Irreparable file systems after accidental misuse of gpart bootcode … (EFI Bootstrap Question on 13.0)

[Graham Perrin]

On 19/04/2021 15:30, john via freebsd-questions wrote:
> # gpart bootcode … -i 1 …

In your case (and others), index 1 was the wrong target.

The screenshot at 
<https://new.reddit.com/r/freebsd/comments/mvvloi/-/gvf25sf/> 
demonstrates how writing bootstrap code can leave the file system not 
only non-mountable, but irreparable.

I'm glad that you managed to recreate what's required.