On Fri, 2024-01-26 at 16:57 +0100, Nicolas George wrote: > hw (12024-01-26): > > How do you make the BIOS read the EFI partition when it's on mdadm > > RAID? > > I have not yet tested but my working hypothesis is that the firmware > will just ignore the RAID and read the EFI partition: with the scheme I > described, the GPT points to the EFI partition and the EFI partition > just contains the data. > > Of course, it only works with RAID1, where the data on disk is the data > in RAID.
Ok if Andy and you are right, you could reasonably boot machines with an UEFI BIOS when using mdadm RAID :) How is btrfs going to deal with this problem when using RAID? Require hardware RAID? Having to add mdadm RAID to a setup that uses btrfs just to keep efi partitions in sync would suck.
