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.