.uk> - 2018-09-19 17:30 +0200
    Re: Yet another UEFI/BIOS question steve <dlist@bluewin.ch> - 2018-09-19 18:00 +0200
  Re: Yet another UEFI/BIOS question Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-09-19 23:40 +0200
    Re: Yet another UEFI/BIOS question steve <dlist@bluewin.ch> - 2018-09-20 09:00 +0200
      Re: Yet another UEFI/BIOS question Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-09-20 20:30 +0200
        [SOLVED] Re: Yet another UEFI/BIOS question steve <dlist@bluewin.ch> - 2018-09-21 08:40 +0200
          Re: [SOLVED] Re: Yet another UEFI/BIOS question Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-09-21 20:30 +0200
            Re: [SOLVED] Re: Yet another UEFI/BIOS question steve <dlist@bluewin.ch> - 2018-09-22 07:00 +0200
              Re: [SOLVED] Re: Yet another UEFI/BIOS question Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-09-22 10:10 +0200
                Re: [SOLVED] Re: Yet another UEFI/BIOS question steve <dlist@bluewin.ch> - 2018-09-22 10:50 +0200
            And yet another UEFI/BIOS question: Work on both. Wayne Sallee <Wayne@WayneSallee.com> - 2018-09-23 17:00 +0200
              Re: And yet another UEFI/BIOS question: Work on both. Patrick Bartek <nemommxiv@gmail.com> - 2018-09-23 18:20 +0200
                Re: And yet another UEFI/BIOS question: Work on both. Wayne Sallee <Wayne@WayneSallee.com> - 2018-09-23 23:30 +0200
                Re: And yet another UEFI/BIOS question: Work on both. Patrick Bartek <nemommxiv@gmail.com> - 2018-09-24 03:00 +0200
                Re: And yet another UEFI/BIOS question: Work on both. David Wright <deblis@lionunicorn.co.uk> - 2018-09-24 21:20 +0200
                Re: And yet another UEFI/BIOS question: Work on both. Michael Stone <mstone@debian.org> - 2018-09-24 21:30 +0200
                Re: And yet another UEFI/BIOS question: Work on both. Pascal Hambourg <pascal@plouf.fr.eu.org> - 2018-09-27 15:10 +0200
              Re: And yet another UEFI/BIOS question: Work on both. David Wright <deblis@lionunicorn.co.uk> - 2018-09-23 20:40 +0200

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