Re: Whole-disk RAID and GPT/UEFI

[Tim Woodall <debianuser@woodall.me.uk>]

On Wed, 22 Feb 2023, Nicolas George wrote:

> Hi.
>
> Is there a solution to have a whole-disk RAID (software, mdadm) that is
> also partitioned in GPT and bootable in UEFI?

I've wanted this but settled for using dd to copy the start of the disk,
fdisk to rewrite the GPT properly then mdadm to rebuild the raid on the
remainder.

My understanding is that UEFI can potentially write, bypassing the raid
and causing the two drives to be out of sync anyway. I think only
hardware raid where the bios thinks it's a single disk can avoid this
(or software raid aware bios I guess)