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Re: And yet another UEFI/BIOS question: Work on both.

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Thank you for the 15 seconds of time that you spent. But that page that you linked to is useless.

Wayne Sallee
Wayne@WayneSallee.com
http://www.WayneSallee.com

On 09/23/2018 12:18 PM, Patrick Bartek wrote:
> On Sun, 23 Sep 2018 10:58:54 -0400
> Wayne Sallee <Wayne@WayneSallee.com> wrote:
>
>> What do you recommend for setting up a system that will boot in
>> either UEFI or BIOS mode, so if it is moved back and forth between
>> UEFI and BIOS, it will boot every time?
> I recommend you learn how to use Google or DuckDuckGo, etc. searches for
> such basic queries. The following was the first result in the list of my
> search. Total time spent: about 15 seconds.
>
> https://truthseekers.io/everything-you-need-to-know-to-dual-boot-uefi-gpt-bios-mbr-partitions-swap-space-and-more/
>
> Also, read up on "chainloading."
>
> B
>
>> Wayne Sallee
>> Wayne@WayneSallee.com
>> http://www.WayneSallee.com
>>
>>
>>
>> On 09/21/2018 02:21 PM, Pascal Hambourg wrote:
>>> Le 21/09/2018 à 08:34, steve a écrit :
>>>> Le 20-09-2018, à 20:25:26 +0200, Pascal Hambourg a écrit :
>>>>   
>>>>>>> You don't need to convert anything. UEFI can use DOS partition
>>>>>>> tables.
>>>>>> I know since that's what I'm currently doing.
>>>>> Doing what ?
>>>> Using msdos partition tables.
>>> This is irrelevant because until now you were booting Debian in
>>> legacy (BIOS) mode.
>>>>> I am not talking about you doing anything. I am saying that
>>>>> native UEFI boot (NOT legacy boot) can use a disk with a DOS
>>>>> partition table, provided that it has an EFI system partition (Id
>>>>> 0xef).
>>>> Isn't it ef00?
>>> No. ef00 is a gdisk specific mnemonic for the EFI system partition
>>> type identifier in a GPT partition table. The actual GUID is
>>> C12A7328-F81F-11D2-BA4B-00A0C93EC93B. (0x)ef is the partition type
>>> identifier for an EFI system partition in a DOS partition table.
>>>> Because what I finally did is install a fresh Debian on another
>>>> device (using GPT) and the ACPI errors still were there.
>>> In legacy mode (with a BIOS boot partition) or EFI mode (with an
>>> EFI system partition) ?
>>>> I used the opportunity of having another Debian to convert my sda
>>>> disk to GPT tables, and change the BIOS setting to UEFI only (just
>>>> for the sake of it). So all my disk have a GPT partition table
>>>> except for the 3 ones for the RAID1 array. Not sure whether I can
>>>> use the same manipulations to convert them to GPT also. But since
>>>> they work fine, I might leave it as it is.
>>> You can, but IMO it provides little value. GPT is useful in the
>>> following cases :
>>> - disk bigger that 2 TiB
>>> - more that 4 partition without the extended/logical partition
>>> kludge
>>> - need to use PARTLABEL or PARTUUD (but RAID uses its own UUID)
>>> - system disk for Windows in EFI mode
>>>
>>> AFAICS none of these conditions apply to your RAID disks. However I
>>> noticed that 2 out of the 3 RAID partition on each disk are logical
>>> partitions. This is not necessary if there are only 3 partitions
>>> per disk. So in order to get rid of the extended partition kludge,
>>> you could either convert the logical partitions into primary
>>> partitions or convert the partition table to GPT.
>>>
>>>   
>

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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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