Ubuntu
grub2 package

  1. Bug #1868553
  2. Comment #2

Comment 2 for bug 1868553

Revision history for this message
Steve Langasek (vorlon) wrote :

"for each device in the array"

You cannot put EFI system partitions in a Linux software raid device. This is unsupported. You will get corruption the first time your EFI writes data to one of the VFAT filesystems (which EFI is allowed to do).

As of Ubuntu 20.04, the grub package has support for synchronizing the bootloader content of multiple ESPs, which is the safe way to handle EFI boot across multiple disks in a way that is resilient in the face of disk failure. (And yes, it requires creating multiple boot entries in nvram.)