[Bug 1466150] Re: grub-install breaks when ESP is on raid

[Seth Arnold]

On Mon, Nov 30, 2020 at 05:38:10PM -0000, John Robinson wrote:
> If the user knows she's building her ESP on RAID, she probably knows
> enough not to be writing to the RAID's constituent devices
> independently.

Given how many broken grub configurations there are in the world that
come out of the woodwork when we do grub package updates, we shouldn't
automatically assume users know what they're doing. They're often
following (bad) advice they found online without understanding the
consequences of what they did.

The tooling now making it easy to install to multiple partitions is a
definite improvement over the previous state.

Thanks

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https://bugs.launchpad.net/bugs/1466150

Title:
  grub-install breaks when ESP is on raid

Status in grub-installer package in Ubuntu:
  Triaged

Bug description:
  I run a server with mirrored (RAID1) disks using grub-efi.

  Root and /boot and /boot/grub are on mirrored partitions.

  I have EFI partitions on both disks but it is not possible to RAID1
  these as they are FAT32.  On an EFI system grub-install will only
  install to one of the EFI partitions and so after running install-grub
  you have to remember to copy the EFI file across.

  Could grub configuration and grub-install be amended to automatically
  install to multiple disks?

  Searching around there seem to be many people asking this question
  without any elegant solution.

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