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

[AnrDaemon]

ESP is also on RAID1 with 0.90 meta.

# mdadm --detail /dev/md0
/dev/md0:
        Version : 0.90
  Creation Time : Tue Aug 16 11:08:49 2016
     Raid Level : raid1
     Array Size : 266176 (259.98 MiB 272.56 MB)
  Used Dev Size : 266176 (259.98 MiB 272.56 MB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Fri Nov 18 15:10:03 2016
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           UUID : 8738f3e7:91896e1d:e368bf24:bd0fce41
         Events : 0.23

    Number   Major   Minor   RaidDevice State
       0       8        1        0      active sync   /dev/sda1
       1       8       17        1      active sync   /dev/sdb1

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

Title:
  grub-install breaks when ESP is on raid

Status in grub2 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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