On Sat, Dec 13, 2025 at 08:37:55AM -0500, Nick Holland wrote: > IIRC, there was some even a valid OpenBSD process > which would clobber the disklabel if you do this...
Formatting the partition at offset zero as FAT will trash a disklabel stored at LBA 1. Various other non-obvious things will also clobber it. For example, if somebody follows general instructions for zeroing out a partition using dd, and naively tries to zero out just the partition that starts at offset zero, (which may or may not be 'a'), then they will also clobber a disklabel that happens to be at LBA 1.
