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Re: Automatically installing GRUB on multiple drives

From "Thomas Schmitt" <scdbackup@gmx.net>
Newsgroups linux.debian.user
Subject Re: Automatically installing GRUB on multiple drives
Date 2024-01-24 12:50 +0100
Message-ID <HZJVv-5fql-5@gated-at.bofh.it> (permalink)
References <HZIwq-5eCE-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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Hi,

i cannot make qualified proposals for the GRUB question, but stumble over
your technical statements.

Nicolas George wrote:
> Since mdadm can only put its superblock at the end of the device (1.0),
> at the beginning of the device (1.1) and 4 Ko from the beginning (1.2),
> but they still have not invented 1.3 to have the metadata 17 Ko from the
> beginning or the end, which would be necessary to be compatible with
> GPT,

Although it would be unusually small, it is possible to have a GPT of
only 4 KiB of size:
- 512 bytes for Protective MBR (the magic number of GPT)
- 512 bytes for the GPT header block
- 3 KiB for an array of 24 partition entries.

Question is of course, whether any partition editor is willing to create
such a small GPT. The internet says that sfdisk has "table-length" among
its input "Header lines". So it would be a matter of learning and
experimenting.
(Possibly i would be faster with writing the first header blocks by
hand, following UEFI specs or my cheat sheet in libisofs.)


> we have to partition them and put the EFI system partition outside
> them.

Do you mean you partition them DOS-style ?
If so, then a partition of type 0xEF could be used as system partition.
Probably any partition type will do, because EFI is very eager to look
into any partition with FAT filesystem.


Have a nice day :)

Thomas

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Thread

Automatically installing GRUB on multiple drives Nicolas George <george@nsup.org> - 2024-01-24 11:20 +0100
  Re: Automatically installing GRUB on multiple drives "Thomas Schmitt" <scdbackup@gmx.net> - 2024-01-24 12:50 +0100
    Re: Automatically installing GRUB on multiple drives Nicolas George <george@nsup.org> - 2024-01-24 21:10 +0100
      Re: Automatically installing GRUB on multiple drives "Thomas Schmitt" <scdbackup@gmx.net> - 2024-01-24 22:00 +0100
        Re: Automatically installing GRUB on multiple drives Nicolas George <george@nsup.org> - 2024-01-26 10:30 +0100
          Re: Automatically installing GRUB on multiple drives "Thomas Schmitt" <scdbackup@gmx.net> - 2024-01-26 11:10 +0100
      Re: Automatically installing GRUB on multiple drives Tim Woodall <debianuser@woodall.me.uk> - 2024-01-26 04:40 +0100
        Re: Automatically installing GRUB on multiple drives Nicolas George <george@nsup.org> - 2024-01-26 08:50 +0100
          Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-01-26 09:40 +0100
            Re: Automatically installing GRUB on multiple drives Nicolas George <george@nsup.org> - 2024-01-26 10:20 +0100
              Re: Automatically installing GRUB on multiple drives "Thomas Schmitt" <scdbackup@gmx.net> - 2024-01-26 10:50 +0100
              Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-01-26 11:00 +0100
              Re: Automatically installing GRUB on multiple drives Tim Woodall <debianuser@woodall.me.uk> - 2024-01-26 14:20 +0100
                Re: Automatically installing GRUB on multiple drives Tim Woodall <debianuser@woodall.me.uk> - 2024-01-26 14:30 +0100
                Re: Automatically installing GRUB on multiple drives gene heskett <gheskett@shentel.net> - 2024-01-26 14:50 +0100
                Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-01-26 15:40 +0100
                Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-01-26 15:20 +0100
      Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-01-26 17:00 +0100
        Re: Automatically installing GRUB on multiple drives Nicolas George <george@nsup.org> - 2024-01-26 17:00 +0100
          Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-01-28 17:20 +0100
            Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-01-28 17:50 +0100
              Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-01-28 21:10 +0100
                Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-01-28 23:00 +0100
            Re: Automatically installing GRUB on multiple drives Dan Ritter <dsr@randomstring.org> - 2024-01-28 18:20 +0100
              Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-01-28 18:40 +0100
                Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-01-28 21:10 +0100
                Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-01-28 23:00 +0100
                Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-01-29 17:30 +0100
                Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-01-30 01:00 +0100
                Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-01-30 22:00 +0100
                Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-01-31 16:20 +0100
                Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-01-31 23:00 +0100
                Re: Automatically installing GRUB on multiple drives Franco Martelli <martellif67@gmail.com> - 2024-02-02 14:50 +0100
                Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-02-02 20:00 +0100
                Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-02-03 19:30 +0100
            Re: Automatically installing GRUB on multiple drives Franco Martelli <martellif67@gmail.com> - 2024-01-29 14:50 +0100
              Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-01-29 18:00 +0100
                Re: Automatically installing GRUB on multiple drives Nicolas George <george@nsup.org> - 2024-01-29 18:10 +0100
                Re: Automatically installing GRUB on multiple drives Nicolas George <george@nsup.org> - 2024-01-30 21:40 +0100
                Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-01-31 23:30 +0100
                Re: Automatically installing GRUB on multiple drives Nicolas George <george@nsup.org> - 2024-01-31 23:30 +0100
                Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-02-02 04:50 +0100
                Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-01-30 21:40 +0100
                Re: Automatically installing GRUB on multiple drives <tomas@tuxteam.de> - 2024-01-29 18:50 +0100
                Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-01-30 21:50 +0100
                Re: Automatically installing GRUB on multiple drives <tomas@tuxteam.de> - 2024-01-31 06:40 +0100
                Re: Automatically installing GRUB on multiple drives hw <hw@adminart.net> - 2024-01-31 23:50 +0100
                Re: Automatically installing GRUB on multiple drives Max Nikulin <manikulin@gmail.com> - 2024-02-02 03:50 +0100
        Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-01-26 17:00 +0100
  Re: Automatically installing GRUB on multiple drives Charles Curley <charlescurley@charlescurley.com> - 2024-01-24 15:30 +0100
    Re: Automatically installing GRUB on multiple drives Nicolas George <george@nsup.org> - 2024-01-24 15:50 +0100
      Re: Automatically installing GRUB on multiple drives Felix Miata <mrmazda@earthlink.net> - 2024-01-24 17:10 +0100
        Re: Automatically installing GRUB on multiple drives Nicolas George <george@nsup.org> - 2024-01-24 21:00 +0100
          Re: Automatically installing GRUB on multiple drives Felix Miata <mrmazda@earthlink.net> - 2024-01-25 00:10 +0100
  Re: Automatically installing GRUB on multiple drives Franco Martelli <martellif67@gmail.com> - 2024-01-24 17:40 +0100
    Re: Automatically installing GRUB on multiple drives Nicolas George <george@nsup.org> - 2024-01-24 21:00 +0100
  Re: Automatically installing GRUB on multiple drives Andy Smith <andy@strugglers.net> - 2024-01-24 21:30 +0100

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