How to install GRUB EFI to RAID1


This Content is from SuperUser. Question asked by schweik

While configuring a new server, I try to install the Debian Linux Buster at mirrored disks /dev/sda and /dev/sdb with uEFI.
I tried various combination:


/dev/sda and /dev/sdb - > /dev/md1 (RAID1) with GPT partition table   
/dev/md1p1 - FAT32 partition 200MB EFI
/dev/md1p2 - ext4 partition 200GB    /


/dev/sda w. GPT, /dev/sda1 and /dev/sda2 raid member
/dev/sdb w. GPT, /dev/sdb1 and /dev/sdb2 raid member
/dev/sda1,  /dev/sdb1  - > /dev/md1 - FAT32 200MB EFI
/dev/sda2,  /dev/sdb2  - > /dev/md2 - ext4 200GB  /

but during Debian installation the GRUB refuses to be installed.

There is no option in GRUB installation step to force EFI installation. The only possibility is to finish the installation without a loader, and then do the GRUB/EFI manually.

But there are no hints, how to do that.


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