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

[Mathieu Trudel-Lapierre]

All that patch would do is show a pretty error message earlier, not
actually make sure the problem is fixed -- upgrades would still fail;
installs would still fail on RAID.

This has to do with grub not grokking the metadata format on disk, which
is avoidable by using metadata 0.90.

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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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